
-27-
No.D-
※
S-OMU0002-A
Trouble
No.
Problem
Possible cause
Investigation method
Countermeasures
7
Teach pad
operation is not
possible
Local user
interface is locked
If the teach pad is touched
while locking, the green LED
flashes 4 times.
Unlock the interface in IO-
Link mode.
Not entered into
the transition
mode of the teach
pad.
The teach pad is continuously
touched.
Touch the teach pad after 3
seconds.
Position sensor
failure
Replace the product.
8
IO-Link does not
function correctly
Status display
Incorrect wiring
Check the cable connections
and for the presence of broken
wires.
Check and correct the wiring.
Power supply
error from the IO-
Link master
Check the power supply voltage
from the IO-Link master.
Supply 18 to 30 VDC to the
IO-Link master.
9
IO-Link does not
function correctly
LED for
indicating status
flashes
IO-Link Master
and product
version are not
matched.
Check the IO-Link version of
the master and device.
Match the master IO-Link
version to the device.
Communication
mode is not
transferred to the
Operation mode.
Check the setting of the data
storage access lock and data
storage backup level of the
master.
Release the data storage
access lock. Or deactivate
the setting of the data storage
backup level of the master
port.
Back-up and re-
store required due
to data storage
lock
Check the data storage lock.
Release the data storage
lock.
10
The operation is
unstable.
(chattering)
Improper setting
(mounting)
position
Check if the detection is
performed close to the limit of
the Auto switch operating
range.
Move the Auto switch to the
correct position (near the
centre of the operating
range).
Displacement
from the set
position
Check for looseness of the Auto
switch mounting bracket and
the mounting screws.
Fix at the correct position
using the appropriate torque
(Tightening torque: 0.05 to
0.15 Nm)
Incorrect wiring
Check the condition of the
wiring connection (connector
contact pin and crimping
terminal).
Correct the wiring (Perform
wiring of the connection
again).
Breakage of lead
wire
Check the repeated bending
stress/tension applied to a part
of the lead wire.
Correct the wiring
(Adjust tensile force and
enlarge bending radius.)