Mitsubishi Electric MELSEC Q Series User Manual page 235

(b) Stop during deceleration of major positioning control or JOG operation
If an error (a cause of a stop) occurs during deceleration of major positioning control or JOG operation, the
deceleration continues and the operation stops since it is toward completion of the positioning or is following a
change (from on to off) of a JOG start signal (Y24, Y25). In case of major positioning control, Positioning
complete signal (X15) turns on at its completion.
This process is the same for a stop with an error.
The following figure is the timing chart of when Stop signal (Y27) is turned on during deceleration of positioning
control.
v
Positioning start signal
OFF
(Y21 to Y23)
BUSY signal
OFF
(X14)
Positioning complete signal
OFF
(X15)
Stop signal
OFF
(Y27)
Error detection signal
*1 OFF
(X18)
Executed by the QD73A1
*1 Error detection signal (X18) does not turn on in case of a stop following a change (from off to on) of Stop signal (Y27) or
an input of Stop signal (STOP). Error detection signal (X18) turns on due to the following.
• Servo READY signal (READY) turned off.
• PLC READY signal (Y2D) was turned off.
• Upper limit signal (FLS) turned off.
• Lower limit signal (RLS) turned off.
ON
ON
CHAPTER 12 STOPPING AND RESTARTING CONTROL
ON
ON
12
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