CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
166 Manual, 12/2017, A5E40898741-AA
Parameter assignment and structure of the parameter data records
of the analog on-board I/O
Parameter assignment in the user program
You have the option of reassigning parameters for the analog on-board I/O in RUN (for
example, measuring ranges of individual channels can be modified in RUN without affecting
the other channels).
Changing parameters in RUN
The parameters are transferred to the analog on-board I/O via data records with the WRREC
instruction. The parameters set with STEP 7 (TIA Portal) are not changed in the CPU, which
means the parameters set in STEP 7 (TIA Portal) will be valid again after a restart.
The parameters are checked for plausibility by the analog on-board I/O only after the
transfer.
If errors occur when transferring parameters with the "WRREC" instruction, the analog on-
board I/O continues operation with the previous parameter assignment. However, a
corresponding error code is written to the STATUS output parameter.
You will find a description of the "WRREC" instruction and the error codes in the STEP 7
(TIA Portal) online help.
Structure of a data record for input channels of the analog on-
board I/O
Assignment of data record and channel
The parameters for the 5 analog input channels are located in data records 0 to 4 and are
assigned as follows:
● Data record 0 for channel 0
● Data record 1 for channel 1
● Data record 2 for channel 2
● Data record 3 for channel 3
● Data record 4 for channel 4
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