Mode Selector - Siemens SIMATIC NET S7-300-PROFIBUS CP 342-5 Equipment Manual

2.2

Mode selector

Controlling the mode
There are different ways in which you can control the operating status of the CP, as follows:
• Mode selector
• STEP 7 configuration software:
– SIMATIC Manager / menu command: PLC > Display Accessible Nodes
– NetPro / menu command: PLC > Operating Mode...
– HW Config / menu command: PLC > Operating Mode...
– NCM Diagnostics / menu command: Operating Mode
To control the CP mode from STEP 7, the mode selector must be set to RUN.
Mode selector
With the mode selector, you can set the following modes:
• Change from STOP to RUN
The CP enters the configured and/or loaded data in the work memory. The CP then
changes to STOP.
Diagnostics of the CP is possible.
• Change from RUN to STOP
The CP changes to STOP with the following response:
– Established connections (FDL and S7 connections) are terminated.
– Configuration and diagnostics of the CP are possible.
– The following applies to DP mode:
Further information
Read the explanations relating to the topic of "Downloading the configuration to the target
system" in the /1/ (Page 53) manual.
CP 342-5
Equipment Manual, 01/2023, C79000-G8976-C146-11
- DP slave mode: The CP is no longer in data transfer.
- DP master mode: the mode is "OFFLINE".
Note
Longer transition times in complex systems
Depending on the extent of the configuration, it can take up to 1 minute before the CP
reaches the "OFFLINE" mode.
LEDs and mode selector
2.2 Mode selector
31