Servo Motor Incorrect Wiring Detection Function [G] - Mitsubishi Electric MELSERVO-J5 User Manual

Servo motor incorrect wiring detection function [G]

This function detects incorrect wiring of a servo motor power cable or encoder cable of the multi-axis servo amplifier. Upon
detection of incorrect wiring, [AL. 139 Open-phase error] occurs. This function can prevent fires that originate in the servo
motor due to incorrectly wiring a servo amplifier to servo motors of wrong capacities. Incorrect wiring refers to when the servo
motor power cable and the encoder cable are connected to servo motors which are different from the intended ones.
• For MR-J5D_-_G_, this function cannot be used.
• Enabling this function on other than the MR-J5W_-_G_ triggers [AL. 037 Parameter error].
• If [Pr. PC05.0 Motor-less operation selection] is set to "1" (enabled), incorrect wiring will not be detected
even if the servo motor incorrect wiring detection function has been enabled.
• The servo motor incorrect wiring detection function will not operate even if the servo amplifier becomes in
the servo-on state during the servo motor rotation. Execute the servo motor incorrect wiring detection
function while the servo motor is stopped.
Precautions
• When the servo motor incorrect wiring detection function is enabled, the servo motor may move as follows between the
servo-on command and the actual servo-on: up to one pole pitch for a rotary servo motor, and up to one revolution for a
linear servo motor.
• The servo motor incorrect wiring detection function will be executed at servo-on. When the servo motor incorrect wiring
detection function is enabled, the time until the servo amplifier actually enters in the servo-on state after turning on the
servo-on command may be extended by up to 3.0 s.
• This function is executed at servo-on of each axis.
• If the stoke limit is detected, the servo motor incorrect wiring detection function will be stopped. For servo amplifiers with
firmware version D4 or later, [AL. 139.4_Limit detection error at servo motor incorrect wiring detection] occurs.
• The incorrect wiring may not be detected when different servo motors with similar capacities are wired incorrectly.
• Do not use this function when using a servo motor not manufactured by Mitsubishi Electric. Otherwise, a large current may
flow because of this function.
4 APPLICABLE FUNCTIONS
374
4.20 Disconnection/incorrect wiring detection function