Mitsubishi Electric A173UHCPU User Manual page 119

5. INSPECTION AND MAINTENANCE
(3) Checking by monitoring from the peripheral device
Use the peripheral device monitor functions to determine the control status.
The following statuses can be determined.
Refer to the appropriate peripheral software package operating manual for
details about the operating procedures.
(a) Present value monitor
Displays servomotor present value addresses and error codes. It permits
the present control status to be checked.
(b) Scroll monitor
Monitor the servo program and motion program operating status, operating
axes, and instruction execution in real time. Permit the program operating
status to be checked.
(c) Error list monitor
Displays the error code history.
Allows error codes to be checked after multiple errors occur and permits
past error codes to be checked.
(d) Trace graph
Graphic display of position command value, position droop, speed
command values, servomotor speed, and motor current. The suitability of
the servomotor for the machine (factors such as overload status) can be
checked by monitoring the servomotor current value.
5 − 8