Parameter Data Records; Parameter Assignment And Structure Of The Parameter Data Record For Dq Operating Mode - Siemens SIMATIC ET 200SP Manual

Parameter data records

A.1 Parameter assignment and structure of the parameter data record
for DQ operating mode
Parameter assignment in the user program
You can reassign the parameters of the module in RUN. For example, the reaction to CPU
STOP of individual channels can be changed in RUN without this having an effect on the
other channels.
Changing parameters in RUN
The "WRREC" instruction is used to transfer the parameters to the module using data record
128. The parameters set in STEP 7 are not changed in the CPU, which means the
parameters set in STEP 7 are valid again after a restart.
Note
Changing parameters in RUN
A parameter data record that has content different from the startup parameter assignment
can result in a brief exit from clocked mode and renewed synchronization with the fieldbus
cycle.
Note
Changing parameters in RUN
When parameters are reassigned in RUN, a brief signal failure can occur at the output. For
this reason, reassignment of parameters in RUN should be done when a 0 is being output at
the output.
STATUS output parameter
The module ignores errors that occur during the transfer of parameters with the "WRREC"
instruction and continues operation with the previous parameter assignment. The STATUS
output parameter contains a corresponding error code.
The description of the "WRREC" instruction and the error codes is available in the STEP 7
online help.
Digital output module DQ 4x24VDC/2A HS (6ES7132-6BD20-0DA0)
Manual, 06/2018, A5E32855695-AC
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