LS Industrial Systems XBC-DR10E - Communication Is Not Normal or Communication Is Not Executed Repeatedly

Chapter 10 Maintenance
XBC E-Type Main Unit 10-24 Ver. 1
10.7.7 Communication is not normal or communication is not executed repeatedly
Anomaly
Reason
Trouble shooting
Communication is not normal
or communication is not
executed repeatedly
In case of multi drop,
More than one server
sends frame
1. Execute 1:1 communication with
server and check if it works
properly.
2. Take interlock for servers to
sends frame simultaneously.
Connection error of
wiring communication
line
Change cable or check connection
of cable
In case of RS-485 (Half
duplex), non-
coincidence of timing of
TRX signal
Increase delay time of client and
server
1. When transmission is
not complete, it
requests next process
of transmission
2. When reception is
not complete, it
requests next process
of reception
Use handshake in program
thoroughly