Omron NJ501-1300, User Manual, Page: 360 / 432

11 Troubleshooting
11-14
NJ-series CPU Unit Motion Control User’s Manual (W507)
74270000 hex Home Prox-
imity/Homing
Opposite
Direction
Limit Input
Detected The home proxim-
ity input and the
limit signal in the
direction opposite
to the homing direc-
tion were detected
during a homing
operation. • The wiring of the home proxim-
ity signal or limit signal is incor-
rect.
• The home proximity sensor or
limit sensor is installed in the
wrong location.
• The contact logic of the home
proximity signal or limit signal is
not correct.
• The home proximity sensor or
limit sensor failed.
√
page 11-35
74280000 hex Home Prox-
imity/Homing
Direction
Limit Input
Detected The home proxim-
ity input and the
limit signal in the
homing direction
were detected at
the same time dur-
ing a homing opera-
tion. • The wiring of the home proxim-
ity signal or limit signal is incor-
rect.
• The home proximity sensor or
limit sensor is installed in the
wrong location.
• The contact logic of the home
proximity signal or limit signal is
not correct.
• The home proximity sensor or
limit sensor failed.
√
page 11-36
74290000 hex Home
Input/Hom-
ing Opposite
Direction
Limit Input
Detected The home input and
the limit signal in
the direction oppo-
site to the homing
direction were
detected at the
same time during a
homing operation. • The wiring of the home input
signal or limit signal is incorrect.
• The home input sensor or limit
sensor is installed in the wrong
location.
• The contact logic of the home
input signal or limit signal is not
correct.
• The home input signal output
device or limit sensor failed.
√
page 11-36
742A0000 hex Home
Input/Hom-
ing Direction
Limit Input
Detected The home input and
the limit signal in
the homing direc-
tion were detected
at the same time
during a homing
operation. • The wiring of the home input
signal or limit signal is incorrect.
• The home input sensor or limit
sensor is installed in the wrong
location.
• The contact logic of the home
input signal or limit signal is not
correct.
• The home input signal output
device or limit sensor failed.
√
page 11-37
742B0000 hex Invalid Home
Input Mask
Distance The setting of the
home input mask
distance is not suit-
able for the
MC_Home instruc-
tion. • The set value of the home input
mask distance when the oper-
ating mode of the MC_Home
instruction is set to
Proximity
Reverse Turn/Home Input Mask
Distance
is insufficient to decel-
erate from the homing velocity
to the homing approach veloc-
ity.
√
page 11-37
742C0000 hex No Home
Input There was no home
signal input during
the homing opera-
tion. Or, a limit sig-
nal was detected
before there was a
home input. • There was no home signal input
during the homing operation.
• A limit signal was detected
before there was a home input.
√
page 11-38
742D0000 hex No Home
Proximity
Input There was no home
proximity signal
input during the
homing operation. • There was no home proximity
signal input during the homing
operation when a home proxim-
ity input signal was specified.
√
page 11-38
Event code Event name Meaning Assumed cause
Level
Reference
Maj Prt Min Obs Info