SMC Networks DeviceNet EX260 Series Operation Manual page 30

Troubleshooting table
Fault No.1
Fault Probable cause
Defective
SI unit
DeviceNet
PWR_LED and
MS_LED
OFF
DeviceNet
not supplied
Fault No.2
Fault
Probable cause
Defective power
cable wiring for the
SI unit
solenoid valve
PWR(V)_LED
OFF
Load voltage for the
valve is not supplied
Fault No.3
Fault
Probable cause
SI unit
SI unit fault
MS_LED Red
Fault No.4
Fault Probable cause
EEPROM error
SI unit
MS_LED
Red flash
Invalid Switch setting
Recommended error handling
Check the condition DeviceNet
TM
cable connection.
TM
power is
Check the condition of DeviceNet
Recommended error handling
Check the condition of the power cable wiring
for the valve.
Check the condition of the supply voltage for
the valve.
Recommended error handling
SI unit is broken.
Recommended error handling
EEPROM writing error
Check if the switch setting for MAC ID or
communication speed switch has been
changed while the unit power is ON.
TM
cable
TM
power.
‑29‑
Recommended action
TM
Retighten the DeviceNet
cable.
(Replace the cable if it is
broken)
TM
Correct the DeviceNet
power wiring layout.
Supply 11-25 VDC to the
TM
DeviceNet power.
Recommended action
Retighten the power cable.
(Replace the cable if it is
broken).
Correct the power cable wiring
layout.
Supply 24 VDC 10%/-5% to
the valve.
Recommended action
Replace the SI unit.
Recommended action
Send the reset service to reset
the SI unit. (Sending data::
Service code 5, class ID 1,
instance 1, value 1)
Change the address switch or
communication speed switch
after the unit power switch off
EX##‑OMN0013