show the entry list
ES - SIMATIC Manager -- Creating programs -- CFC - Using block libraries
What are the system requirements for using SIMATIC PCS 7 Industry Library?
What should you watch out for when changing the symbolic addresses of input/output modules?
Why are the inputs of the driver block in the CFC chart no longer interconnected after replacing a HART analog module?
How do you parameterize the PCS 7 APL channel driver so that the output process value is inverted?
How do you configure a Modbus slave using the "RCV_341" (FB 121) PCS 7 block?
Why do I get the signal "QBAD" on my "CH_AI" driver block?
How do you configure the "Sample_T" input?
Why is the module INT_P issuing invalid values at the output?
Why isn’t the CH_AI block not interconnected automatically with the option "Create module driver"?
How can I change the preset message class in standard blocks?
Can blocks from the CFC library for the S7-300 CPUs also be used in a program for an S7-400 CPU?
What is the meaning of the block input VALUE_QC of the CH_DI block?
Why is the simulated value not output on the CH_AI driver block and how can a value still be simulated?
When do you speak of a "self-regulating process" and when of a "non-self-regulating process"?
How do you do perform controller optimization with the PCS 7 PID tuner?
What is the meaning of the parameters "GAIN", "TN" and "TV" with the CTRL_PID block?
Why is there only half the expected current output from each of the analog output modules in the case of redundant modules?
How much memory is used by the SIMATIC PCS 7 V6.0 library blocks and templates in the PLC?
What do I have to take into account to avoid that the actual value overshoots when switching over from hand/track operation to automatic operation of the "CTRL_PID" with activated setpoint ramp?
How can additional message texts - only as event and OS range - be edited in a block that supports messages in SIMATIC PCS 7 V5.x?
When generating the module drivers, how can you clear the message "Necessary files are missing for block CH_AI. Please note that you must install exactly that version of the library from which this block was imported"?
Why does the CH_AI driver report the slave still to be defective (QBAD=1) after failure and return of a PROFIBUS DP slave (e.g. ET 200M)?
How do you interconnect an FM350-2 in PCS 7?
How can you clear the error message "Value BITVAL is not defined in file AL_CHN.xml / CH_DI." in the module driver log?
Why does the CH_AI driver report the slave still to be defective (QBAD=1) after failure and return of a PROFIBUS DP slave (e.g. ET 200M)?
Part number:

Description
One possible cause is that the properties of the CPU were wrongly set. Therefore, you should check in the HW Config under "Properties of the CPU > Tab: Cycle/Clock Memory > parameter "OB85 call upon I/O access error", whether "Only for incoming and outgoing errors" is set and change the setting if necessary.
This is the only way to make sure that the I/O access error (output parameter QPERAF) is evaluated correctly. Furthermore, you save cycle time, because repeated calling of the OB 85 can increase the cycle time.

This setting is absolutely mandatory when using the SIMATIC PCS 7 driver concept! Please also refer to Entry ID: 10331925.

Remark
With SIMATIC PCS 7 version V6.0, this is a default setting in the HW Config for all PCS7 projects.

 Entry ID:17581786   Date:2010-06-28 
I regard this article....as helpfulas not helpful                                 
mySupport
My Documentation Manager 
Newsletter 
CAx-Download-Manager 
Support Request
To this entry
Print
Create PDF 
Send to a friend
QuickLinks
Compatibility tool 
Topics
Help
Online Help
Guided Tour