Omron NJ501-1300, User Manual, Page: 382 / 432

11 Troubleshooting
11-36
NJ-series CPU Unit Motion Control User’s Manual (W507)
Event name Home Proximity/Homing Direction Limit Input Detected Event code 74280000 hex
Meaning The home proximity input and the limit signal in the homing direction were detected at the same time during a homing
operation.
Source Motion Control Function Module Source details Axis Detection
timing During instruc-
tion execution
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation The axis stops with the stop method for the homing execu-
tion status.
System-defined
variables Variable Data type Name
_MC_AX[*].MFaultLvl.Active BOOL Axis Minor Fault Occurrence
Cause and
correction Assumed cause Correction Prevention
The wiring of the home proximity sig-
nal or limit signal is incorrect. Correct the wiring of the home prox-
imity signal or limit signal. Check to see if any of the conditions
that are given as causes exist in
advance.
The home proximity sensor or limit
sensor is installed in the wrong loca-
tion. Correct the installation location of the
home proximity sensor or limit sensor
so that they do not turn ON at the
same time.
The contact logic of the home proxim-
ity signal or limit signal is not correct. Correct the contact logic (N.C./N.O.)
of the home proximity sensor or limit
sensor.
The home proximity sensor or limit
sensor failed. Replace the home proximity sensor or
limit sensor.
Attached
information None
Precautions/
Remarks None
Event name Home Input/Homing Opposite Direction Limit Input
Detected Event code 74290000 hex
Meaning The home input and the limit signal in the direction opposite to the homing direction were detected at the same time
during a homing operation.
Source Motion Control Function Module Source details Axis Detection
timing During instruc-
tion execution
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation The axis stops with the stop method for the homing execu-
tion status.
System-defined
variables Variable Data type Name
_MC_AX[*].MFaultLvl.Active BOOL Axis Minor Fault Occurrence
Cause and
correction Assumed cause Correction Prevention
The wiring of the home input signal or
limit signal is incorrect. Correct the wiring of the home input
signal or limit signal. Check to see if any of the conditions
that are given as causes exist in
advance.
The home input sensor or limit sensor
is installed in the wrong location. Correct the installation location of the
home input sensor or limit sensor so
that they do not turn ON at the same
time.
The contact logic of the home input
signal or limit signal is not correct. Correct the contact logic (N.C./N.O.)
of the home input signal or limit sen-
sor.
The home input signal output device
or limit sensor failed. Replace the home input signal output
device or limit sensor.
Attached
information None
Precautions/
Remarks None