Link-up and update
8.2 Link-up and update via an ES command
CPU 410 Process Automation/CPU 410 SMART
120
System Manual, 05/2017, A5E31622160-AC
8.2
Link-up and update via an ES command
Which commands you can use on the programming device to initiate a link-up and update
operation is determined by the current conditions on the master and standby CPU. The
following table shows the possible PG commands for the link-up and update in various
circumstances.
Table 8- 2
PG commands for link-up and update
Link-up and update
as PG command:
Firmware version
on master and
standby CPU
Available sync
connections
Hardware version
on master and
standby CPU
Number of
POs on system
expansion
cards
Restart of the
standby
Are identical
2
Are identical
Are identical
Switching to a
partner CPU with
modified configura-
tion
Are identical
2
Are identical
Are identical
Switching to a
partner CPU with
modified operating
system
Are different
2
Are identical
Are identical
Switching to a
partner CPU with
modified hardware
product version
Are identical
2
Are different
Are identical
Switching to a
partner CPU using
only one intact
redundant link
Are identical
1
Are identical
Are identical
Switching to a
partner CPU with
modified PO limit
Are identical
2
Are identical
Are different
8.3
Time monitoring
Program execution is interrupted for a certain time during updating. This section is relevant
to you if this period is critical in your process. If this is the case, configure one of the
monitoring times described below.
During updating, the fault-tolerant system monitors the cycle time extension, communication
delay and inhibit time for priority classes > 15 in order to ensure that their configured
maximum values are not exceeded, and that the configured minimum I/O retention time is
maintained.
You made allowances for the technological requirements in your configuration of monitoring
times.