Plant changes during redundant operation - H-CiR
12.8 Adding components
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
209
The next steps, except for changing and loading the user program, are performed by the H-
CiR wizard.
Reaction of the I/O to the new master CPU
While the previous master CPU is still in STOP, the I/O reacts to the new master CPU as
follows:
One-sided I/O of the
previous master CPU
One-sided I/O of the new
master CPU
Added I/O mod-
ules
Not yet accessed by the
CPU.
Configured and updated by the CPU.
Driver blocks are not yet available. Any occurring
process or diagnostic alarms are detected, but not
I/O modules still
available
No longer accessed by
the CPU.
Output modules have the
configured substitute or
Newly configured
1)
and
updated by the CPU.
Continue working without
interruption.
Added DP stations Not yet accessed by the
like I/O modules to be added (see above)
1)
CPUs are also first reset. Output modules briefly have 0 (instead of the configured substitute or
Reaction of the I/O to entering redundant mode
The fault-tolerant system is in redundant mode with the new configuration. The I/O reacts as
follows:
One-sided I/O of the
reserve CPU
One-sided I/O of the
master CPU
Added I/O mod-
ules
Configured and updated
by the CPU.
Driver blocks are not yet
available. Any occurring
Updated by the CPU.
Driver blocks are not yet available. Any occurring
process or diagnostic alarms are detected, but not
reported.
I/O modules still
Newly configured
1)
and
Continue working without interruption.
Added DP stations like I/O modules to be
Driver blocks are not yet available. Any occurring
1) CPUs are also first reset. Output modules briefly have 0 (instead of the configured substitute or
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