Behavior During Operation - Siemens Simatic S7-1500/ET 200MP System Manual

Special requirements relating to the transfer of the control data record to the interface module
● If you have enabled configuration control, the ET 200MP station is not ready for operation
without a control data record. As long as no valid control data record has been
transferred, the I/O modules are considered as failed by the CPU and exhibit substitute
value behavior. The interface module continues to exchange data.
● The control data record is stored retentively in the interface module. Note:
– If the configuration is unchanged, you do not have to rewrite the control data
– If you write a control data record with modified configuration, this will result in a station
10.2.4

Behavior during operation

Effect of discrepancy between station master and station option
For the online display and for the display in the diagnostics buffer (module OK or module
faulty), the station master is always used and not the differing station option.
Example: A module outputs diagnostics data. This module is configured in slot 4 in the
station master, but is inserted in slot 3 in the station option (missing module; see example in
the next section). The online view (station master) shows an incorrect module in slot 4. In the
real configuration, the module in slot 3 indicates an error via an LED display.
Response to modules that are not present
If modules are entered as not present in the control data record, the automation system
behaves as follows:
● Modules designated as not present in the control data record do not supply diagnostics
and their status is always OK. The value status is OK.
● Direct writing access to the outputs that are not present or writing access to the process
image of outputs that are not present: Remains without effect; no access error is
signaled.
● Direct reading access to the inputs that are not present or reading access to the process
image of inputs that are not present: Value "0" is supplied; no access error is signaled.
● Write data record to module that is not present: Remains without effect; no error is
signaled.
● Read data record from module that is not present: The output parameter STATUS of the
instruction RDREC supplies the value 80A3
Automation system
System Manual, 12/2017, A5E03461182-AE
record 196 during restart.
failure in the distributed I/O system. The original data record 196 is deleted and the
new data record 196 is saved retentively. The station will then restart with the modified
configuration.
Flexible automation concepts
10.2 Configuration control (option handling)
"General CM error".
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