Siemens OP7 Equipment Manual page 87

STATUS/FORCE VAR with the OP
Purpose
The operator panel offers you the two functions STATUS VARand FORCE
VAR which enable you to display and modify operand values from the con-
nected SIMATIC S5/S7/M7 PLC via standard screens.
In online mode, this means that PLC operands can be edited directly on the
OP without having to connect a programming unit/PC to the PLC.
STATUS VAR
You can use STATUS VAR to display the status of operands of a
SIMATIC S5/S7/M7.
FORCE VAR You can use FORCE VAR to control operands of a SIMATIC S5/S7/M7 by
modifying their tag values and transferring them back to the PLC.
After calling the STATUS VAR and FORCE VAR functions, the OP prompts
you to enter the MPI or PPI address, respectively.
Equipment Manual OP7, OP17
Release 04/99
9
9-1