Function Block Fb156(Per:wpa); Function Description; Calling The Function Block - Siemens SIMATIC S5 Equipment Manual

Programming Instructions
Function Block FB 156 (PER:WPA)
9.2

9.2.1 Function Description

The function block "parameterize position decoder" supplies the module with the initial and final
track setpoints for both channels including the zero shift. If necessary the interrupt identifier bits
are set.
The data to be transferred is stored in a user data block. The required data must be entered there
by the user prior to calling the function block.
Prior to parameter assignment, the data on the module is deleted. The firmware contents are read
and entered into the data block.
In the S5–115U, the function block is usually called by organization block OB20 (or OB21 pro-
grammable controller S5–115U) if there is a cold restart.
Function
Transfer of the specified setpoints from the user data block to the digital position decoder module

9.2.2 Calling the Function Block

In the STL (Statement List):
S5-115U
NAME :PER:WPA
:
:
S5–135U
S5–155U
NAME :PER:WPA
P/Q :
:
:
9 – 2
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In the LAD/CSF (Ladder Diagram/
Control System Flow Chart)
FB 156
FB 156