Loop Control With SIMATIC

SIMATIC based technology Loop control with SIMATICProduct Brief · April 2002 Summary The tasks to be handled by programmable controllers (PLC) are becoming increasingly complex. In many cases, solutions for closed-loop control tasks already belong to the standard repertoire of a PLC. Closed-loop control is required in many different fields of application: · General mechanical engineering · Industrial plant construction · Industrial furnaces cooling and heating unit construction · Food processing industry · Rubber and plastics machines · Wood and paper industry · Chemical and process industry · Glass and ceramics industry The most frequent applications are PID controls for analog variables such as temperature, pressure and flow. SIMATIC® provides many functions for solving such closed-loop control tasks: · Integrated functions are available in the programming software or in the CPU for simple closed-loop control tasks. · Appropriate®option packages based on the STEP 7 programming software are available for solving medium and complex control tasks. · Highly complex closed-loop control tasks with backup facilities are most appropriately solved using special function groups. Control with SIMATIC offers many advantages: · SIMATIC offers a system-wide product range for control tasks of any complexity · The software solutions can be implemented with all SIMATIC S7-200®, S7-300®, S7-400® and C7 controllers as well as with PC-based control (WinAC®) · The hardware solutions can be used in the SIMATIC S7-300/S7-400 and C7 controllers and distributed with the ET 200® · Each solution can be implemented system-wide via all controllers with similar functions · All functions are parameterized in the same way using a simple screen form interface Contents of the Product Brief “Closed-loop control with SIMATIC” Selection guide for controllers Controller types Control structures Integrated functions PID Control in STEP 7®, STEP 7 (Micro/Win), CFC, CPU 313C/314C: Integrated, simple PID control algorithm for universal applications with SIMATIC S7 PID Temperature Control: Integrated, simple PID control algorithm designed specifically for temperature control Modular PID Control: Range of function blocks for modular closed-loop control for S7-300/S7-400 Standard PID Control: PID controller with off-the-shelf control structures for SIMATIC S7-300/S7-400 Function modules Page 3 Page 4 Page 5 Page 12 ‡ STEP 7 option package (PID control) Page 9 Page 10 FM 355 C/S, FM 455 C/S: Page 6 Controller module with backup facility for universal applications with online self-tuning for SIMATIC S7-300, C7, ET 200M ‡ Application modules STEP 7 option package (PID self-tuner) Pulse width modulation Technical specifications 2 FM 355-2 C/S: Controller module with backup facility for temperature control and integrated online self-tuning for SIMATIC S7-300, C7, ET 200M Complex closed-loop control with the FM 458 application module in SIMATIC S7-400 PID Self-Tuner: Function block for online self-optimization of PID controllers for SIMATIC S7-300/S7-400, FM 355/FM 455 ET 200S function modules: 2 Pulse module for intelligent control of actuators Summary of closed-loop control functions/modules Page 8 Product Brief “FM 458” (can be ordered using the fax form on the back page) Page 13 Page 11 Page 14 2 step controllers. pulse controllers -- · · · · · Specialist temperature algorithms Integrated online self-optimization Self-optimization as initial/follow-up optimization at operating point Backup facility Ideal support for thermocouples Blocks Closed-loop control structures FB 58. FM 455S Suitable for flexible use in SIMATIC S7-300. S7-400. pulse controllers · Closed-loop control basic functions · Wide range of closed-loop control functions · · Extensive range of closed-loop control functions Backup facility: continuation of closed-loop control in the event of a stop or CPU failure User-friendly online self-optimization for all controllers with PID self-tuner Blocks FB 41 FB 42 FB 43. and pressure control Requirements Instances Products Formats Controllers Functions Basic SW PID Control Intermediate SW Standard PID Control Advanced SW Modular PID Control HW module FM 355C. step controllers. C7 Intermediate to advanced HW module FM 355-2 SIMATIC S7-300. C7. FB 1 FB 2 FC 1 27 standard function blocks C controllers: FM 355C/455C S controllers: FM 355S/455S Pulse controllers: FM 355S/455S Preset. level. FM 355S. ET 200 Continuous closed-loop controllers. FM 455C. etc.Selection guide for control products Task Can be used in all types of temperature. FB 59 Function blocks for integration into the user program · · Closed-loop Preset. S7-400. and adaptation to operating point Graphic configuration with user-friendly parameter assignment screen forms Changes effective and recorded immediately in online operation 3 Configuration tools Tabular parameter overview 3 . volumetric flow. C7. ET 200M. closed-loop control structures and processing functions can be adapted through parameter assignment Closed-loop control structures Preset. control basic closed-loop control structures and processing functions can be adapted via functions parameter assignment Initial optimiz. closed-loop control structures and Freely configurable: processing functions can be adapted the function blocks through parameter assignment can be combined and interconnected as required Tabular parameter overview Configuration tools Graphic configuration with user-friendly parameter assignment screen forms Changes applied and recorded immediately in online operation Task Designed specifically for temperature control Basic SW PID temperature control Suitable for flexible use in SIMATIC S7-300. ET 200M Requirements Instances Products Formats Controllers Functions Continuous closed-loop controllers. a) Controller types Continuous controller: Response of manipulated variable 50% 25% The choice of controller depends on the final control element to be controlled. In the case of a temperature control with electrical heating elements.STOP CLOCKWISE. e.g. Step controllers Fig. for valves. 2) has 3 switching states. the continuous output signal is converted into a mark/space signal. Digital output (DO): Positioning pulse for Close valve 1 2. 1 Response of a continuous controller (a) and a pulse controller (b) Step controller: (3-position response) AUF A step controller (see Fig. many positioning pulses per unit of time. for example. HEATING . ZU t 1. for example. a specific mark/space ratio is output for each constant temperature value. 1a).g. slides etc.OFF . 1b). Step controllers are used. They can be implemented with or without a position feedback. The output value is an analog value. The pulse controller may have a two-position or three-position response (e. COUNTERCLOCKWISE .e. These final control elements must always have an integrated-action response. The control response is determined by the ratio between the pulse length and the intermediate spaces. The motor only receives a corresponding pulse when either the actual value deviates from the setpoint (without position feedback) or when the position feedback deviates from the calculated manipulated variable.g. All closed-loop control products offer the following controller types: Continuous controllers In continuous controllers (see Fig. DA 0 t 2. result in an almost continuous response of the manipulated 0 variable 25% 25% 37% 50% 50% T T t In pulse controllers (see Fig. DA 0 t Fig 2: Response of a step controller for a valve 4 . Step controllers are used if a control element with latching is to be controlled. dampers. for electric motors as the actuator.Controller types We would like to start with a summary of the most important controller types and structures that can be implemented with SIMATIC S7/C7. Digital output (DO): Positioning pulse for Open valve 1 1.COOLING). the manipulated variable Y can assume any value within the control range. Pulse controllers t b) Pulse controller with one digital 1 output (2-position control): Response of pulse/space signal: A short period T. Such controllers are required if the final control element requires a continuous signal (e. a voltage constantly applied to a valve). i. the setpoint is changed online here. The special task of the follow-up controller is to bring the controlled variable into line with the continuously modified setpoint quickly and precisely. Flow of air Temperature control with classical ratio cascade control A combination of a cascade structure and a subordinate ratio structure results in a ratio cascade control as shown in the lower figure using an example of a temperature control (master controller) with a ratio control for air and gas (follow-up controller). The subordinate control loop in the lower figure shows the design of a ratio control where the ratio of air and gas is held constant. A cascade control structure comprising a master controller and a follow-up controller. is illustrated in the upper figure. Follow-up control Liquid PID 1 Master controller PID 2 Follow-up controller Manipul. 5 . The measured intermediate variable is adjusted to a defined setpoint by the follow-up controller. Ratio control Temperature/flow cascade control PID 1 Master controller PID 2 Follow-up controller Manipul. A follow-up controller is frequently used as a subordinate controller in a cascade structure. ratio or blending control.Control structures Fixed setpoint control This is the simplest control structure where a fixed setpoint is defined on the controller. and also as a master controller in a cascade. The total quantity required must also be controlled. Examples · Heater with control of steam flow and temperature · Position control with subordinate speed and current controls. variable Heat exchanger In contrast to a fixed setpoint control. This setpoint is only rarely changed depending on the process. variable x Flow of gas Ratio factor Air Gas In some processes. Such tasks require a ratio control. the control response can be improved by using additional variables from the process. This setpoint is defined by the master controller and its result. Blending control In blending control. A fixed setpoint controller is frequently used as a single-loop controller. Cascade control Flow Temperature If the control results are unsatisfactory when using single-loop control. the components to be mixed must be held at a defined percentage similar to the ratio control. the ratio between two or more controlled variables is more important than their absolute values. Test functions Extensive test functions and simulation options are available to offer assistance during the startup process. simply download the current version from the Internet.g. electrical heating strips and cartridges). Both modules have a special selfoptimization function with which the controllers can be optimized. volumetric flow or level control in numerous applications in machine and system production. Two versions of the modules are available for driving different final control elements: · FM 355 C/FM 455 C as a continuous controller for driving analog final control elements. Use the parameter assignment software to transfer the new firmware into the module. the modules also work in the following modes: · Manual mode · Follow-up mode · Safety mode Firmware update The closed-loop control modules contain several ready-to-use control structures: · Fixed setpoint control · Cascade control · Ratio control · 3-component control Up to 4 controllers can be interconnected to form one control structure (this limit also applies to FM 455). 6 6 . Application The FM 355 (right) and FM 455 (left) closed-loop control modules The closed-loop control modules are suitable for universal use. They can also be used to control continuous processes and batch processes. e. The backup functions enable fault-free operation if the CPU fails or goes to Stop. The module has two individual algorithms with various optimization options: · Fuzzy controller with integrated online self-optimization for temperature ranges. Functions Controller optimization Operating modes In addition to automatic and backup modes.FM 355 and FM 455 universal closed-loop control modules The FM 355 closed-loop control modules for SIMATIC S7-300. A comprehensive manual and Getting Started tutorial are also provided. · FM 355 S/FM 455 S as a step or pulse controller for driving motorized final control elements (integrating control elements or binary-driven final control elements e. It is possible to set a safety setpoint or a safety manipulated variable for backup mode. Optimization possible for setpoint step changes of 12% and upwards. pressure.g. Scope of delivery The parameter assignment software supplied with the modules contains extensive online help for the input screen forms as well as a function block that provides the module data to the STEP 7 program in the CPU channelby-channel. This function ensures that the controller continues to operate even if the CPU fails or goes to Stop. The backup function in particular makes the modules particularly suitable for I&C applications in the chemical. Backup mode In order to update the firmware fast and effortlessly. C7 and ET 200M (on S7-300/S7-400 master) and FM 455 for S7-400 can also be used in PCS 7 and offer the same functionality. for temperature. · PID controller can be optimized via the parameter software (PG/PC required). the FM 455 has 16. The only difference is the number of channels: the FM 355 has 4 channels. glass and ceramics industries. The resolution is 12 or 14 bits including the sign. Connectable sensors Parameter assignment screen form for FM 355 S The associated characteristics are stored on the module for the connectable sensors and are activated through parameter assignment. 7 . An additional input is used for temperature compensation in thermocouple mode. of channels + 100 ms for temperature compensation On the FM 455. Sensors and actuators can be connected directly to the module.FM 355 and FM 455 universal closed-loop control modules Design Both modules are double-width. If a sensor characteristic is not already present. sampling takes place in two groups in parallel. of channels + 20 ms for temperature compensation · 14-bit resolution: 100 ms * no. The sampling time comprises: · 12-bit resolution: 20 ms * no. it is possible to enter any characteristic by defining interpolation points. A maximum of 8 analog inputs is permitted per group. Comprehensive operating and monitoring functions facilitate testing and therefore reduce the duration of the startup phase. Inputs The 4 or 16 analog inputs can be used for analog-value acquisition or for disturbance variable feedforward. which can be used for controller optimization during operation without the need for a PG/PC. A quasi-stationary state is required to start optimization. However. Scope of delivery Controller optimization on temperature controller module FM 355-2 See FM 355 (page 6). input through the operator panel is not possible in the event of a CPU failure. Application The module is designed to control temperature ranges. Controllers with heating or active cooling functions can be implemented and optimized. Resolution As the FM 355 but with the addition of the Type E thermocouple. Backup mode Increased accuracy The accuracy of the FM 355-2 is greater than that of the FM 355. The sampling time is 100 ms for each analog input used. the pÁ80 mV input is not available. actual value drift can be tolerated. The user can integrate this easily into an OP27 project. Temperature compensation when using thermocouples: · Through external Pt100 · Internal temperature detector · Parameterized value Test functions The analog inputs have a resolution of 14 bits. Like the FM 355. Startup time is reduced considerably as a final state is not required. via a control output jump (initial optimization) or when the controller reaches its operating point (follow-up optimization). The control output limits can be modified online. the module can continue to control operation in backup mode (see FM 355). This is particularly beneficial when using thermocouples. The control parameters are available as soon as the turning point of the step response is reached.FM 355-2 temperature controller module ‡ The FM 355-2 temperature controller module is a function module based on the FM 355 and designed specifically for controlling temperature ranges. it must be taken into account along with the sampling time. 8 8 . i. However. In the event of a CPU stop or failure. If the compensation input is used. Both versions of the module have an integrated online self-optimization facility and a backup facility. other ranges with similar requirements can also be controlled. In principle. Self-optimization can be started either when the ambient temperature is reached. the FM 355-2 has 4 channels and is available as the FM 355-2 C and FM 355-2 S. Sampling time Extensive test functions and simulation options are available to offer assistance during the startup process. Controller optimization The controller’s response to setpoint changes can be changed and overshoots avoided by adjusting the attenuation of the proportional component in the event of setpoint changes.e. A screen form is supplied with the module to facilitate control of the major controller functions. Functions Control algorithm The module operates with a PID algorithm. The controller has a control zone to accelerate the approach to the operating point. Connectable encoders The FM 355-2 has an integrated online self-optimization function. The 27 blocks of Modular PID Control are complement one another perfectly and can thus be combined both quickly and easily using the CFC graphic editor (see figure above). which considerably simplifies the commissioning of the PID controller. 9 9 . CFC V5. It is often worth purchasing the product even if the only blocks used are computational blocks such as dead band. and CFC. Complex control structures can therefore be designed and tested reliably and clearly within a short time. Scope of delivery Modular PID Control with the CFC graphic editor The scope of delivery includes the following ready-to-use examples: · Fixed setpoint controller with various outputs · Single-loop ratio controller · Multiple-loop ratio controller · Blending controller · Cascade controller · Controller with precontrol · Controller with feedforward control function · Range selection controller · Multiple variable controller Sampling times down to 5 ms are possible in conjunction with the SM 334 analog module.0 (Continuous Function Chart) and later supports the configuration and user-friendly interconnection of any type of control structure. can be supplied for Modular PID Control with SIMATIC S7/C7. Modular PID Control is a universal modular concept for solving a wide range of closed-loop control tasks. For the first time. SCL. The following controller types are available: · Continuous PID controller · Pulse controller · Step controller Application Modular PID Control is suitable both for applications requiring extensive control structures and for applications in which memory must be saved and individual controllers from the standard module stock are sufficient for application requirements. Functions Design of closed-loop control structures with CFC The following technical functions have the same characteristics as in Standard PID Control: · User-friendly parameter assignment · Test functions · Controller optimizing · Transient response without overshoots · Control algorithm for step controller Combination with the PID Self-Tuner is also recommended here for online selfoptimization of controlled systems for temperature. The blocks can be connected using STEP 7.Modular PID Control Modular PID Control is a collection of standard function blocks. In particular when combined with CFC. The main applications are in processing plants. which can be combined to create any type of control structure for SIMATIC S7/C7. Modular PID Control is available as a function block library for SIMATIC S7-300/S7-400 and C7. This software contains a control loop display with bargraphs and a curve recorder for displaying signal characteristics (see left figure on page 11). A software program. polygon. scaling or time scheduler. pressure. The user interface for parameter assignment means that changes to parameters can also be made with the CPU in the RUN status. This simplifies start-up and produces rapid results. Using this self-tuning function. In addition. or transient response without overshoots. a control loop display with bar graph and curve recorder are available for plotting the signal curves (see left figure on page 11). and determines the optimum control parameters for PI and PID controllers. flow and level controls. To initiate the function. the process values are automatically recorded and displayed. Parameter assignment with the uniform. The current value is additionally displayed in online mode. controllers can be optimized very quickly even without precise knowledge of the controlled system. Application Standard PID Control is suitable for closed-loop control tasks of low or medium complexity: for temperature. During the transient response. Transient response without overshoots In the case of self-optimization. The multi-instance data block (DB) benefits from user-friendly support from the control structure image. For Standard PID Control. in MS Excel. clearly arranged Windows user interface that supports intuitive working methods is particularly simple and is common to all function packages that rely on STEP 7. and their effect on the result to be displayed simultaneously. As in the case of the controller modules FM 355/455 and Modular PID Control. The clear controller structure allows functions to be selected or deselected simply using software switches (see figure above). 10 10 . Scope of delivery The scope of delivery of the function blocks includes the following ready-touse examples: · Step controller with loop simulation · Continuous controller with loop simulation · Multiple loop ratio controller · Blending controller · Cascade controller Siemens offers parameter assignment software for Standard PID Control that permits the functions of the standard function block to be easily utilized.g. two different transient responses are available for selection: transient response of the control loop with overshoots of up to 10 %. The current value is additionally displayed in online mode. changes to parameters are now also possible while the curve recorder or the loop display are active. loop image. The windowing techniques of Windows allow the control structure. the process is activated with a step change in manipulated variable or a modification in the setpoint. the parameters entered. which can be adapted to the control process simply by activating or deactivating functions. controller optimization is integrated in the parameter assignment software. Functions Test functions The clear controller structure of Standard PID Control User-friendly parameter assignment Controller optimization A comprehensive range of test functions facilitates startup and diagnostics. Standard PID Control is particularly suitable for applications previously automated with compact controllers. · Cursor positioned in input fields: Display of parameter name and address in instance block. · Cursor positioned on measuring points: Display of name and address in the instance block. curve recorder and controller optimization.Standard PID Control Standard PID Control is a preconfigured controller structure. The curves plotted with the curve recorder can be saved to file for subsequent editing e. This means that self-optimization can also be used when overshooting has to be avoided at all costs. the relevant information is displayed on the screen. At each input step. The program calculates a mathematical module of the controlled system from the values. it can output pulse-width-modulated control outputs. 11 . A control algorithm ensures that step controllers switch up to 50 % less often than conventional step controllers for the same control precision. Operating modes The 2 Pulse module operates in the following modes: · Pulse output: A single pulse is output on the 24 V digital output.OFF COOLING) facilitates startup of the temperature control. e. 15 mm wide ET 200S technology module for controlling actuators and valves.A pulse-width-modulated signal sequence is output on the 24 V digital output (this operating mode is particularly suitable for control engineering).Standard PID Control 2 Pulse module Optimization of Standard PID Control with PID Self-Tuner 2 Pulse module Functions (continued) Pulse controller 2 Pulse module Step controller The pulse controller is now combined with the continuous controller in one block including the conversion into a pulse/space signal (pulse generator). relieving the load on the CPU. It is also possible to set the sampling time of the controller separately from the period duration of the pulse generator. The example of a pulse controller with 3-position output (HEATING . On the other hand. The advantage of a shorter sampling time is the faster reaction of the controller to faults and operator input commands. Areas of application The following functions can be parameterized for the manual/ automatic switchover: · Bumpless manual/automatic switchover · Manual/automatic switchover with bumps and corresponding jump in the manipulated variable for fast compensation of the deviation · Tracking of manual value in automatic mode The 2 Pulse module can for example be used to control solid-state contactors or to switch cartridge type heaters. so that the period duration can be longer than the sampling time. Standard PID Control. a longer period reduces wear on the final control element by reducing the pulse generator frequency.A signal present on the 24 V digital input is output on the 24 V digital output with an ON/OFF delay · Pulse train: A number of pulses set by the user is output on the 24 V digital output. or . Extended manual/automatic switchover The 2 Pulse module is a 2-channel. This simplifies the parameter assignment and startup of the pulse controller. · PWM (Pulse Width Modulation): . In connection with the SIMATIC software control packages. Oscillations in actual values are suppressed in that the effective period is automatically shortened.g. A further advantage is the lower CPU loading since the pulse generator can be scanned at longer intervals. This reduces wear on the final control elements and lengthens their service life considerably. In principle. STEP 7 Version 5. the user does not have to interconnect any controller blocks. · When developing the blocks. The blocks also have an integrated pulse generator module for implementing pulse controllers. the FB 58 TCONT_CP blocks also have functions for temperature control via an integrated online selfoptimization facility. In addition to the PID Control functions described. STEP 7-Mini CFC V1. In addition to the universal PID Control function blocks. particular importance was placed on ease of handling · For example. Programming is replaced by parameterization. PID Control uses standard function blocks loaded into the CPU to solve the closedloop control task.1 SP3 and later offers two new controller blocks designed specifically for controlling simple temperature ranges. Scope of delivery The blocks are supplied integrated into STEP 7 together with parameter assignment software.S7-300/S7-400 is integrated in STEP 7. In contrast to the solution with PID Control. a sample project and an electronic manual. The FB 59 TCONT_S controller block is used to create step controllers. It is particularly suitable for simple control tasks. This means that a PG/PC is not required for optimization. 12 . Scope of delivery Control parameters on the S7-300/400 using the example of PID Control · · SIMATIC S7-200 Controller block for implementing a continuous closed-loop controller. other ranges with similar requirements can also be controlled.1 and later as well as in the operating system of the CPU 313C/314C.S7-200 is a component STEP 7MicroWin programming software. . the function block interfaces were simplified considerably for the purpose of userfriendliness The controller blocks can be used in heating or cooling applications. The new parameterization software can be started directly from the SIMATIC Manager by double-clicking on the associated instance data block. step controller or pulse controller SIMATIC S7-300 One function block each for the continuous closed-loop controller. the parameterization software also has a self-optimization wizard and a special installation screen form. PID Control for SIMATIC . The number of controllers which can be implemented with the S7-300/S7-400 depends on the available memory space and the resulting total runtime. In addition to the familiar PID Control functions.PID Control PID temperature control ‡ Areas of application PID Control provides a simple PID algorithm with which simple closedloop control tasks can be directly solved. step controller or pulse generator module PID Temperature Control Application Functions Functions Controller parameter assignment · · PID Control for S7-200: Simple programming thanks to a special “operations wizard” PID Control for S7-300/S7-400: User-friendly thanks to tabular overview (see figure). actuators and switching devices. By adding a function block. The process must satisfy the following conditions: · Stable asymptotic transient response · Reasonable delay times (delay time < 0. enabling users to set PID controllers online and adapt them during operation.3 * recovery time) · Sufficient linearity in the selected working range · Sufficient quality of measured signals · Moderate process gains. PID Self-Tuner is ideal for optimizing temperature. Appropriate modules from the extensive SIMATIC range can also be used. Special outputs for pulse width modulation are also available. level. and volumetric flow controllers.FB TUN_ES for optimizing step controllers with and without position feedback Sample project Electronic manual Scope of delivery · · · Initial online tuning of PID controllers 13 . Functions Online adaptation of the PID controller for follow-up optimization at the operating point Optimization of processes with heating and active cooling Manual mode Optimization for control zone response Test functions Function blocks . Parameter assignment The “PID Control Parameterization” tool supplied with STEP 7 is used for parameter assignment.FB TUN_EC for optimizing continuous PID controllers . These are suitable for the direct control of valves. PID Self-Tuner is versatile: it can be combined with all controller products and used on both the SIMATIC S7-300/ S7-400 and C7 hardware platforms. the PID SelfTuner software package converts the PID controller into a self-optimizing PID or PI controller. The following blocks are supplied as system function blocks (SFBs): · Continuous controller · Step controller · Pulse generator module The advantage: No user memory is used for the controller blocks.Integrated controller PID self-tuner PID-self-tuner PID parameters Manipulated variable Setpoint Actual value Process PID controller SIMATIC S7-300 CPU 314C PID self-tuner optimizes a PID controller The operating systems of the new 313C and 314C compact CPUs contain integrated closed-loop control blocks. Functions Application · · · · · · Same functional scope as PID Control. Both the analog and digital I/O integrated in the CPU can be used to implement the controller. The controller can be adapted to the process quickly and easily in online mode using easy-to-understand functions and systematically constructed examples. value branch) Yes (in man. var. var. var. CFC. SFB 41) Yes (FB 41. var.) Yes (in setpoint and actual value branches) Yes -Yes (in setpoint and man. SFB 42) Yes (FB 43. manual PID controller with off-theshelf control structure and for control tasks of simple to medium complexity. FB 43 and SFB 43) Yes (FB 42. var. SFB 43) Yes Yes (FB 58) Yes (FB 58) Yes (FB 59) Component of FB 58 Yes Yes (FB 1) Yes (FB 1) Yes (FB 2) Yes (component of FB 1) Component of PID algorithm Component of PID algorithm Yes (in the actual value and man. for continuous and In conjunction with pulse controllers PID Self-Tuner (integrated optimization) Online self-optimization of controller with -controlled systems for temperature Online self-optimization of controller with -systems other than for temperature In conjunction with PID Self-Tuner also for fill level and flow control Controllers for ranges with similar characteristics can be optimized With param. CFC. CPU 313C/314C ‡ PID Temperature Control Software. branches) Yes Yes (FC 1) -- System deviation monitoring -- --- Controller call distributor (for even -distribution of CPU program runtime load) Supplementary functions Setpoint generator Time scheduler Ramp generator 1st order delay element 2nd order delay element ------ ------ ------ Yes (in setpoint branch) Yes (in setpoint branch) Yes (in setpoint and man. branches) -Yes Yes Yes (in the actual value and man. var. 5 examples Application PID controller in S7-200 for PID controller in STEP 7 simple closed-loop control for simple closed-loop tasks: up to 8 independent control tasks control loops Properties Number of channels Installation width Backup capability Startup (test.) Yes (in act. branch) Yes (in the system dev. SFB 41. branches) Component of PID algorithm Component of PID algorithm Yes (in act. branch) Yes (in act. value branch) Yes (in setpoint. Component of STEP 7-MicroWin PID Control in STEP 7. parameterization software. software Elementary closed-loop control functions PID algorithm Output of continuous PID controller Output of pulse controller Output of PID step controller Pulse generator Integrator Differentiator Physical scaling Dead band Conversion of analog input value Conversion of analog output value Limit monitor Limiter Yes Yes Yes -Yes Yes Yes (FB 41. actual value and man. Component of STEP 7 from V5. branch) -Yes (in man. Component of STEP 7. var. value branch) Yes (in man. branches) Yes (as filter in actual value branch) -- 14 .Technical specifications Control functions/modules Delivery form PID Control in S7-200 Software.1 SP3 PID temperature controller in STEP 7 for simple heating or cooling controllers with integrated selfoptimization Standard PID Control SW optional packages: function blocks (FB). value branch and in the system dev. incl.) Yes (in act. diagnostics) 8 channels per CPU See I/Os See I/Os Determined by CPU and I/Os --- Determined by CPU and I/Os ----In conjunction with PID Self-Tuner With parameterization software Yes. branches) Yes Yes Yes Yes (in the system dev. CPU 313C/314C Software. var. tailored onboard I/Os. parameterization software. incl. Specifically for FM 355-2C/S: specialist for temperature control. heating and cooling. manual Modular FB building blocks for complex closed-loop control tasks with maximum flexibility and minimum memory requirements and shortest runtime. manual FB for online selfoptimization of PID temperature controllers. and Getting Started FM 455 C FM 455 S FM 455 C. parameterization software. Ranges with similar characteristics can be optimized Yes. with 12 examples PID Self-Tuner Software. with 3 examples FM 355-2 C FM 355-2 S FM 355-2 C. can be combined with Standard and Modular PID Control.) Yes (in setpoint and manipulated value branches) Yes (FB 7) Yes (FC 1) --- Yes Not required Yes Yes Yes (FB 25) Yes (FB 21) Yes (FB 22) Yes (FB 9) Yes (FB 10) ------ --Yes (in setpoint branch) --- --- Yes (as filter in actual value branch) ---- 15 . integrated online self-optimization of controlled systems for temperature. manual. value branch and in the system dev. and Getting Started Module with off-the-shelf control structures and back-up capabilities when the CPU is at Stop or in the event of a CPU failure. and Getting Started FM 355 C FM 355 S FM 355 C. increased accuracy. Specifically for FM 455C/S: self-optimization to speed up commissioning of control structures. See I/Os Determined by CPU and I/Os -With parameterization SW In conjunction with PID Self-Tuner See I/Os 4 Double width (80 mm) 4 Double width (80 mm) Yes 8/16 Double width: 2 slots (50 mm) Yes -Irrelevant In conjunction with PID controllers Yes With param. FM 355/455 and any PID algorithm.‡ Modular PID Control SW optional packages: function blocks (FB). manual. parameterization software. FM 355 S. improved control response. self-optimizing fuzzy controller With parameterization software or with PID SelfTuner -- Only with parameterization or in conjunction with PID Self-Tuner Yes (FB 19) Yes (FB 13) Yes (FB 13 and FB 20) Yes (FB 14) Yes (FB 20) Yes (FB 8) Yes (FB 6) Yes (FB 16) Yes (FB 5) Yes (FB 2) Yes (FB 3) Yes (FB 11) Yes (FB 12) -------------- Yes Yes (FM 355-2 C) Yes (FM 355-2 S) Yes (FM 355-2 S) Yes (FM 355-2 S) Component of PID algorithm Component of PID algorithm Yes (in act. PID controller with integrated online selfoptimization. incl. incl. Initial optimization and adaptation. manual. FM 355-2 S. software Yes. parameterization software. FM 455 S. Optional package: function blocks incl. value branch) Yes Yes Yes Yes Yes (FM 355 C) Yes (FM 355 S) Yes (FM 355 S) Yes (FM 355 S) Yes Yes (FM 455 C) Yes (FM 455 S) Yes (FM 455 S) Yes (FM 455 S) Yes Yes Yes Yes Yes Yes Yes (in act. CPU 313C/314C PID Temperature Control Standard PID Control ---------------- PID Control in S7-200 ------ Dead time Non-linear static characteristic Linear scaling Linearization Override control Parameter control Range selection (split range) Analog-value switch Setpoint branch Setpoint generator Time scheduler Scaling Limiter Limitation of modification rate FC call (nested) Actual-value branch Format conversion Scaling Smoothing Square-root function Monitoring of modification rate Limit monitor FC call(nested) Closed-loop controller Continuous PID controller PID pulse controller PID step controller Temperature controller Position feedback Connectable encoders Thermocouples Resistance-type thermometer Voltage Current Inputs/outputs Analog inputs per controller channel Digital inputs per controller channel Analog outputs per controller channel Digital outputs per controller channel Connection method ----- ----- ----- ----- ------- ------- ------- Yes YesYes Yes Yes Yes Yes Yes Yes --Yes -- Yes Yes ------ Yes Yes ------ Yes YesYes Yes Yes Yes Yes Yes Yes Yes (programmable) Yes (programmable) -- Yes Yes Yes Poss. CFC. (with PID SelfTuner) -- Yes Yes Yes Yes -- Yes Yes Yes Yes (with PID Self-Tuner) Yes ----- ----- ----- ----- ------ ------ ------ ------ 16 .Technical specifications Control functions/modules Supplementary functions (continued) Adaptive dead band ‡ PID Control in STEP 7. 20 mA Type B. temperature controller Yes Yes Yes Yes Yes Yes (fuzzy) Yes Yes Yes Yes Yes (fuzzy) Yes ----- ----- Type B. 20 mA. 4 . J. root function. J. and Pt100. FB 21) Yes (FB 19 and FB 14) Yes (with PID Self-Tuner) Yes (FB 19 and FB 14) ------ Yes.. 10 mV 0 . R.. R. 0 . root function. S Pt100 Type B. S Pt100 0 . J. and Pt100. J...... K..... 20 mA. 10 mV 0 . 4 . free polygon-based function --Yes ---Yes ---Yes -- Linearization of thermocouples B. 0 . free polygon-based interpolation Yes (FB 17) Yes (FB 18) Yes (FB 24) Yes (FB 26) ----- --Yes -- --Yes -- Yes (FB 25) Yes (FB 21) Yes (FB 16 and FB 23) Yes (FB 12) Yes (FB 22) Yes ------- --Yes Yes --- --Yes Yes --- --Yes Yes --- Yes (FB 2) Yes (FB 16 and FB 23) Yes (FB 9) -Yes (FB 22) Yes (FB 11) -- -------- -Yes Yes Yes -Yes -- -Yes Yes Yes -Yes -- -Yes Yes Yes -Yes -- Yes (FB 19 and FB 13) Yes (FB 19. 10 mV 0 . temperature controller Yes.. K. R. K. E. 20 mA ------ ------ 1 2 1 (only FM 355-2 C) 2 (only FM 355-2 S) Standard front connector 1 2 1 (only FM 355 C) 2 (only FM 355 S) 1 1 1 (only FM 455 C) 2 (only FM 455 S) 17 . S Pt100 pÁ80 mV. R... E.. J. 4 .. K. K. S. 20 mA pÁ80 mV. temperature controller Yes. R.. FB 13.. 20 mA. S.‡ Modular PID Control PID Self-Tuner FM 355-2 C FM 355-2 S FM 355 C FM 355 S FM 455 C FM 455 S Yes (FB 1) Yes (FB 4) Yes (FB 15) Yes (FB 23) -------Yes -Linearization of thermocouples B. CFC. device Authorization/licensing Authorization Runtime license for FB/FC/C library License for parameterization software Order No. software Required for each CPU Required for each PC/PG 6ES7810-4.1 SP3 CFC V1. 6ES7810-4.1 SP3 -STEP 7 from V2. via memory module Yes Yes Yes Can be integrated -Via FB/FC Yes.Technical specifications Control functions/modules Manipulated variable branch Manual/automatic switchover Manual-value generator Scaling Format conversion Limiter Limiting of modification rate FC call (nested) Pulse generator Closed-loop control structures Fixed setpoint control Follow-up control Cascade control Ratio control Blending control 3-component control Split range System environment Central use Distributed use PC-based Control System integration Hot swapping of modules Supported by -STEP 7-MicroWin -STEP 7 from V3... CPU 313C/314C ‡ PID Temperature Control Standard PID Control Yes -Yes Yes Yes --Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes -Limited Limited ---- Yes Yes Yes Yes Limited -Limited S7-300.. for param. via memory card -Irrelevant Irrelevant 6ES7810-2BC01-... -- -- Yes...1 Yes Part of STEP 7 Yes (PID Control is integrated into CFC) Via function blocks Yes. group -Part of STEP 7-MicroWin -Via user program Yes. S7-400.. as DP-. MPI slave Yes -Yes (programmable) ----Yes -Limited Limited ---Yes -Yes Yes ----Yes -Yes Yes Yes --Yes PID Control in S7-200 PID Control in STEP 7.. S7-400. 18 .1 Function blocks Parameterization software Integration with CFC Types of access Module replacement without prog..-.. C7-6xx Yes -Yes -- S7-300.. 6ES7830-2AA.-.. CPU 313C/314C.. C7-6xx Yes -- -STEP 7 from V5..... via memory card or micro memory card S7-200 (CPU 214) -Yes..-.0 CPU 313C/314C from STEP 7 V5. .-... S7-400. with active backplane bus STEP 7 from V5... -- -Covered by FM 355-2 -Covered by FM 355 Covered by FM 355 6ES7355-....1 -STEP 7 from V3. software Required for each CPU Required for each PC/PG 6ES78. for param. -Covered by FM 455 Covered by FM 455 6ES7455-.0 via FB/FC (Function Call) Yes..1 -- Yes....1 Yes Yes Yes.... with CFC from V5.-... 19 .. Covered by FM 355-2 6ES7355-2.-.. ET 200M on S7-Master.-..-. Irrelevant 6ES7860-4AA.... via memory card Yes -Yes Yes. C7-6xx -In ET 200M on S7-Master -- S7-400 --- -STEP 7 from V3..-..1 SP4 STEP 7 from V2. for data exchange with user program Yes Yes Via function block Yes Yes Yes Yes Yes Yes Yes Yes.. C7-6xx Yes -Yes -- S7-300.‡ Modular PID Control PID Self-Tuner FM 355-2 C FM 355-2 S FM 355 C FM 355 S FM 455 C FM 455 S Yes (FB 13 and FB 14) Yes (FB 25) Yes (FB 16 and FB 23) Yes (FB 3) Yes (FB 12) Yes (FB 21) -Yes (FB 20) --------Yes Yes Yes Yes Yes --Yes (only FM 355-2 S) Yes Yes Yes Yes Yes --Yes (only FM 355 S) Yes Yes Yes Yes Yes --Yes (only FM 455 S) Yes (examples 1 and 2) -Yes (example 7) Yes (examples 4 and 5) Yes (example 6) -Yes (example 10) -------- Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes S7-300 (from CPU 313)....... siemens.siemens. You can find more information about SIMATIC based technology on the Internet: www.com/simatic-technology select the brochures you require and download. we can offer you two possibilities: · · click our Web site in the Internet: www.siemens.com/simatic-technology To get in touch with your contact person near you.com/automation/partner Visit the A&D Mall to order products directly from the Internet: . All designations in this Product Brief marked with ® are registered trademarks of the Siemens AG.O.com/automation/mall Siemens Aktiengesellschaft Automation and Drives Industrial Automation Systems P.siemens. © Siemens AG 2002 Subject to change without prior notice. 6ZB5310-0ET02-0BA7 Produced in the Federal Republic of Germany 26100/201356 SB 04021. D-90327 Nuremberg www.Need more information on SIMATIC based technology? But of course! Fax: 0 08 00/74 62 84 27 Please check the appropriate box: Counting/Measuring with SIMATIC Positioning with SIMATIC If you’re looking for detailed information regarding SIMATIC based technology. simple order the brochures you require by FAX (AD/Z0825) Name Address Postal code/City Cam Control with SIMATIC Country Phone/Fax E-mail Unlimited Motion Control with FM 458 in S7-400 www.com/simatic-technology Order No. look in the Internet under: www. Box 4848.siemens.