Mitsubishi Electric MELSEC Q Series User Manual page 233

An emergency stop circuit should be built outside the programmable controller.
(2) Stop during OPR
If an error (a cause of a stop) occurs during OPR, a deceleration stop starts at the error occurrence.
At the completion of the deceleration stop, OPR request signal (X12) stays on. Also, OPR complete signal (X13)
does not turn on since the OPR was not completed normally.
The following figure is the timing chart of when Stop signal (Y27) is turned on during OPR.
v
OPR start signal
(Y20)
BUSY signal
(X14)
OPR request signal
(X12)
OPR complete signal
(X13)
Stop signal
(Y27)
Error detection signal
(X18)
Md.3
Error code (ERR.1)
Executed by the QD73A1
ON
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
0
CHAPTER 12 STOPPING AND RESTARTING CONTROL
Deceleration start
Near-point dog
Zero signal
ON
ON
102 (STOP signal ON during OPR)
12
t
231