Special functions of the CPU 410
9.9 Reset during operation
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
143
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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 sh
ould read out the
diagnostics buffer and the service data before the reset with the menu command "PLC
->
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:
All LEDs light up
The STOP LED flashes as it does during a memory reset
The RUN and STOP LEDs are flashing
The RUN LED flashes briefly 2 to 3 times
The STOP LED lights up
The RUN LED starts flashing again.
This begins the start up.
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