5. Communication Problem
It seems that communication does not work.
Phenomenon: On the screen where the object is not many, communication works but when you move the
screen where the object is many, timeout occurs.
< Cause >
(1) In the device setting, the communication time-out is set to be too short.
<Solution>
(1) It occurs because timeout is set much smaller than sum of request time of communication data and
response time from PLC. In the device setting at the XP-Builder, after setting communication time out to
be big, download program and execute again.
It seems that communication doesn’t work.
Phenomenon: Communication doesn’t work.
< Cause >
(1) Communication setting or cable may be not normal.
<Solution>
(1) In case of RS-232C, check whether connection setting is normal or not in XP-Builder.
(2) In case of RS-422/485, check whether station and communication connection setting is normal or not.
(3) If 1), 2) is normal, do diagnosis about PLC-RS232C, PLC-RS485/422 at the Serial diagnosis screen of
device menu. Refer to the [Device manual ch.5.6 Serial Communication Diagnosis]
(4) If 3) is normal, check whether connection cable has error or not.
(5) In case of Ethernet, check the port and IP setting about relative PLC.
► Before trial operation of the product, be sure to check if a normal communication is available
between XGT Panel and the subject device of control
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