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12 - 11
12 Troubleshooting and Maintenance
GX-series EtherCAT Slave Unit User’s Manual
12-
1 T
rou
blesh
oo
ting
12
12-
1-2 Er
ror
s Un
ique
to Each Slave Unit
Encoder Input Slave Unit
The count pulse cannot be
detected.
Input wiring is wrong.
Check wiring of input A
and input B.
The I/O power is not
supplied. Check that the I/O power
is supplied.
I/O power supply voltage
is outside the rated range.
Set the I/O power supply
voltage within the rated
voltage.
A connected device is
disconnected. Check the wiring with the
connected device.
A connected device is
defective. Replace the connected
device.
The setting of counter
input method is wrong.
Set the correct counter
input method and restart
the Slave Unit.
The pulse is not counted
accurately.
The pulse frequency
exceeds the maximum
frequency of the Slave
Unit specification.
Or, the frequency exceeds
the maximum value of set
mode.
Set the pulse frequency
within the Slave Unit
specification or the mode
maximum value.
The setting of counter
input method is wrong.
Set the correct counter
input method and restart
the Slave Unit.
The counter value is not
reset even the present
value external reset signal
or phase Z pulse are
input.
Input wiring is wrong. Check input wiring.
The soft switch "present
value external reset
enabled" is set to 0
(disabled). Set the soft switch
"present value external
reset enabled" to 1
(enabled).
Counting is not possible.
(The count value cannot
be reset with external
input when counting is not
possible.)
Change to count possible
status. If it is necessary to
reset because counting is
not possible, reset with
the soft switch "present
value internal reset
execution."
Although the soft switch
"present value external
reset enabled" is enabled,
the counter value cannot
be reset even if signals
are input.
After resetting the counter
value externally, the
"external reset generation
flag" changes from 0 to 1.
After that, external reset
cannot be performed until
the flag is cleared.
Change the soft switch
"clear present value
external reset generation
flag" from 0 to 1.
At the rise from 0 to 1, the
"external reset generation
flag" changes from 1 to 0
and external reset is
enabled.
The counter value cannot
be latched even if external
control input (latch A/B)
signals are input.
The soft switch "external
latch A/B enabled" is set
to 0 (disabled). Set the soft switch
"external latch A/B
enabled" to 1 (enabled).
Although the soft switch
"external latch A/B
enabled" is enabled, the
counter value cannot be
latched even if signals are
input.
After latching the counter
value, the "external latch
A/B generation flag"
changes from 0 to 1. After
that, it is not possible to
latch until the flag is
cleared.
Change the soft switch
"clear external latch A/B
generation flag" from 0 to
1. At the rise from 0 to 1,
the "external latch A/B
generation flag" changes
from 1 to 0 and latch is
enabled.
Slave Unit type Symptom Cause Measures