Siemens CPU 1518-4 PN/DP ODK User Manual

Parameter data records
B.4 Parameter assignment and structure of the parameter data records of the digital on-board I/O
CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
158 Manual, 09/2016, A5E35306440-AB
B.4
Parameter assignment and structure of the parameter data records
of the digital on-board I/O
Parameter assignment in the user program
You have the option of reassigning parameters for the digital on-board I/O in RUN (for
example, values for input delay of individual channels can be modified in RUN without
affecting the other channels).
Changing parameters in RUN
The parameters are transferred to the digital on-board I/O via data records 0 to 15 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 only checked for plausibility after the transfer.
Output parameter STATUS
If errors occur when transferring parameters with the "WRREC" instruction, the digital 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.
B.5
Structure of a data record for input channels of the digital
on-board I/O
Assignment of data record and channel
The parameters per submodule for the 32 digital input channels are located in data records 0
to 15 and are assigned as follows:
First submodule (X11):
● Data record 0 for channel 0
● Data record 1 for channel 1
● …
● Data record 14 for channel 14
● Data record 15 for channel 15
Second submodule (X12):
● Data record 0 for channel 0
● Data record 1 for channel 1
● …
● Data record 14 for channel 14
● Data record 15 for channel 15

Siemens CPU 1518-4 PN/DP ODK Specifications

General

Brand	Siemens
Model	CPU 1518-4 PN/DP ODK
Category	Controller
Language	English