SMC Networks EX500 - Manual (Page 39)

EX500 Serial System EX## - OME0008
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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
as in the program. ・ Check the wiring specification of Manifold Block Ass'y.
( Refer to section 8 -2 )
3 The Power LED of the Input Unit
is flashing. ・ There is possibility that the input sensor has a short-circuit .
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
signal. ・ Check the power supply to make sure that 24VDC is
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.
ERR LED lights. ･ Check the signal line from PLC is properly connected.
( 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.