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Entries per page: 20 50 100
FAQ How do you do perform controller optimization with the PCS 7 PID tuner?

It is possible to optimize controllers using the commissioning tool "PCS 7 PID Tuner". The tool makes measurements to determine the process parameters and then suggests the optimum settings for the controller. If required, you can apply these settings immediately.

ID: 8031495
FAQ How do you monitor a block with the desired call environment in STEP 7?

Instructions When a block is called multiple times, there is a way of monitoring the block at a specific call. Proceed as follows to monitor a block with the desired call environment. ...

ID: 21671563
FAQ Why do I get a license error message in SIMATIC PDM although all the necessary licenses are available?

Description: A license error message from SIMATIC PDM can basically have three reasons: Authorizations are available, but are not recognized. This is extremely rare. In this case you have to play the licenses back to the floppy disk, restart the computer and transfer the licenses back again from the floppy disk to the computer. The license for SIMATIC PDM is indeed available, but it is not the right version. The license fo ...

ID: 10678936
FAQ How do I open the configuration dialog box of CCAgent, if the icon is not shown in the task bar (PCS 7 V6.x)?

Description:   The application CCAgent is a help to the administration of the communication between internconnected WinCC-Stations and is part of the WinCC-Option NetCC.  ...

ID: 16527934
FAQ How do you program the ANY parameters for SFC14 and SFC15 in S7-SCL?

In S7-SCL and in the LAD/FBD/STL editor, it is not possible to declare a variable of the data type ANY in a UDT or in a DB, because the ANY variable is a parameter type. However, you can declare an ANY variable as a temporary variable.

ID: 10625180
FAQ What do the PCS7 process control messages "Failure Connection ID: 16#0" and "Failure Connection ID16#??" indicate and how can they be avoided?

Initial situation Every time WinCC Runtime is deactivated on an operator station, the process control message 'Failure Connection ID16#x' is generated by the CONEC block (FB88). The 'x' in this message stands for the connection ID configured in the SIMATIC Manager. ...

ID: 35113846
FAQ Tips and tricks for loading and testing S7 programs

Instructions This entry includes a number of tips and tricks for loading and testing the S7 programs. Why are the events of the diagnostics buffer only displayed in HEX format in Windows 2000? Why is the Download button grayed out in the selected block folder? How can you monitor the actual values of the OUT variables that have been parameterized with a PQW (peripheral output word)? ...

ID: 19267653
FAQ What should you do when you get the message "Object attribute not found" after upgrading to a PCS 7 V7.0 project?

Description: After upgrading of an older PCS 7 project to PCS 7 V7.0, it might happen that the setting of the chart installation pointer in CFC is lost. ...

ID: 38849185
FAQ How do you obtain detailed information about compilation errors?

Instructions: Through PCS 7 V6.1 SP1 the SCL source '@SCLFileFromCFC_SFC_1' is created each time the user program is compiled. From PCS 7 V7.0 this source is only created if the 'Generate SCL source' check box is checked in the 'Compile program' dialog window. If this source already exists, it is overwritten. The source is located in the SIMATIC Manager under 'Project > SIMATIC...> S7 Program... > Sources'. ...

ID: 19250828
FAQ What is the difference between offline and online processing in the LAD/STL/FBD editor?

Configuration Notes: During the test phase or commissioning it is often necessary to make minor changes to the blocks. If the associated user program is on a programming device, there are always two different procedures for making changes. ...

ID: 17376617
FAQ Why is the update of the data in the user program of the CPU different in central and distributed mode?

Description: The differences result from the runtimes that are necessary to supply the data. Whereas in central mode the CPU can directly access inputs, in distributed mode (analog and digital modules which are topologically separated from the central rack), the data is to be supplied by the PROFIBUS interface module. In this case it does not matter if the PROFIBUS interface module is integrated into the CPU or if a CP is used. ...

ID: 19150403
FAQ How is routing done via MPI between two CPU modules in the case of a divided rack of an S7-400?

Instructions: A STEP 7 project with a divided rack and two CPU modules have been configured as an example: ...

ID: 18847528
FAQ How do you use the standard function "AXC_SetFilter()"?

This FAQ response shows you how to set a filter for the WinCC Alarm Control.

ID: 25287778
FAQ How can you signal messages acoustically?

Instructions: The 'Horn' editor is for configuring the acoustic output of alarm-relevant events on signal modules and PC sound cards. The Horn editor is a component of the WinCC option 'Basic Process Control'. The 'Basic Process Control' has been available by default without additional license check since WinCC V6.0. ...

ID: 24845317
FAQ Why does the network status only appear partially during monitoring in the LAD and FBD editor?

  Description: The table below describes the reasons why part of the program does not appear on the display of the PG or PC during monitoring in the LAD and FBD editor and why the network status is only partly displayed, as well as remedies for this: ...

ID: 11013485
FAQ How can you change the startup and actual values only via the OP in such a way as to be immune to power failure and general reset?

Instructions: In the SIMATIC Manager you can use the menu command 'PLC > Copy RAM to ROM...' to write a data block from the main memory to the load memory. In this way changed parameters are available again in this data block, even after Power Off, for example. ...

ID: 14493983
FAQ How can you modify variables in STEP 7 version V5.2 and higher?

Instructions: It is possible to modify operands both in the Online view of the LAD/FBD/STL editor and via the variables table. In order to modify variables in the LAD/FBD/STL editor you can distinguish between the STL view and the LAD/FBD view.  ...

ID: 22897211
FAQ How are the Windows security settings (DCOM settings) defined for SIMATIC Logon?

Instructions: If you use the 'Log on to: another computer with SIMATIC Logon' function, define the following settings exclusively on the computer from which the data is taken: ...

ID: 22680930
FAQ How do you avoid the error message "Error when copying project data to target system." when downloading a WinCC configuration to the Operating Station (OS)?

This error message that occurs when downloading a configuration may have different causes. In the following we explain three possible scenarios and solutions for clearing them.

ID: 22019649
FAQ How you can increment/decrement a variable value in the runtime via a button

You can use the OCX "SpinButton" for this function. Below is a description of how to incorporate and interconnect this object.

ID: 19730300
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