Mitsubishi Electric MELSEC-Q QD75M User Manual page 312

6 PLC PROGRAM USED FOR POSITIONING CONTROL
Positioning start signal
All axis servo ON
PLC READY signal
QD75 READY signal
Start complete signal
BUSY signal
Error detection signal
Cd. 3 Positioning start No.
OPR request flag
[ Md. 31 Status: b3]
OPR complete flag
[ Md. 31 Status: b4]
POINT
The BUSY signal [XC, XD, XE, XF] turns ON even when position control of
movement amount 0 is executed. However, since the ON time is short, the ON
status may not be detected in the PLC program.
(The ON status of the start complete signal [X10, X11, X12, X13], positioning
complete signal [X14, X15, X16, X17] and M code ON signal [X4, X5, X6, X7] can
be detected in the PLC program.)
Starting time chart
The time chart for starting each control is shown below.
(1) Time chart for starting "machine OPR"
V
OFF
[Y10]
OFF
[Y1]
OFF
[Y0]
OFF
[X0]
OFF
[X10]
OFF
[XC]
OFF
[X8]
OFF
OFF
Fig. 6.4 Time chart for starting "machine OPR"
Near-point dog
Zero signal
ON
ON
ON
ON
ON
ON
9001
ON
6 - 59
MELSEC-Q
t
ON