Mitsubishi MELSEC-Q QD77MS, User Manual

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Chapter 8 OPR Control
REMARK
OPR request
(Note-1)
The "OPR request flag" (
Md.31
Status: b3) must be turned ON in the QD77MS,
and a machine OPR must be executed in the following cases.
(1) When not using an absolute position system
(a) This flag turns on in the following cases:
• System's power supply on or reset
• Servo amplifier power supply on
• Machine OPR start
(Unless a machine OPR is completed normally, the OPR request flag does
not turn off.)
(b) This flag turns off by the completion of machine OPR.
(2) When using an absolute position system
(a) This flag turns on in the following cases:
• When not executing a machine OPR once after system start.
• Machine OPR start
(Unless a machine OPR is completed normally, the OPR request flag does
not turn off.)
• Erase of an absolute position data in QD77MS according to causes, such
as battery error (error [1201] occurrence)
• Error [2025] (absolute position erase) occurrence
(Md.108 Servo status (high-order buffer memory address) b14 ON)
• Warning [2143] (absolute position counter warning) occurrence
(Md.108 Servo status (high-order buffer memory address) b14 ON)
Buffer memory address (high-order)
QD77MS2/QD77MS4 QD77MS16
Md.108
Servo status: b14
877+100n 2477+100n
n: Axis No.-1
• When the "Rotation direction selection/travel direction selection (PA14)" of
servo parameter is changed.
(b) This flag turns off by the completion of the machine OPR.
The address information stored in the QD77MS cannot be guaranteed while the
"OPR request flag" is ON.
The "OPR request flag" turns OFF and the "OPR complete flag" (
Md.31
Status:
b4) turns ON if the machine OPR is executed and is completed normally.