Mitsubishi Electric E80 Series, Maintenance Manual

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M800/M80/E80 Series Maintenance Manual
4 Failure Diagnosis
94 IB-1501273-F
4.7 Diagnosis Based on the Drive Monitor Screen
4.7.1 Drive Monitor Screen (Servo Unit)
The various data related to the servo axis (NC axis, PLC axis) can be monitored by selecting the menus [Drv mon] -> [Servo
unit] on the diagnosis (Diagn) screen.
Change the display item with or .
The axis name set in the base axis specification parameter "#1022 axname2" appears at the axis name.
Display items
Display items Details
Gain (1/s) This displays the position loop gain. The position loop gain is obtained by the following
formula:
Droop (i) The error of the actual machine position to the command position is called droop. This
error is proportional to command speed value.
This follows the setting and display unit (#1003 iunit).
Speed (r/min) This displays the actual rotation speed of motor.
Feedrate (mm/s) This displays the feedrate on the machine end.
Load current (%) This displays the FB value of the motor current in terms of continuous current during
stalling.
Max current 1 (%) This displays the motor current command in terms of continuous current during stall-
ing.
An absolute value of the current command peak value sampled after the power ON is
displayed.
Max current 2 (%) This displays the motor current command in terms of continuous current during stall-
ing.
An absolute value of the current command peak value sampled in most recent 2 sec-
onds is displayed.
Diagn
Feedrate (mm/s)
Tracking delay error (mm)