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
12.8.3
Opening the H-CiR wizard
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:
Type of I/O
One-sided I/O of the
previous master CPU
One-sided I/O of the new
master CPU
Switched I/O
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
reported.
I/O modules still
available
No longer accessed by
the CPU.
Output modules have the
configured substitute or
holding values.
Newly configured
1)
and
updated by the CPU.
Continue working without
interruption.
Added DP stations Not yet accessed by the
CPU.
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
holding values).
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:
Type of I/O
One-sided I/O of the
reserve CPU
One-sided I/O of the
master CPU
Switched I/O
Added I/O mod-
ules
Configured and updated
by the CPU.
Driver blocks are not yet
available. Any occurring
alarms are not reported.
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
available
Newly configured
1)
and
updated by the CPU.
Continue working without interruption.
Added DP stations like I/O modules to be
added (see above)
Driver blocks are not yet available. Any occurring
alarms are not reported.
1) CPUs are also first reset. Output modules briefly have 0 (instead of the configured substitute or
holding values).