Mitsubishi Electric MELSEC-L LD75P User Manual page 333

(2) Restrictions
• Always limit the servomotor torque after the "[Pr.47] Creep speed" is reached. If the torque is not limited, the
servomotor may fail when the machine presses against the stopper. (For details, refer to Torque limit function
( Page 532, Section 12.4.2).)
• Use an external input signal as the zero signal.
• The OPR retry function cannot be used in "stopper stop method 3)".
(3) Precautions during operation
• If the zero signal is input before the workpiece stops at the stopper, the workpiece will stop at that position,
and that position will become the OP. At this time, an error will not occur.
Zero signal
Torque limit
Machine OPR start
(Positioning start signal)
[Y10,Y11,Y12,Y13]
OPR request flag
Md.31 Status : b3
OPR complete flag
Md.31 Status : b4
Deviation counter clear output
Md.26 Axis operation status
Movement amount
Md.34
after near-point dog
ON
Current feed value
Md.20
Machine feed value
Md.21
Torque limit stored
Md.35
value
• When a machine OPR is stopped with the stop signal, perform a machine OPR again. If the restart
command is turned ON after a stop with the stop signal, an error "OPR restart not possible" (error code: 209)
occurs.
V
Valid torque limit range
ON
OFF
ON
OFF
OFF
Standing by
In OPR
0
Inconsistent
Inconsistent
Value the machine moved is stored
Inconsistent
OPR torque limit value
Creep speed
Pr.47
Stopper
t
ON
Pr.55 Deviation counter clear
signal output time
Standing by
OP address
CHAPTER 8 OPR CONTROL
331
8