Omron OMNUC FND Series User Manual page 208

Application
Alarm dis- Error content
play
A.L42 Absolute encoder
backup error
A.L43 Absolute encoder
checksum error
A.L44 Absolute encoder
battery error
A.L45 Absolute encoder
absolute value
error
A.L46 Absolute encoder
over speed
A.L47 Encoder data not
transmitted
A.L48 Encoder initial-
ization error
A.L50 BCD data error
A.L51 Present position
unknown
A.L52 PTP data not set
Note 1. If the motor has been incorrectly connected, or if the applicable motor (UP-02) has been incor-
rectly set, the motor may perform some revolutions before an A.L41 error is generated. Check
the settings for the connected motor and the applicable motor before recommencing opera-
tion.
Note 2. For details on replaceable batteries, refer to 2-2-7 Battery Wiring and Encoder Setup for
Absolute Encoder.
4-16
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Condition when
error occurred
Occurred when The absolute encoder's
power was turned backup voltage dropped (even
ON. if the encoder was being used
for the first time).
Occurred when There was an error in the
power was turned absolute encoder's memory
ON. data check.
Occurred when The absolute encoder's
power was turned backup battery voltage
ON. dropped (to 2.6 to 2.8 V
max.).
Occurred when There was an error in the
power was turned absolute encoder's sensor
ON. check. (Internal encoder
error)
Occurred when The speed exceeded
power was turned 400 r/min when the power
ON. was turned ON.
Occurred when
The UP-02 (applicable motor)
power was turned setting is wrong.
ON. ON
The encoder S-phase wiring
is disconnected.
Occurred when The Driver malfunctioned.
power was turned
ON.
Occurred when The data input for direct posi-
power was turned tioning was not BCD.
ON ON.
The point number input for
point positioning was not
BCD.
Occurred at startup START, TEACH, or ORIGIN
or when teaching. TEACH was executed when
the origin was not established.
Occurred when A point number was selected
power was turned for which the PTP data was
ON. not set.
Probable cause
Perform the absolute encoder
setup.
Perform the absolute encoder
setup.
Replace the battery and then
perform the absolute encoder
setup.
Turn the power OFF and
then back ON.
If the error persists, then
replace the motor.
Turn ON the power while the
motor is stopped
Set the motor model code cor-
rectly.
Connect any disconnected
places.
Turn the power OFF and
then back ON.
If the error persists, then
replace the motor.
Re-input the data and make
sure it is correct.
Execute an origin search to
establish the origin.
Set the correct PTP data.
Select a point number for
which PTP data has been
set.
Chapter 4
Countermeasures