Omron GX-ID1611 User Manual page 288

12 Troubleshooting and Maintenance
Slave Unit type
Slave Units to which
Expansion Units can be
mounted
Slave Units with digital
inputs
12 - 8
Symptom
I/O communications
stopped after mounting or
removing an Expansion
Unit and turning ON the
power.
The [PWR] indicator lights
red after mounting or
removing an Expansion
Unit online.
Although a connected
device is ON, nothing is
input and Slave Unit's
input indicator does not
turn ON either.
A connected device is ON
and Slave Unit's input
indicator is turned ON, but
nothing is input.
There is a delay with the
ON and OFF timing for
input values.
Cause
The number of I/O points
increase or decrease
when Expansion Units are
mounted or removed. The
number of I/O points may
not conform to the I/O
data assigned to the
EtherCAT Master Unit.
Expansion Units cannot
be mounted or removed
online.
The I/O power is not
supplied.
I/O power supply voltage
is outside the rated range.
Wiring with the connected
device is incorrect.
Terminal block screws are
loosened. (Terminal block
type only)
A connected device is
disconnected.
A connected device is
defective.
A communications error
occurred.
An input filter may be set.
GX-series EtherCAT Slave Unit User's Manual
Measures
Allocate I/O data again to
the EtherCAT Master Unit.
Turn OFF the power
supply before mounting or
removing Expansion
Units.
Check that the I/O power
is supplied.
Set the I/O power supply
voltage within the rated
voltage.
Check the wiring with the
connected device.
Check if terminal block
screws are loosened.
Check the wiring with the
connected device.
Replace the connected
device.
Check if a
communications error
occurred.
Set the input filter value to
0. Alternatively, change
the input filter to an
appropriate value.