Reset During Operation - Siemens SIMATIC CPU 410 System Manual

LED
RUN
STOP
9.9

Reset during operation

CPU operating state
The following procedure references the RED or RUN RED operating state.
Note
If you perform a reset to prevent a malfunction of the CPU, you should read out the
diagnostics buffer and the service data before the reset with the menu command "PLC ->
Save service data".
Reset procedure during operation
Press and hold down the Reset button for 5 seconds. The CPU generates the current
service data and writes the event W#16#4308 ("Memory reset started by switch operation")
to the diagnostics buffer. The CPU then switches back to RUN.
Reset in stand-alone operation with restart
Note
During Power On with battery backup of a fault-tolerant system with large configurations,
many CPs and/or external DP masters, it may take up to 30 seconds until a requested
restart is executed. During this time, the LEDs on the CPU light up successively as follows:
1. All LEDs light up
2. The STOP LED flashes as it does during a memory reset
3. The RUN and STOP LEDs are flashing
4. The RUN LED flashes briefly 2 to 3 times
5. The STOP LED lights up
6. The RUN LED starts flashing again.
This begins the start up.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
LED pattern 1
Dark
Dark
Special functions of the CPU 410
9.9 Reset during operation
LED pattern 2
Dark
Dark
143