9. TROUBLESHOOTING
IMS01J02-E4
184
PLC communication
Problem Probable
cause Solution
TX1 (data transmission) lamp
does not flash
RX1 (data reception) lamp does
not flash
Wrong connection, no
connection or disconnection of
the communication cable
Confirm the connection method
or condition and connect
correctly
Breakage, wrong wiring, or
imperfect contact of the
communication cable
Confirm the wiring or connector
and repair or replace the wrong
one
Mismatch of the setting data of
communication speed, data bit
configuration and protocol with
those of the PLC
Confirm the H-PCP-J module
settings and set them correctly
TX1 (data transmission) lamp
flashes
RX1 (data reception) lamp does
not flash (is extinguished)
Wrong connection, no
connection or disconnection of
the communication cable
Confirm the connection method
or condition and connect
correctly
Breakage, wrong wiring, or
imperfect contact of the
communication cable
Confirm the wiring or connector
and repair or replace the wrong
one
Wrong setting of PLC
communication data
Confirm the PLC communication
settings and set them correctly
Setting of termination resistor in
accordance with PLC or the
insertion is done
RX1 (data reception) lamp always
light up
Wrong connection, no
connection or disconnection of
the communication cable
Confirm the connection method
or condition and connect
correctly
Breakage, wrong wiring, or
imperfect contact of the
communication cable
Confirm the wiring or connector
and repair or replace the wrong
one
Continued on the next page.