Parallel Use Of Communications Services (Multiprotocol Mode) - Siemens CP 342-5 Manual

Application and functions
1.4 Performance data and behavior in operation
1.4.7

Parallel use of communications services (multiprotocol mode)

Speed
Using the various available communications services at the same time affects the
communication speed.
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.
Note the following limits:
Characteristic
Number of operable connections in total:
•
•
1) The number of S7 connections that can be operated when using the module as DP master depends
on the number and configuration of the assigned DP slaves (see table below).
Influence of the data length in S7 communication
In S7 communication, the data length of the jobs and in DP mode, the number of DP slaves
and the length of the I/O data mean the following restrictions:
● Number of S7 connections
● Number of jobs that can be sent at one time
The decisive factor is the job with the highest data length.
18
in operation with PROFIBUS DP
(DP master with up to 15 DP slave
in operation without PROFIBUS DP
Explanation / values
44 maximum
Of these, up to 16 FDL connections and 12 S7
)
1)
connections and 16 OP connections in multiplex
mode.
48 maximum
CP 342-5 / CP 342-5 FO
Manual, 07/2017, C79000-G8976-C146-10