Omron NJ Series Troubleshooting Manual page 111

Event code Event name
74250000 hex Homing
Direction
Limit Input
Detected
74260000 hex Homing Limit
Inputs
Detected in
Both Direc-
tions
74270000 hex Home Prox-
imity/Homing
Opposite
Direction
Limit Input
Detected
74280000 hex Home Prox-
imity/Homing
Direction
Limit Input
Detected
7429 0000 hex Home
Input/Hom-
ing Opposite
Direction
Limit Input
Detected
742A0000 hex Home
Input/Hom-
ing Direction
Limit Input
Detected
NJ-series Troubleshooting Manual (W503)
Meaning Assumed cause
The limit signal in • The Operation Selection at
the homing direc- Negative Limit Input or Opera-
tion was detected tion Selection at Positive Limit
during a homing Input parameter is set to No
operation. reverse turn.
• The location of the homing
input signal sensors, homing
settings, and homing start posi-
tion cause a limit input to be
reached.
• The input signal sensor wiring
is incorrect or the sensor is
faulty.
The limit signals in • The wiring of the limit signal is
both directions incorrect.
were detected dur-
• The limit sensor is installed in
ing a homing opera-
the wrong location.
tion.
• The contact logic of the limit
signal is not correct.
• The limit sensor failed.
The home proxim- • The wiring of the home proxim-
ity input and the ity signal or limit signal is incor-
limit signal in the rect.
direction opposite
• The home proximity sensor or
to the homing direc-
limit sensor is installed in the
tion were detected
wrong location.
during a homing
• The contact logic of the home
operation.
proximity signal or limit signal is
not correct.
• The home proximity sensor or
limit sensor failed.
The home proxim- • The wiring of the home proxim-
ity input and the ity signal or limit signal is incor-
limit signal in the rect.
homing direction
• The home proximity sensor or
were detected at
limit sensor is installed in the
the same time dur-
wrong location.
ing a homing opera-
• The contact logic of the home
tion.
proximity signal or limit signal is
not correct.
• The home proximity sensor or
limit sensor failed.
The home input and • The wiring of the home input
the limit signal in signal or limit signal is incorrect.
the direction oppo-
• The home input sensor or limit
site to the homing
sensor is installed in the wrong
direction were
location.
detected at the
• The contact logic of the home
same time during a
input signal or limit signal is not
homing operation.
correct.
• The home input signal output
device or limit sensor failed.
The home input and • The wiring of the home input
the limit signal in signal or limit signal is incorrect.
the homing direc-
• The home input sensor or limit
tion were detected
sensor is installed in the wrong
at the same time
location.
during a homing
• The contact logic of the home
operation.
input signal or limit signal is not
correct.
• The home input signal output
device or limit sensor failed.
3 Error Tables
Level
Maj Prt Min Obs Info
S NJ-series
CPU Unit
Motion Con-
trol User's
Manual (Cat.
No. W507)
S Same as
above.
S Same as
above.
S Same as
above.
S Same as
above.
S Same as
above.
Reference
3
3-49