Stop Mode - Siemens SIMATIC PCS 7 CPU 410-5H System Manual

7.1.2

STOP mode

Reaction of the CPU
The CPU does not execute the user program. The digital signal modules are disabled. The
output modules are disabled in the default parameter settings.
● You can upload programs from the CPU to the programming device (CPU ->
Programming device).
● You can download programs from the programming device to the CPU (Programming
device -> CPU).
Special features in redundant mode
When you download a configuration to one of the CPUs while both are in STOP operating
state, observe the points below:
● Start the CPU to which you downloaded the configuration first in order to set it up for
master mode.
● If the system startup is requested from the ES, the CPU to which an active connection
exists is started first, regardless of the master or standby status. Then the second CPU
starts up and will become the standby CPU after link-up and update operations.
Note
A system startup may trigger a master–standby changeover.
A CPU 410 can only exit the STOP operating state with a loaded configuration.
Memory reset
The memory reset function affects only the selected CPU. To reset both CPUs, you must
reset one and then the other.
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
Operator controls and operating modes of the CPU 410-5H
7.1 Operating modes of the CPU 410-5H
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