40
41
Troubleshooting
Solenoid valve
doesn't work
Solenoid valve doesn't
work as programmed
1
2
Check the power for solenoid valves/output ( DC24V
) is supplied.
Check the connection of the branch cable with M12
connectors to SI unit.
Check Power LED and Communication LEDs of SI
unit light on.
Check the wiring specification for manifold block
assembly and modify the program.
Power LED of
Input unit is blinking
3
Short circuit of input sensor due to failure etc. is
possible. Check the sensor.
A current larger than specified value is flowing
through the power line for input and controlling
GW/SI. Check the power supply section.
No signal is input
even though connect-
ed with sensor(s)
4
Check the power for input and controlling GW/SI
( DC24V ) is supplied.
Check indicator LED of each block lights on.
COM A - D LED
doesn't light on
5
Check Input unit is connected to the branch of unlit
COM port, and the branch cable with M12 connector
is connected to the Input unit.
When connecting no Input unit, connect a terminal
plug.
Item
No.
Solution/Corrective action
PWR LED is not lit
1
Check the power for input and controlling GW/SI
( DC24V ) is supplied.
SOL LED is not lit
2
Check the power for solenoid valves/output ( DC24V
) is supplied.
Check the power supply voltage for solenoid
valves/output doesn't drop under 20V.
RUN LED is not lit
ERR LED is lit
3
Check the signal line from PLC is connected correctly.
Check the wiring and pin No.
Check the address setting is correct.
ERR LED is blinking
4
Check the setting of transmission speed or station
No. are not changed from initial setting.
Item
No.
Solution/Corrective action
Overall system
CC-Link compatible communication
Appendix Table
Cable with CC-Link communication connector
Communication cable for bus adapter
VA-4D Series
Correns
Woodhead Japan
CC
A Series
Model
Manufacturer
For details or catalog information of communication cable, contact the manufacturer of
each cable.
