Siemens SIMATIC NET CP 443-5 Extended, Руководство пользователя

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Application and functions
1.4 Performance data
CP 443-5 Extended
Manual, 11/2018, C79000-G8976-C162-09
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1.4.3 Characteristic data of open communications services (SEND/RECEIVE
interface) over FDL connections
General characteristic data
The characteristic data is important when operating FDL connections (specified, free layer 2
(SDA and SDN), broadcast, multicast):
Table 1- 5 General characteristic data of open communications services
Characteristic Explanation / values
Total number of FDL connections that can
be operated.
32 max.
Size of the transferable data area on FDL
connections.
1-240 bytes max. per specified FDL connection (for sending and receiving)
Free Layer 2, broadcast and multicast:
Up to 236 bytes of user data can be transferred per job. The job header
occupies an additional 4 bytes.
Cycle load time due to FDL connections
The calculation of the cycle load time for FDL connections is largely dependent on the time
required to execute the program blocks (AG_SEND, AG_RECV) on the S7400 CPU.
The following table lists the cycle load times of the available FCs in milliseconds. A
distinction is made between the statuses "job completed" and "job active". The entries relate
to the run time in the CPU 417 (6ES7 417-4XL04-0AB0 - see Table 1-1 Use with the current
CPU types (Page 13)).
Table 1- 6 Cycle load time
Job status Job completed Job active
Component / FC min. max. min. max.
AG_SEND 0.10 ms 0.11 ms 0.14 ms 0.16 ms
AG_RECV 0.13 ms 0.14 ms 0.12 ms 0.13 ms
1.4.4 Characteristics of S7 communication
General characteristic data
The following information is important when operating S7 connections:
Table 1- 7 General characteristics of S7 connections
Characteristic Explanation / values
Number of S7 connections that can
be operated via PROFIBUS
48 max.
(The value depends on the S7400 CPU being used.)