Siemens SIMATIC S7-400 CP 440 - Figure 6-3 Time Sequence Chart for the 11 RES_RECV FB

Communication via Function Blocks
6.3 Using the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
100 Manual, 09/2007, A5E00057742-03
Time Sequence Chart for the RES_RECV FB
The figure below illustrates the behavior of the DONE and ERROR parameters, depending
on how the REQ and R inputs are wired.
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Figure 6-3 Time Sequence Chart for the 11 RES_RECV FB
Note
The REQ input is edge-triggered. A positive edge at the REQ input is adequate. It is not
required that the RLO (result of logical operation) is "1" during the whole transmission
procedure.
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