Panasonic FP3 Technical Manual page 105

J When the COM. LED is OFF
<Error condition: There is no communications with
any slave station.>
Error example
Master
station
Master
station
Check the POWER LED and power supply wiring
of the slave station.
Set the terminal station correctly using the
operation mode selector.
See page 53 for details about terminal station
setting.
When the setting is changed, turn the power
OFF and then ON again.
Check the wiring and look for looseness of
terminal screws.
Check the transmission cable for correct wiring.
See page 43 about wiring with transmission
cable.
If there is a break in the transmission cable,
change the cable.
Slave Slave
station station
Disconnection
Slave Slave
station station
No power supply
7-2. Remote I/O Control When an Error Occurs
J When the COM. LED is flashing slowly
(in 1 s intervals)
<Error condition: Remote I/O control terminated due
to a communications error.>
Error example
Master
station
Master
station
No power supply
Make sure that power is properly supplied to the
slave stations.
Check the wiring and look for looseness of
terminal screws.
Check the transmission cable for correct wiring.
See page 43 about wiring with transmission
cable.
If there is a break in the transmission cable,
change the cable.
After checking the above items, turn the power
OFF, then ON again.
Slave Slave
station station
Disconnection
Slave Slave
station station
99