Siemens SIMATIC S7-400 Reference Manual page 367

Mode selector
You can switch operating modes as follows using the mode selector:
● From STOP to RUN
All the configured communication services and S7 communication services are available
in RUN.
The IM operating mode can only be controlled from the programming device/PC when the
switch is in the RUN position.
● From RUN to STOP
The IM goes into STOP mode. Any existing S7 connections are cleared down, and the DP
slaves are no longer supplied.
Loadable firmware
The IM 467/IM 467 FO supports the updating of firmware (FW) by means of the FW loader.
The FW loader is a component of the NCM S7 configuration software for PROFIBUS DP.
Authorization is not required for this. After a FW update, the central rack must be switched off
and on again before normal operation can be resumed.
Note
You can find additional information on loading firmware in the
manual and in the readme file of the
An optical bus terminal (OBT) is required to load FW in the IM 467 FO.
S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08
PROFIBUS DP master interface IM 467/IM 467 FO
8.1 PROFIBUS DP master interface IM 467/IM 467 FO
NCM S7 for PROFIBUS-DP configuration software.
NCM S7 for PROFIBUS-DP
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