Supplementary information
16.5 Programming device functions in STEP 7
CPU 410-5H Process Automation/CPU 410 SMART
222 System Manual, 10/2013, A5E32631667-AA
Programming device functions in STEP 7
Display in SIMATIC Manager
In order to do justice to the special features of a fault-tolerant station, the way in which the
system is visualized and edited in SIMATIC Manager differs from that of a S7-400 standard
station as follows:
● In the offline view, the S7 program appears only under CPU0 of the fault-tolerant station.
No S7 program is visible under CPU1.
● In the online view, the S7 program appears under both CPUs and can be selected in both
locations.
For programming device (PG) functions that establish online connections (e.g., downloading
charts), one of the two CPUs has to be selected even if the function affects the entire system
over the redundant link.
● Data which is modified in one of the central processing units in redundant operation affect
the other CPUs over the redundant link.
● Data which is modified when there is no redundant link (i.e. in single mode) initially affects
only the processed CPU. The blocks are applied by the master CPU to the reserve CPU
during the next link-up and update. Exception: No new blocks are applied after changing
the configuration. Loading the blocks is then the responsibility of the user.
Communication services
16.6.1
Overview of communication services
Overview
Table 16- 4 Communication services of the CPUs
Allocation of S7 connection
resources
Commissioning, testing, diagnostics
Operator control and monitoring
S7 communication Data exchange via configured
Yes Yes Yes
Routing of PG functions For example, testing, diagnostics
beyond network boundaries
Yes Yes Yes
PROFIBUS DP Data exchange between master and
No Yes No
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