Technical Specifications Of The Function Blocks - Siemens Simatic S7-300 CP 341 User Manual

Communication via Function Blocks

6.9 Technical Specifications of the Function Blocks

6.9 Technical Specifications of the Function Blocks
Memory requirements
The table below shows the memory requirements of the CP 341 function blocks/functions.
Table 6- 14
Block
FC 5
FC 6
FB 7
FB 8
Minimum number of CPU cycles
The table below describes the minimum number of CPU cycles (FB/FC calls) required to
transact a "minimum request" (32 bytes SEND/RECEIVE for the quantity of user data
transported per program cycle). This only applies in centralized operation.
Table 6- 15
P_RCV_RK
P_SND_RK
V24_STAT
V24_SET
Before the CP 341 can process an activated request after the CPU has changed from STOP
to RUN mode, the CP-CPU startup mechanism P_SND_RK must have been completed. Any
requests initiated in the meantime are not lost. They are transmitted once the start-up
coordination with the CP 341 is finished.
Before the CP 341 can receive a message frame in the user program after the CPU has
changed from STOP to RUN mode, the CP-CPU startup mechanism P_RCV_RK must have
been completed.
178
www.gkbpx.com
Memory requirements of the function blocks/functions in bytes
Name Version
V24_STAT 2.0
V24_SET 2.0
P_RCV_RK 2.1
P_SND_RK 2.3
Minimum number of CPU cycles
Completion without
errors
≥ 3
≥ 3
1
2
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Load memory Working memory
188 72
156 48
3584 2982
3036 2490
Number of CPU cycles for processing ...
Termination with errors
≥ 3
≥ 3
-
>> 2
Manual, 09/2008, A5E02191071-01
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
Local data
2
2
106
32
RESET/RESTART
≥ 4
≥ 4
-
-