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-33-
No.EX##-OME0015-C
Fault No. 5
Problem
Possible cause
Investigation method
Countermeasures
Re-wire the DeviceNet
TM
cable. (Replace the cable if it
is damaged).
Incorrect wiring of
the power supply
for DeviceNet
TM
communication
Check the DeviceNet
TM
cable connections and
check for broken wires.
Rectify the wiring of the
DeviceNet
TM
cable.
SI unit
MOD/NET LED
flashes Green
I/O connection
stand-by (off-line
status)
If the network is using a scan list, check that the
slave is registered correctly into the scan list.
Correct the setting of the
scan list.
Fault No. 6
Problem
Possible cause
Investigation method
Countermeasures
The solenoid
valves after
output 17 do
not operate
The total number
of solenoid valve
outputs connected
has exceeded the
max. allowed
Check that the total number of outputs
connected to the SI unit is 16 or less.
Make corrections so that the
total number of outputs is 16
or less.
Note when single solenoid
valves are mounted onto a
double wiring specified
manifold.
Fault No. 7
Problem
Possible cause
Investigation method
Countermeasures
Poor connection
between SI unit
and valve manifold
Check if there are any loose screws making
the connection between the SI unit and the
Valve manifold.
Tighten the screws while
holding the SI unit and the
solenoid valve manifold so
that there is no gap between
them. Tighten the screws to
the specified tightening
torque.
Polarity of the
solenoid valve and
the SI unit output
are not compatible
Check that the solenoid valve polarity
specification and output polarity of the SI unit
are compatible.
Use a solenoid valve polarity
compatible with the output
polarity of the SI unit.
Solenoid
valves do not
operate
correctly,
solenoid valve
LED is OFF
Solenoid valve
failure
Refer to the troubleshooting of the solenoid
valve.
Refer to the troubleshooting
of the solenoid valve.
Fault No. 8
Problem
Possible cause
Investigation method
Countermeasures
Solenoid
valves do not
operate
correctly,
solenoid valve
LED is ON.
Solenoid valve
failure
Refer to the troubleshooting of the solenoid
valve.
Refer to the troubleshooting
of the solenoid valve.