Troubleshooting - 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
connector 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 possibly caused. 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 even Check the power for input and controlling GW/SI
though connected with ( DC24V ) is supplied.
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.
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Solution/Corrective action
DeviceNet compatible communication
No. Item
1 MS LED status
Normal status: Lit in green
Fatal failure: Lit in red
2 NS LED status
Offline/Power is OFF: Unlit
Online/Communication is not established:
Blinking in green
Online/Communication is established:
Lit in green
Minor communication error occurred:
Blinking in red
Fatal communication error occurred:
Lit in red
3 SOL LED is unlit
Solution/Corrective action
Check the signal line from PLC is
connected.
Check the wiring and pin Nos.
Check the data rate and address
settings.
Check the signal line from PLC is
connected.
Check the wiring and pin Nos.
Check the data rate and address
setting.
Check the power for solenoid
valves/output (DC24V) is supplied.
Check the power supply voltage for
solenoid valves/output doesn't drop
under 20V.
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