Siemens SIMATIC S5 CP 523 Manual page 196

Using the "SEND" and "Receive" Function Blocks CP 523
8.1.5 Flowchart of "SEND" FB 200
Evaluate RLO and read status
SEGMENT 2
START
Note "RLO at jump"
Transfer "Read STATUS" request to
CP 523
Read job request
acknowledgement from CP 523
Read CBS (when 3964(R) mode)
Display CP 523 - STATUS
Display CBS (when 3964(R) mode)
RLO = 0 or is SEND
Yes
executing?
No
1
END
8-6
EWA 4NEB 811 6044-02a