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Chapter 13 Control Sub Functions
[QD77MS4 operation example]
Da. 1 Operation pattern
Md. 25 Valid M code
Cd. 7 M code OFF request
11 0011
Warning occurs at this timing.
t
m1 m3
m2
V
1
OFF
ON
OFF
OFF
ON
ON
0 1
0
0
Positioning start signal
BUSY signal
M code ON signal
Positioning
1: m1 and m3 indicate set M codes.
[XC, XD, XE, XF]
[Y10, Y11, Y12, Y13]
[X4, X5, X6, X7]
1 1 1
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
Fig. 13.42 Warning due to an M code ON signal during continuous path control
POINT
If the M code output function is not required, set a "0" in setting item "[Da.10] M
code/Condition data No./Number of LOOP to LEND repetitions" of the positioning
data.
[3] Precautions during control
(1) During interpolation control, the reference axis M code ON signal is turned
ON.
(2) The M code ON signal will not turn ON if "0" is set in "[Da.10] M
code/Condition data No./Number of LOOP to LEND repetitions". (The M
code will not be output, and the previously output value will be held in
"[Md.25] Valid M code".)
(3) If the M code ON signal is ON at the positioning start, the error "M code ON
signal start" (error code: 536) will occur, and the positioning will not start.
(4) If the PLC READY signal [Y0] is turned OFF, the M code ON signal will turn
OFF and "0" will be stored in "[Md.25] Valid M code".
(5) If the positioning operation time is short during continuous path control,
there will not be enough time to turn OFF the M code ON signal, and the
warning "M code ON signal ON" (warning code: 503) may occur. In this
case, set a "0" in the "[Da.10] M code/Condition data No./Number of LOOP
to LEND repetitions" of that section's positioning data to prevent the M
code from being output for avoiding the warning occurrence.
(6) In the AFTER mode during speed control, the M code is not output and the
M code ON signal does not turn ON.
(7) If current value changing where "9003" has been set to "[Cd.3] Positioning
start No." is performed, the M code output function is made invalid.