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Parameters of the RDREC instruction
Below, you will find explanations of individual parameters of the RDREC instruction which
you must supply with specific values in the configuration control context. You can find
additional information on the RDREC instruction in the STEP 7 online help.
ID
INDEX
RECORD
In case of an error, the RDREC instruction returns the following error messages through the
STATUS block parameter:
Table 8- 5
Error code
80B1
80B5
80B8
Special requirements relating to the transfer of the control data record
● If you have enabled configuration control, the HCS 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 CIM continues to be in data exchange.
● The control data record is stored retentively in the CIM. Note:
– If there have been no changes to the configuration, you do not need to rewrite the
– When you write a control data record to the CIM for the first time or with modified
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
Hardware identifier
Data record number: 197 (decimal)
Feedback data record to read
For the structure of the control data record, see table (Page 95).
Error message RDREC
Meaning
Invalid length; the length information in data record 197 is not correct.
H
Configuration control not configured
H
Parameter error
H
The following events cause a parameter error:
Incorrect block ID in the header (not equal to 197)
•
Invalid version identifier in the header
•
A reserved bit was set
•
Multiple slots in the station master are assigned to the same slot in the station
•
option
control data record 196 during restart.
configuration, it results in a reset of the HCS (station failure). 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.
Configuring/Programming
8.5 Configuration control
99
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