SMC Networks SI Unit Operation Manual page 35

No. Problem
1 PWR(V) indicator is OFF
PWR(V) indicator is
2
Yellow ON
PWR(V) indicator is
3
Yellow flash
PWR(V) indicator is
4
Green flash
PWR(V) indicator is
5 Yellow/Green flashing
PWR(V) indicator is
6 Red/Yellow flashing
No. Problem
Valve cannot be Turned
1
ON
Table 9-4 Troubleshooting for PWR(V) for valves
Possible cause
Power supply voltage for PWR is
not present
Incorrect wiring
Fuse blown by over voltage
protection (> 40 V)
Incorrect wiring
PWR(V) is not present
PWR(V) is lower than the
permissible level
Safe power supply (safety output)
for the valve is not active
PWR is higher than the
permissible level
Table 9-5 Troubleshooting for valve operation
Possible cause
No PROFINET and PROFIsafe
communication
Safe power supply (safety output)
for the valve is not active
The safe controller requests
operator acknowledgment for the
SI Unit
PWR or/and PWR(V) is not
present or lower than the
permissible level
Connection between the SI Unit
and valve manifold is defective
The SI Unit and valve output
type(PNP/NPN) do not match
Self-test has failed
Valve has failed
programing
- 34 -
Remedy
Check the power supply and supply
voltage level
●Check the cable
●Check the wiring and pin assignment
●Check the power supply voltage
level.
●Replace with a new unit.
●Check the cable
●Check the wiring and pin numbers
Check the power supply voltage level
●Check the power supply voltage level
●Turn on the Safe power supply
(safety output)
Check the power supply voltage level
Turn on the Safe power supply (safety
output)
Check the power supply voltage level
Remedy
Check the LEDs
Turn on the Safe power supply
(safety output)
●Check the diagnostic message
●Reintegrate the SI Unit
●Check the power supply and supply
voltage level
●Check the PWR and PWR(V) LED
indicator
Check the connection between the
SI Unit and valve manifold
Check the output type(PNP/NPN)
the SI Unit and valves.
●Reset the power supply
●Check the diagnostic message
Replace the valve
Check the program
No.EX※※-OMU1006-B