Download Siemens S7-400PLC Specifications

A
Parameter sets of signal modules
A.1
How to assign the parameters for signal modules in the user program
Parameter assignment in the user program
You have already assigned parameters to the modules in STEP 7.
In the user program, you can use an SFC:
● To assign new parameters to the module
● To transfer the parameters from the CPU to the addressed signal module
Parameters stored in data records
The signal module parameters are stored in data records 0 and 1.
Modifiable parameters
You can edit the parameters of data record 1, and then transfer these to the signal module
using SFC55. The CPU parameters are not changed by this action!
You cannot modify any parameters of data record 0 in the user program.
SFCs for parameter assignment
SFCs available for programming signal modules in the user program:
Table A- 1
SFCs for assigning parameters to signal modules
SFC No.
Identifier
Application
55
WR_PARM
Transfer modifiable parameters (data record 1) to the addressed
signal module.
56
WR_DPARM
Transfer parameters (data record 0 or 1) from the CPU to the
addressed signal module.
57
PARM_MOD
Transfer all parameters (data record 0 and 1) from the CPU to
the addressed signal module.
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
411