EX500 Serial System

EX## - OME0008

11. Trouble shooting

・Whole system

NO.

Item

Remedies

1

The solenoid valve does not work.

・Check the power supply for the solenoid valve is supplying

 

 

24VDC. ( Refer to section 9 -1 )

 

 

・Check the Branch Cable with M12 Connector is properly

 

 

connected with the SI Unit. ( Refer to section 8 -1 )

 

 

・Check the Power LED and the Communication LED of

 

 

the SI Unit light up. ( Refer to section 8 -1 )

2

The solenoid valve does not work

・Check the wiring specification of Manifold Block Ass'y.

 

as in the program.

( Refer to section 8 -2 )

3

The Power LED of the Input Unit

・There is possibility that the input sensor has a short-circuit .

 

is flashing.

Check that the sensor is not bad.

 

 

・Check the power supply for a possibility that the current in

 

 

power supply line is above the specification.

4

Connecting sensor does not start

・Check the power supply to make sure that 24VDC is

 

signal.

supplied. ( Refer to section 9 -1 )

 

 

・Check whether or not the Indicator LED of each block

 

 

lights up. ( Refer to section 7 -1 )

5

COM A - D does not light.

・Check whether or not the Input Unit is connected with the

 

 

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 )

 

 

・Check that a Terminal Plug is connected with port C1 or C0

 

 

if Input Unit Manifold, is not connected.

 

 

( Refer to section 9 -2 -2 )

・Remote I/O communication

 

NO.

Item

Remedies

1

RUN LED lights off.

・Check the power supply is supplying 24VDC.

 

 

( Refer to section 9 -1 )

2

COM LED lights off.

･Check the signal line from PLC is properly connected.

 

ERR LED lights.

( Refer to section 4 -2 )

 

 

・Check wiring and pin out. ( Refer to section 3 -2 )

 

 

･Check the RACK Address is correctly set.

 

 

( Refer to section 4 -4 -1 )

 

 

･Check Starting Quarter is correctly set.

 

 

( Refer to section 4 -4 -1 )

 

 

･Check Data Rate is correctly set.

 

 

( Refer to section 4 -4 -2 )

 

 

･Check Last RACK is correctly set.

 

 

( Refer to section 4 -4 -2 )

 

 

・Check the terminating resistance is correctly set.

 

 

( Refer to section 4 -4 -3 )

3

SOL LED lights off.

・Check the power supply for 24VDC ( Refer to section 9 -1 )

 

 

・Check the power supply for the solenoid valve is not less

 

 

than 20V.

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