Mitsubishi Electric MELSEC iQ-R-RD75P4 User Manual page 45

Precautions during the operation
• Start at OP (Error code: 1940H) will occur if another machine OPR is attempted after the completion of the machine OPR
when the OPR retry function has not been set ([Pr.48] OPR retry is 0).
• When the machine OPR is started at a point where the near-point dog is on, the machine starts moving at the speed set in
[Pr.47] Creep speed.
• The near-point dog must be on during the deceleration from the OPR speed to the speed set in [Pr.47] Creep speed. The
workpiece will continue decelerating and stop if the near-point dog is turned off before it has decelerated to the creep
speed, causing Dog detection timing fault (Error code: 1941H).
• If the OPR retry function has not been set ([Pr.48] OPR retry is 0) and an OPR operation is performed in the situation
above, the machine moves until it reaches a limit switch and Hardware stroke limit (+)/Hardware stroke limit (-) (Error code:
1905H/1907H) will occur. In this case, perform the manual control to move the workpiece to a position closer to the start
position than the near-point dog and perform the OPR operation again.
Machine OPR start OFF
(Positioning start signal)
[Y10, Y11, Y12, Y13]
OPR request flag
OFF
Status: b3
Md.31
OPR complete flag OFF
Md.31
Status: b4
Md.26 Axis operation status
Standby OPR
Movement amount
Md.34
Inconsistent
after near-point dog
ON
Md.20
Current feed value
Inconsistent
Md.21
Machine feed value
• When the machine OPR has been stopped by a stop signal, perform the machine OPR again. If Restart command is turned
on after the stop by a stop signal, OPR restart not possible (Error code: 1946H) occurs.
V
Pr.46 OPR speed
ON
Near-point dog OFF
ON
ON
0
A value of the movement amount is stored.
Creep speed
Pr.47
t
Error
Address at stop
2
2 OPR CONTROL
43
2.2 Machine OPR