Manual VIPA CPU 21x Chapter 3 Deployment CPU 21x
HB103E - Rev. 05/45 3-21
This test function returns the condition of a selected operand (inputs,
outputs, flags, data word, counters or timer) at the end of program
execution.
This information is obtained from the process image of the selected
operands. During the "processing check" or in operating mode STOP the
periphery is read directly from the inputs. Otherwise only the process
image of the selected operands is displayed.
Control of outputs
It is possible to check the wiring and proper operation of output modules.
You may set outputs to any desired status with or without a control
program. The process image is not modified but outputs are no longer
inhibited.
Control of variables
The following variables may be modified:
E, A, M, T, Z, and D.
The process image of binary and digital operands is modified independen-
tly of the operating mode of the CPU 21x.
When the operating mode is RUN the program is executed with the
modified process variable. When the program continues they may,
however, be modified again without notification.
Process variables are controlled asynchronously with respect to the exe-
cution sequence of the program.
PLC >
Monitor/control
variables
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