Siemens SIMATIC S7-400H - Conditions for Link-Up and Update; Table 12- 2 Conditions for Link-Up and Update

Link-up and update
12.2 Conditions for link-up and update
S7-400H
142 System Manual, 03/2012, A5E00267695-11
12.2 Conditions for link-up and update
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 reserve CPU. The table
below shows the correlation between those conditions and available programming device
commands for link-up and update operations.
Table 12- 2 Conditions for link-up and update
Link-up and
update as PG
command:
Size and type of
load memory in
the master and
reserve CPUs
FW version in the
master and
reserve CPUs
Available sync
connections
Hardware version
on master and
reserve CPU
Restart of the
reserve
Are identical Are identical 2 Are identical
Switch to CPU
with modified
configuration
RAM and EPROM
mixed
Are identical 2 Are identical
Switchover to
CPU with
expanded memory
configuration
Size of load
memory in the
reserve CPU is
larger than that of
the master
Are identical 2 Are identical
Switchover to
CPU with modified
operating system
Are identical Are different 2 Are identical
CPUs with
changed hardware
version
Are identical Are identical 2 Are different
Only one
synchronization
link-up is available
over only one
intact redundant
link
Are identical Are identical 1 Are identical