315-4PN33
Event-ID Description
0xEFFF Internal error - Please contact the VIPA Hotline!
PK: C-Source module number | DatID: Line number
5.19 Control and monitoring of variables with test functions
For troubleshooting purposes and to display the status of certain vari-
ables you can access certain test functions via the menu item Debug
of the Siemens SIMATIC Manager.
The status of the operands and the RLO can be displayed by means
of the test function ‘Debug è Monitor
’.
You can modify and/or display the status of variables by means of the
test function ‘PLC è Monitor/Modify Variables’.
This test function displays the current status and the RLO of the dif-
ferent operands while the program is being executed.
It is also possible to enter corrections to the program.
When using the test function “Monitor” the PLC must be in
RUN mode!
The processing of the states may be interrupted by means of jump
commands or by timer and process-related alarms. At the breakpoint
the CPU stops collecting data for the status display and instead of the
required data it only provides the PG with data containing the value 0.
For this reason, jumps or time and process alarms can result in the
value displayed during program execution remaining at 0 for the items
below:
n the result of the logical operation RLO
n Status / AKKU 1
n AKKU 2
n Condition byte
n absolute memory address SAZ. In this case SAZ is followed by a
"?".
The interruption of the processing of statuses does not change the
execution of the program. It only shows that the data displayed is no
longer.
This test function returns the condition of a selected operand (inputs,
outputs, flags, data word, counters or timers) 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
Overview
‘Debug è Monitor’
‘PLC
è Monitor/Modify
Variables
’
VIPA System 300S Deployment CPU 315-4PN33
Control and monitoring of variables with test functions
HB140 | CPU | 315-4PN33 | GB | 14-43 81