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12 CONTROL AUXILIARY FUNCTIONS
Positioning start signal
BUSY signal
M code ON signal
M code OFF request
Valid M code
Positioning
Da. 1 Operation pattern
Fig. 12.39 Warning due to an M code ON signal during continuous path control
[RY(n+1)0, RY(n+1)1]
[RXn4, RXn5]
[RXnD, RXnE]
[RY(n+2)6, RY(n+4)6]
[RWrn+4, RWrn+12]
* : m1 and m3 indicate set M codes.
POINT
If the M code output function is not required, set a "0" in setting item " Da.9 M
code" of the positioning data.
(3) Precautions during control
(a) During interpolation control, the reference axis M code ON signal is turned
ON.
(b) The M code ON signal will not turn ON if "0" is set in " Da.9 M code". (The
M code will not be output, and the previously output value will be held in
"Valid M code (RWrn+4, RWrn+12)".)
(c) If the M code ON signal is ON at the positioning start, an error "M code ON
signal ON start" (error code: 536) will occur, and the positioning will not start.
(e) If the remote station READY signal [RX(n+7)B] is turned OFF, the M code
ON signal will turn OFF and "0" will be stored in "Valid M code (RWrn+4,
RWrn+12)".
(f)
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 a warning
may occur. In this case, set a "0" in the " Da.9 M code" of that section's
positioning data.
(g) In the AFTER mode under speed control, the M code is not output and the
M code ON signal does not turn ON.
ON
OFF
ON
OFF
ON
OFF
ON
OFF
m1
m2
*
*
V
11
11
12 - 62
MELSEC-A
m3
*
00
Warning occurs at this timing.
t
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