Performing The First Function Test - Siemens SIMATIC S7-200 Manual

3.3

Performing the first function test

To perform the first function test, follow the steps below:
1. Set the mode selector of the PLC to the TERM or RUN position. The mode selector is
located behind the small cover at the front side of the CPU.
Note that remote control of the operating mode (RUN or STOP) is possible only in the
TERM or RUN position.
2. From the PC, switch the S7-200 to STOP mode and back to RUN.
The green RUN LED on the PLC lights up in RUN mode. The yellow STOP LED on the
PLC lights up in STOP mode. If you can switch the PLC operating modes from the PC,
the connection between the PC and PLC is configured correctly.
If the mode does not change, check the connecting cable between the PC and PLC and
the communication settings within STEP 7-Micro/WIN.
Getting Started - Beginners
Training Documents, 07/2007, A5E01031470B
Basic settings
3.3 Performing the first function test
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