System And Operating States Of The Cpu 410; Cpu 410 Operating Modes; Run Mode - Siemens SIMATIC CPU 410 System Manual

System and operating states of the CPU 410

7.1

CPU 410 operating modes

7.1.1

RUN mode

Reaction of the CPU
If there is no startup problem or error and the CPU was able to switch to RUN, the CPU
either executes the user program or remains idle. The I/O can be accessed.
● You can read out programs from the CPU with the ES (CPU -> ES).
● You can transfer programs from the ES to the CPU (ES -> CPU).
The user program is executed by at least one CPU in the following system states:
● Stand-alone operation
● Single mode
● Link-up, update
● Redundant
Single mode, link-up, update
In the system states solo mode, link-up and update, the master CPU is in RUN and executes
the user program in stand-alone mode.
Redundant system mode
The master CPU and standby CPU are always in RUN when operating in the redundant
system state. Both CPUs execute the user program in synchronism, and perform mutual
checks.
In redundant system mode it is not possible to test the user program with breakpoints.
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
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