Mitsubishi Electric MELSEC-L02SCPU User Manual page 83

(d) Zero signal input
• Input a zero signal after the stopper has been contacted. If a zero signal is input before the stopper is
contacted, machine OPR completes at that point. As a result, the OP position deviates and if a zero signal
is input while the axis is decelerating to the creep speed, the motor load also increases because the axis
stops suddenly at the creep speed or higher.
V
Near-point watchdog
• Do not input a zero signal before machine OPR is started. If a zero signal is already input externally when
machine OPR is started, a "Zero signal ON" error (Axis 1 error code: 1200) occurs and machine OPR is
not performed.
Suddenly stopped during
deceleration to the creep speed
ON
Zero signal
CHAPTER 7 POSITIONING FUNCTION
Stopper
t
OFF
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