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EX500 Serial System
11. Trouble shooting
・ ・ ・ ・ Whole system
NO.
1
The solenoid valve does not work.
2
The solenoid valve does not work
as in the program.
3
The Power LED of the Input Unit
is flashing.
4
Connecting sensor does not start
signal.
5
COM A - D does not light.
・ ・ ・ ・ Remote I/O communication
NO.
1
RUN LED lights off.
2
COM LED lights off.
ERR LED lights.
3
SOL LED lights off.
Item
・ Check the power supply for the solenoid valve is supplying
・Check the Branch Cable with M12 Connector is properly
・Check the Power LED and the Communication LED of
・Check the wiring specification of Manifold Block Ass'y.
・There is possibility that the input sensor has a short-circuit .
・Check the power supply for a possibility that the current in
・Check the power supply to make sure that 24VDC is
・Check whether or not the Indicator LED of each block
・Check whether or not the Input Unit is connected with the
・Check that a Terminal Plug is connected with port C1 or C0
Item
・Check the power supply is supplying 24VDC.
･Check the signal line from PLC is properly connected.
・Check wiring and pin out. ( Refer to section 3 -2 )
･Check the RACK Address is correctly set.
･Check Starting Quarter is correctly set.
･Check Data Rate is correctly set.
･Check Last RACK is correctly set.
・Check the terminating resistance is correctly set.
・Check the power supply for 24VDC ( Refer to section 9 -1 )
・Check the power supply for the solenoid valve is not less
24VDC. ( Refer to section 9 -1 )
connected with the SI Unit. ( Refer to section 8 -1 )
the SI Unit light up. ( Refer to section 8 -1 )
( Refer to section 8 -2 )
Check that the sensor is not bad.
power supply line is above the specification.
supplied. ( Refer to section 9 -1 )
lights up. ( Refer to section 7 -1 )
branch of the COM port which does not light up.
Check the Branch Cable with M12 Connector is properly
connected with the Input Unit. ( Refer to section 7 -1 )
if Input Unit Manifold, is not connected.
( Refer to section 9 -2 -2 )
( Refer to section 9 -1 )
( Refer to section 4 -2 )
( Refer to section 4 -4 -1 )
( Refer to section 4 -4 -1 )
( Refer to section 4 -4 -2 )
( Refer to section 4 -4 -2 )
( Refer to section 4 -4 -3 )
than 20V.
- 38 -
Remedies
Remedies
EX## - OME0008
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