Libraries
9.4 Open user communication library
S7-200 SMART
522 System Manual, V2.3, 07/2017, A5E03822230-AF
This is an example usage of the UDP_RECV instruction:
The DISCONNECT instruction terminates an existing communication connection. The
DISCONNECT instruction is used for all protocols.
LocPort, Done, Busy, Er-
ror, Status
The DISCONNECT terminates an existing communication connec-
tion for all protocols.
The DISCONNECT instruction initiates the connection termination when the program calls
the DISCONNECT instruction with the Req input set TRUE. The Req input is level-triggered.
It is recommended that you put a positive edge trigger on the Req input.
If the requested connection (ConnID) is currently busy connecting, disconnecting, or cannot
be found because the connection has been reused, the DISCONNECT instruction returns an
error.
The DISCONNECT instruction displays the Done or Error output status for at least one call
of the instruction after the disconnect operation is complete. The instruction may return the
status of the DISCONNECT instruction for the specified connection for subsequent calls until
the CPU reuses the connection for another connect operation.
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