Writing And Forcing Outputs In Stop Mode - Siemens SIMATIC S7 System Manual

You can use the status chart to force values.
1. To force a new value, enter the value in the New Value column of the Status Chart, then
click the Force button
column and select "Force" from the context menu.
2. To force an existing value, select the value in the Current Value column and click the
Force button
column and select "Force" from the context menu.
The status LEDs (Page 101) indicate whether the CPU has any forced data.
10.5

Writing and forcing outputs in STOP mode

To enable Write and Force functions while in STOP mode, click the "Force in Stop" button
from the Settings area of the Debug menu ribbon strip.
The S7-200 SMART PLCs support writing and forcing outputs (both analog and digital) while
the PLC is in STOP mode. However, as a safety precaution, you must specifically enable
this functionality in STEP 7-Micro/WIN SMART with the "Force in Stop" setting.
Effect on process equipment of writing or forcing outputs
If you have connected the S7-200 SMART PLC to process equipment when you write or
force an output, the PLC can transmit these changes to the equipment. This could result in
unanticipated activity in the equipment, which could cause death or serious injury to
personnel, and/ or property damage.
Only write or force outputs when your process equipment can safely accept those changes.
By default, STEP 7-Micro/WIN SMART does not enable "Force in STOP". STEP 7-
Micro/WIN SMART prevents you from writing or forcing outputs while the PLC is in STOP
mode. Clicking the "Force in STOP" button from the Debug menu enables writing and forcing
for the current editing session with the current project. When you open a different project,
"Force in STOP" returns to its default state and STEP 7-Micro/WIN SMART prevents you
from either writing or forcing output addresses while the PLC is in STOP mode.
The status LEDs (Page 101) indicate whether the CPU has any forced data in STOP mode.
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
on the status chart toolbar, or right-click the value in the Current Value
WARNING
10.5 Writing and forcing outputs in STOP mode
on the status chart toolbar, or right-click in the New Value
Debugging and troubleshooting
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