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Performance data and behavior in operation
5.6 Characteristic data for multiplexing OP connections
5.6
Characteristic data for multiplexing OP connections
General characteristic data
The following information is important when operating HMI (TD/OP) connections:
Characteristic
Number of operable HMI connections
When multiplexing OP connections, the following acyclic services are supported:
● read once
● write once
● read system status list
If cyclic services or ProAgent interfacing (ALARM_S message block) are required, please
continue to use the rack/slot addressing of the remote S7-300 CPU.
NOTICE
PG connections and connections to WinCC
PG connections and connections to WinCC are not operated over the multiplexer. When
operating a PG, a connection resource is always occupied.
5.7
Parallel use of communications services (multiprotocol mode)
Performance
Using the various available communications services at the same time affects
communication performance.
Note
Recommendation for multiprotocol mode
In multiprotocol mode - DP + FDL + S7 functions / TD/OP connections - you should select a
delay time of 2-5 ms.
Overall operational limits
When using communications connections/services at the same time, it is not possible to
achieve the maximum values as when using the communications connections/services
alone.
30
Explanation / values
16 max.
Manual, 10/2011, C79000-G8976-C146-09
CP 342-5 / CP 342-5 FO
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