Siemens SIMATIC ET 200AL, System Manual

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Configuration control (option handling)
7.4 Transferring the control data record in the user program of the CPU
Distributed I/O system
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Special requirements relating to the transfer of the control data record to the interface module
• If you have enabled configuration control, the ET 200AL 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
record 196 during restart.
– If you write a control data record with modified configuration, this will result in a
station 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.
Error messages
In case of error, the WRREC instruction returns the following error messages via the STATUS
block parameter:
Table 7- 5 Error messages
Error code Meaning
80B1
H
Invalid length; the length information in data record 196 is not correct.
80B2
H
Invalid slot: The configured slot is not assigned
80B5
H
Configuration control parameters not assigned.
80B8
H
Parameter error
Reasons for a parameter error are:
•
Incorrect block ID in the header (not equal to 196)
• Invalid version identifier in the header
• A reserved bit was set
• A station master slot was assigned an invalid slot in the station option
• Multiple slots in the station master are assigned to the same slot in the sta-
tion option
• For shared device on submodule level: violation of defined restrictions
80C5
H
DP slave or module not available. Indicates that a data record has not been
acknowledged due to the system.
If you receive the error code 80A2
H
, 80B2
H
or 80C5
H
when writing to control data record 196,
check whether the required configuration was accepted despite the error code.