Troubleshooting; Appendix Table - SMC Networks EX500 Series Instruction Manual

Troubleshooting

Overall system
No. Item
1 Solenoid valve Check the power for solenoid valves/output ( DC24V
doesn't work ) 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.
2
Solenoid valve doesn't Check the wiring specification for manifold block
work as programmed assembly and modify the program.
3 Power LED of Short circuit of input sensor due to failure etc. is
Input unit is blinking 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.
4 No signal is input Check the power for input and controlling GW/SI
even though connect- ( DC24V ) is supplied.
ed with sensor(s) Check indicator LED of each block lights on.
5 COM A - D LED Check Input unit is connected to the branch of unlit
doesn't light on COM port, and the branch cable with M12 connector
is connected to the Input unit.
When connecting no Input unit, connect a terminal
plug.
CC-Link compatible communication
No. Item
1 PWR LED is not lit
Check the power for input and controlling GW/SI
( DC24V ) is supplied.
SOL LED is not lit Check the power for solenoid valves/output ( DC24V
2
) is supplied.
Check the power supply voltage for solenoid
valves/output doesn't drop under 20V.
3 RUN LED is not lit Check the signal line from PLC is connected correctly.
ERR LED is lit Check the wiring and pin No.
Check the address setting is correct.
4 ERR LED is blinking Check the setting of transmission speed or station
No. are not changed from initial setting.
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Solution/Corrective action
Solution/Corrective action

Appendix Table

Cable with CC-Link communication connector
Communication cable for bus adapter
Manufacturer Model
Correns VA-4D Series
Woodhead Japan
CC A Series
For details or catalog information of communication cable, contact the manufacturer of
each cable.
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