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Third parties using for their own purposes any other names in this document which refer to trademarks might infringe upon the rights of the trademark owners. Copyright. Actuator Sensor Interface Order number E20001-P285-A497-V2-X-7600 This brochure can be ordered from all Siemens offices.Table 1-2 Further Manuals Manual Topics Programming Manual: This manual contains basic information about designing STEP 7 programs: System Software for S7-300 and Introduction to the efficient solution of programming tasks using a S7-400, Program Design. There is a list with the addresses of Siemens representatives world-wide in Appendix E of Volume 2 of the manual. If you have questions or comments about the manual itself, please complete and return the remarks form. This chapter also explains the additional components that you can connect to a C7. The C7-621 has the following components: MPI interface Digital inputs and outputs Analog inputs and outputs P bus connection (for the IM 621 module) Figure 1-1. C7-621 AS-i With a two-line display and 20 characters per line with characters 5 mm high (see Figure 1-2). C7 CPU with C7 AS-i CP C7 OP When necessary, these units are dealt with separately in the manuals.The most important components and their functions to a C7 are listed in Table 1-1: Table 1-1 Components that Can Be Connected to a C7 Component Function. To install the C7, follow the steps outlined below: Step Action Cut out a section of the switching panel as shown in Figure 2-2. Insert the sealing ring behind the front panel (see Figure 2-1). Lever the securing post upwards ( in Figure 2-5). Lever the securing post out of the guide ( in Figure 2-5). Make the C7 sure that the sealing ring makes a tight seal all round. There must be a clearance of at least 50 mm above and below and 70 mm at the sides of the C7 as shown in Figure 2-6. C7-621 and C7-621 Figure 2-7 illustrates the connection of the C7 power supply for a C7-621.
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AS-i The pinouts of the connectors are shown in the following tables. These connectors only exist on the C7-621. The pinouts of the connectors are shown in the following tables. Digital input (top) left right bottom Digital output (bottom) Analog input Analog output. MPI Interface PG cable S7-300 S7-400. If a system is poorly grounded or not shielded, low frequency and high frequency interference signals can be coupled into the internal bus of the controller and cause malfunctions. The shield is connected directly to the ground terminal of the C7 via a grounding bar. Procedure Fit the grounding bar and the shield clips supplied with the C7-621 as follows: 1. To reset the memory of the C7 OP, follow the the C7 OP steps outlined below: 1. Press and hold down the following keys at the same time: 2. This clock is independent of C7 CPU the clock of the C7 OP. This allows you to count the operating hours of the C7 CPU or a resource it controls.You will learn the following: Which communication options are available to you with an MPI network. The components to which you can connect the nodes of an MPI network. The maximum and minimum cable lengths you can use. Transmission Rate The transmission rate of the C7 is fixed at 187.5 Kbps. Node (Device) Default Default Highest MPI MPI Address Address C7 OP Depends on the OP C7 CPU Rules for MPI When assigning MPI addresses, keep to the following rules:. Reserve MPI address “0”. Connecting cable 1000 m max. This establishes the connection to further nodes.The cable can be connected either from the left or right. Switch setting for the first and last station on the PROFIBUS network: “ON”. Vertical Cable Outlet Without PG interface With PG interface. Make sure that you always insert the same colored wire into the same terminal on all connectors (for example the green wire into terminal A and the red wire into terminal B, or vice-versa).
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Make sure that you always fit the same wires to the same terminal A or B (for example always connect the green wire to terminal A and the red wire to terminal B or vice-versa). The bus connector of this node Installation or must have a PG interface (see also Section 3.5). The maximum load on the contacts is 4 A. You can connect the following to the AS-i connectors: Actuators, sensors AS-i power supply unit AS-i CP Power. The AS-i cable is a rubberized 2-wire cable (2 x 1.5 mm ). The special profile of the cable prevents polarity reversal when connecting nodes. Attaching to the Attachments are made to the AS-i cable using the penetration technique. Block Diagram Bottom view of the C7-621 Digital inputs. Note When the power supply is turned on, the digital output applies a pulse to the outputs. Block Diagram The following page has more detailed technical data about the digital outputs. Bottom view of the C7-621 Digital outputs Block diagram of an output Pin name Shaded sections are. C7-621 Analog inputs AI1-U AI1-M Isolated Logic AI2-U sensors C7-CPU AI2-M Recommended connection Input 24V DC Grounding bar Functional ground Figure 7-1 Connection of Isolated Sensors to a Non-Floating Analog Input Non-Isolated Non-isolated sensors are connected to ground locally. Figure 7-4 shows the Sensors as 4-Wire connection of sensors as 4-wire measuring transducers to a non-floating Transducers analog input. Sensor C7-621 Analog inputs e.g. pressure AI1-U meas. Cables for Analog You should use shielded, twisted pair cables for analog signals. This reduces Signals the effects of noise. The shield of the analog cables should be grounded at both ends. Output 2-Wire Connection The connection of loads to a voltage output using a 2-wire connection is made at the analog output AO-U and the reference point of the measuring circuit AO-M.
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Table 7-1 Channels of the Analog Input Module Value Channel Name AI1-U Voltage input Channel 1 (AI1) AI1-I Current input AI1-M Reference potential AI2-U Voltage input Channel 2 (AI2) AI2-I Current input AI2-M. Module-Specific Data Noise Suppression, Error Limits, continued Number of inputs Basic error limit (operational limit at 25 C relative to input Cable length range) Shielded. View from the right of the C7-621 Voltage output Current output Analog output AO-U AO-I AO-M Connection These shaded sections are irrelevant for Pin name this example. Module-Specific Data Data for Selecting an Actuator Number of outputs Output ranges (rated values) Voltage 10 V Cable length Current 20 mA shielded max. A defective C7 must therefore be replaced.Technical These general technical specifications include the standards with which the Specifications. C7 complies, the test values that it meets and the test criteria with which the C7 was tested. For more information about recycling and disposal of your old SIMATIC. Definition All electronic modules are equipped with large-scale integrated ICs or components. Due to their design, these electronic elements are very sensitive to overvoltages and thus to any electrostatic discharge. These Electrostatic Sensitive Devicesare commonly referred to by the abbreviation ESD. In this way, voltages up to 15000 V can build up whereas minor changes, i.e. up to 100 V, are not relevant. Most plastic materials have a away tendency to build up electrostatic charges easily. Provide Sufficient Make sure that the personnel, working surfaces and packaging are Grounding sufficiently grounded when handling electrostatically sensitive devices. You may also use metal-clad plastic boxes or metal cans. Packing Modules Always store ESD modules in conductive packing material.Reliability The reliability of SIMATIC devices and components is kept as high as possible by comprehensive procedures during development and manufacturing.
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With such applications, there are special, system-specific regulations to be taken into account when designing the control system (for example VDE 0116 for furnaces). The C7 OP has its own MPI address and is connected to the C7 CPU via the MPI. FMs generally use the internal bus for high-speed data exchange with the CPU. Examples of FM applications include counting, positioning, closed-loop control. Load Memory The load memory is a part of the C7 CPU. It contains objects (load objects) created by the programming device. The node number is assigned to the C7 CPU, C7 OP and programming device. There are two process images: the process image input table (PII) and the process image output table (PIQ). The process image input table is read by the input modules before execution of the user program. Substitute Value Substitute values are values that are output to the process or used in the user program in place of a process value in the event of a fault occurring in signal modules. The user memory is integrated into the C7 CPU as a flash memory. User Program The user program contains all the statements and declarations as well as data for signal processing by which a plant or process can be controlled. Please take the first available opportunity to fill out this questionnaire and return it to Siemens. Please give each of the following questions your own personal mark within the range from 1 (very good) to 5 (poor). Please try again.Please try your search again later.You can edit your question or post anyway.Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness. OEM solutions, down to turnkey products: Customized. Scripts. Introduction. Basic knowledge of SIMATIC WinCC is required to understand this manual. SITOP Power Supply. Process Control Systems (.

DCS). Process Control System SIMATIC PCS 7. Process Safety. An essentialAutomation. Potential Estimation. 2.1.1 Identification of Economic Tar- gets for Process Control. The starting points for any discussion are eco-. SIMATIC PDM - The Process Device Manager. Manuals (technicalProgram. Simatic S7-1200 controls a self-service car wash with six. Hans. Berger. Monitoring Functions. 8.Warning indicates that death, severe personal injury or substantial property damage can result if proper precautions are not taken. Caution indicates that minor personal injury or property damage can result if proper precautions are not taken. Note draws your attention to particularly important information on the product, handling the product, or to a particular part of the documentation. Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and systems in accordance with established safety practices and standards. Correct Usage ! Note the following: Warning This device and its components may only be used for the applications described in the catalog or the technical description, and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens. This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, and operated and maintained as recommended. Trademarks SIMATICR and SINECR are registered trademarks of SIEMENS AG. Third parties using for their own purposes any other names in this document which refer to trademarks might infringe upon the rights of the trademark owners. Copyright E Siemens AG 1997 All rights reserved Disclaimer of Liability The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages.

All rights, including rights created by patent grant or registration of a utility model or design, are reserved. We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, we cannot guarantee full agreement. However, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed. Siemens AG Bereich Automatisierungssystem Industrial Automation Systems Postfach 4848, D-90327 Nuernberg Subject to change without prior notice. Note The C7 consists of two independent units. - C7 CPU with C7 AS-i CP (in the C7-621 AS-i) and - C7 OP Where necessary, these components are dealt with separately. This controls the process to be visualized by the operator control and monitoring components of the C7. C7 CPU The way in which the C7 CPU operates is determined by the following components: Program Memory This contains the user program Processor The processor executes the program cyclically: S At the beginning of the cycle, the processor reads the signal states of all inputs and creates the process image input table (PII) S The program is executed step-by-step while referencing internal counters, memory bits and timers. S The processor stores the calculated signal states in the process image output table (PIQ). The signal states are then transferred to the outputs. The C7 CPU is independent of the C7 OP. The C7 CPU has its own MPI address and is connected to the C7 OP via the MPI interface. Programming Languages At present, there are three standard programming languages available for programming the C7 CPU: S STL: A statement list consists of a series of statements. Each statement in your program contains instructions in the form of mnemonics which represent a function for the C7 CPU to perform. S LAD: A ladder diagram is a graphical program language that resembles electrical circuit diagrams.
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S FBD: A function block diagram is a graphical programming language representing the logic in logic boxes familiar from Boolean algebra. Other optional programming languages include SCL and HiGraph. Devices STEP 7 runs on a programming device or PC. You can operate these devices independent of the C7. With the AS interface, this cable harness can be replaced by a simple common 2-wire cable for all sensors and actuators. The technical data and ordering information for AS-i actuators and sensors is listed in the Siemens Catalog ST PI. It occupies 16 input and 16 output bytes in the analog area of the controller. In this operation, the slaves are assigned the default value for the parameters (FH) saved on the CP. Parameters and commands cannot be transferred in standard operation. This type of operation is supported by a function (FC) that is supplied on a diskette with this manual. You can also enter information at the C7 that is written to the C7 CPU. You can also configure functions for machine diagnostics on the C7. The C7 provides a series of standard functions. You can adapt the displays and the operation of the C7 to the particular requirements of your process. C7 OP The C7 OP processes the operator control and monitoring functions of the C7. It is independent of the C7 CPU and continues to operate, for example, if the C7 CPU changes to the STOP mode. The C7 OP has its own MPI address and is connected to the C7 CPU via the MPI interface. Operator Control and Monitoring Functions The basic functions of a C7 are to display process states and control the process. The operator control and monitoring is flexible and is selected by the user and downloaded to the C7. The following display and operator functions can be configured for the C7: S Screens S Event messages S Multi-language operator menus Screens Logically related process data from the control system can be displayed together in one screen and modified individually as required.

A screen consists of several screen entries since, for example, the description of a machine state generally requires more related data than can be represented in one section of the display. This allows, for example, data about the operating temperature, tank level, rotational speed and run time to indicate the current machine state. The C7-621 and C7-621 AS-i systems have line-oriented displays. A screen consists of text elements made up of static text and current (dynamic) status values. Event Messages Event messages provide information and instructions for the operator relating to current machine or process states during normal operation. Event messages can contain process values. The representation of the process values can be either numeric or symbolic. They indicate, for example, operator errors or problems in communication. This type of message has the highest display priority. If a problem occurs on the C7, the currently displayed event message is cleared and a system message is displayed. Languages Message texts, screens, information texts and system messages can be displayed in several languages. This preparation is known as configuration. Configuration can be divided into three parts: S Control data S Assignment of parameters for the interface S Language selection Once this configuration has been created, it is downloaded to the C7 OP. For this step, the computer must be connected to the C7 via an MPI interface. Once the configuration has been downloaded to the C7 OP, the process management phase can be started after running a restart on the OP. The C7 OP then reacts to process signals from the C7 CPU or to operator input based on the configuration that has been loaded on it. The AS-i interface allows the connection of sensors and actuators to the C7-621 AS-i (Figure 1-2). The individual components operate independently of each other and each processor has its own memory. The software runs under Windows 95 on a programming device or PC.

During this test, it checks the functionality of the most important device components and indicates the test results with the status LEDs and on the display. The startup procedure is as follows: 1. The C7 runs a self test after POWER ON. 2. The C7 runs an operating system test for both sections (C7 CPU and C7 OP). If there is already a user program in the flash memory, the C7 CPU loads this program into the work memory. 3. During startup (1. and 2.), the C7 CPU remains in the STOP mode. After startup, the C7 OP is in the message mode. How you proceed from here depends on the situation on the C7: S No control program loaded. The control program must be loaded. S A control program is loaded. S No configuration loaded. S A configuration is loaded. The following sections explain what to do in each of the situations. Load Control Program To be able to control and monitor the process, the C7 OP must be able to access data on the C7 CPU. This means that you must first load a user program if no user program is present. No OP Configuration Loaded 2-2 If no configuration has been loaded, the screens in the firmware are activated in English. In this case you select the C7 OP mode in which you can transfer a configuration. A soon as the configuration is loaded, the message mode is set and the configured standby message is displayed. 6. You can now change to the following modes SIMATIC C7 C7-621 Vx.xx S C7 system function menu by pressing the two keys simultaneously S Screens by pressing OP Configuration Loaded SHIFT 0 ENTER If a configuration has already been loaded, you can start this by pressing the ENTER key and the configured “Start Screen” is displayed. If the standard screen or the function mentioned above is not available in the currently loaded configuration, you must remove the existing configuration using the memory reset function before you can load a new configuration. The user program cannot be downloaded or modified. The C7 CPU does not execute the user program.

Note: The STOP mode applies only to the C7 CPU. It does not apply to the C7 OP. You can still continue working with the C7 OP. Note: The MRES setting is not a momentary contact state and the MRES mode remains set. For the C7 CPU, the MRES mode is only a control mode. S If no key is activated within a time specified in the configuration (0 to 60 minutes), an automatic logoff is started (the current password level is reset to 0, the lowest level). S If no password for level 8 has been allocated, you can only modify the mode of the C7 CPU using the configured superuser password (default 100). 4. If the password is recognized as being valid, you can change the C7 CPU mode. It is not possible to modify the display. Any signal state changes between the scan points are not displayed. C7 OP Memory Reset The C7 must be turned off. The memory of the C7 OP has now been reset and the C7 OP starts up with the English default configuration. What Remains After a Memory Reset on the C7 OP. How to Reset the C7 CPU Memory The sequence of steps shown below explains how to reset the C7 CPU memory using the C7 CPU Mode system function. 1. Turn on the power for the C7 and wait until the startup tests are completed. If you wait longer than one second between STOP and MRES, no memory reset takes place. Note The content of the C7 CPU flash memory is not affected by a memory reset. What Remains After Resetting the C7 CPU Memory. After you have reset the C7 CPU memory, the following remains: S The content of the diagnostic buffer The content can be read out with a programming device. S The system diagnostics parameters S A user program with newly initialized data if this has been loaded from the flash memory. The chapter describes the languages you can use and the tools you require to program the C7 CPU. You can configure characteristics of the C7 CPU by assigning appropriate parameters.

Performance Characteristics of the C7 CPU C7 CPU Characteristic Work memory (integrated) Load memory (integrated) 12 Kbytes S 20 Kbytes RAM S 20 Kbytes for flash memory. The C7 CPUs also provide a series of test and reference data functions with which the status of the C7 CPU and the signal modules assigned to it can be queried. This means that you can obtain information about the following on the C7 CPU and the signal modules assigned to it: S The current configuration (degree of expansion) of the C7 S The current parameter assignments S The current states S The current sequences You can also modify process variables independent of the user program. Monitoring Functions The hardware and the operating system of the C7 CPU provide various monitoring functions. Any errors that occur are displayed with the SF LED and the cause of the problem is entered in the diagnostic buffer. The C7 CPU either changes to the STOP mode or you can react to the problem using error or interrupt OBs in the user program. For a detailed description of the reference data functions, refer to the user manual. Test Functions of the C7 Test Functions Application Status variable Selected process variables (inputs, outputs, bit memory, timers, counters, data) can be monitored at a selected point in the user program. Block status Monitoring a block in terms of the program sequence as an aid during installation and for troubleshooting. The C7 CPU also provides a run time meter that allows you to count the operating hours of the C7 CPU or a connected resource. You set and read the clock using the programming device (refer to the STEP 7 user manual) or you can program the clock in the user program with SFCs refer to the reference manual System and Standard Functions and Appendix B ). You program the run time meter in the user program once again using SFCs (see reference manual System and Standard Functions and Appendix B).

Characteristics Table 3-4 lists the characteristics and functions of the C7 CPU clock. When you assign parameters for the C7 CPU in STEP 7, you can also set functions such as synchronization and a correction factor. Since there is no backup for the C7 CPU, the clock does not continue to run when the power is turned off. The operating system of the C7 CPU is designed for event-driven user program execution. The following tables indicate which organization blocks (OBs) the operating system calls automatically for which event. For an overview of the STEP 7documentation, refer to Appendix D. C7 CPU Blocks Table 3-5 shows all the blocks that the C7 CPU can execute. Table 3-5 Block Number Range Maximum Size OB 12 - 8 Kbytes1 FB 128 0 - 127 8 Kbytes1 - 0 - 127 8 Kbytes1 - FC 1 Overview: C7 CPU Blocks 128 DB 127 1 - 127 8 Kbytes1 SFC 32 - - Comment There is a list of all possible OBs following this table. 0 is reserved Appendix A contains a list of all SFCs for the C7 CPU. OB 35 You can set intervals of 1 ms and higher for OB 35 (cyclic interrupt OB). If you set intervals less than 5 ms, then despite short program run times for the OB 35 program, cyclic interrupt errors can occur. Table 3-7 The priority of the OBs cannot be modified. OB 20 (time delay interrupt) C7 CPU Remains in RUN Without. OB 81 (Power supply fault) 3-13 Controlling with the C7 CPU 3.6 C7 CPU Parameters Selectable Characteristics of the C7 CPU You can assign parameters to specify the characteristics and response of the C7 CPU. You assign parameters in STEP 7 in various tab pages (refer to the STEP 7 documentation and online help ofSTEP 7). When does the C7 CPU “Adopt” the Parameters. The C7 CPU adopts the selected parameters (configuration data) S After POWER ON S After correct transfer of the parameters to the C7 CPU online in the STOP mode S After a memory reset on the C7 CPU (see Section 2.

4): If the integrated flash memory of the C7 CPU contains configuration data, these are loaded with the exception of the MPI parameters. ! 3-14 Caution After saving the program in the flash memory of the C7 (STEP 7: “Copy RAM to ROM”), parameter settings with the exception of the MPI parameters are lost the next time memory is reset. Limiting the cycle load can slow down communication between the C7 CPU and a programming device or between communicating C7 CPUs. The operating system services such as collection and preparation of data for communication are not affected. Range of Values Default Setting From 10 to 50 20 From 1 to 6000 150 Functions that demand that data are read without interruptions slow down program execution regardless of the value set for this parameter. Example: Block status, reading out system data. Scan Cycle Monitoring (in ms) If the scan cycle exceeds the “Scan Cycle Monitoring”, the C7 CPU changes to the STOP mode. The “Scan Cycle Monitoring” can be exceeded, for example due to the following: S Communication processes S Large numbers of interrupts S Errors in the user program (for example endless loops). This self test takes up additional cycle time. The period is shown in Figure 3-1. Clock Pulse Period Figure 3-1 shows the period and the corresponding frequency of clock pulses generated by the “Clock Pulse Byte”. Memort byte Bit Period corresponds to frequency 7 6 5 4 3 2 1 0 0.1 sec. corresponding to 10 Hz 0.2 sec. corresponding to 5 Hz (flickering light) 0.4 sec. corresponding to 2.5 Hz (fast flashing) 0.5 sec. corresponding to 2 Hz 0.8 sec. corresponding to 1.25 Hz (flashing) 1.0 sec. corresponding to 1 Hz 1.6 sec. corresponding to 0.625 Hz (slow flashing) 2 sec. S Transfer of parameters Maximum time for “distributing” the parameters to modules (in ms) S Ready message from modules (in ms) Tip to the modules within the rack. Maximum time for the ready message from all modules after power on.

If the modules do not send a ready message during this time to the C7 CPU, the C7 CPU remains in the STOP mode. Select the largest values for the parameters “Monitoring Time For.” if you are unsure of the times required in the C7 CPU. Definition: System Diagnostics System diagnostics involves the acquisition, evaluation and signaling of an error within the programmable controller. System diagnostics is also responsible for monitoring the wiring to the process so that, for example, a wire break can be recognized by the system diagnostics. Example Examples of errors that can be identified, evaluated and signaled by system diagnostics are as follows: S Errors in the user program S Module failures “System Diagnostics” Field Table 3-12 Table 3-12 lists the parameters of the “ System Diagnostics” parameter field. This diagnostic message is the “newest” entry in the diagnostic buffer. Undetected Errors 3-18 Errors that occur in the process, in other words outside the programmable controller, are not detected by system diagnostics. Such errors for example include “Motor Defective”. Errors of this type belong to process error diagnostics. The non-retentive area for bit memory, timers and counters is reset following a power outage and the transition from STOP to RUN. The following can be retentive: S Bit memory S S7 timers S S7 counters S Data areas (only with an integrated EPROM) What is Retained. The areas that you specify in the “Retentive Memory” parameter field are retained following a power outage and the transition from STOP to RUN (without battery backup). Retention of Data Blocks Note the following points about data blocks: S All DBs (retentive, non-retentive) are transferred from the integrated EPROM to the work memory during startup. S Retentive data areas are retained after a power outage. Note: These data areas are stored on the C7 CPU. The non-retentive data areas contain the values programmed in the EPROM.