M Code Output Function - Mitsubishi Electric MELSEC-L LD75P User Manual

12.7.3

M code output function

The "M code output function" is used to command sub work (clamping, drill rotation, tool replacement, etc.) related to
the positioning data being executed.
When the M code ON signal [X4, X5, X6, X7] is turned ON during positioning execution, a No. called the M code is
stored in "[Md.25] Valid M code".
These "[Md.25] Valid M code" are read from the CPU module, and used to command auxiliary work. M codes can be
set for each positioning data. (Set in setting item "[Da.10] M code" of the positioning data.)
The timing for outputting (storing) the M codes can also be set in the "M code output function".
The details shown below explain about the "M code output function".
• M code ON signal output timing
• M code OFF request
• Control precautions
• Setting method
• Reading M codes
(1) M code ON signal output timing
The timing for outputting (storing) the M codes can be set in the "M code output function". (The M code is stored
in "[Md.25] Valid M code" when the M code ON signal is turned ON.)
The following shows the two types of timing for outputting M codes: the "WITH" mode and the "AFTER" mode.
(a) WITH mode
The M code ON signal [X4, X5, X6, X7] is turned ON at the positioning start, and the M code is stored in
"[Md.25] Valid M code".
Positioning start signal
[Y10, Y11, Y12, Y13]
BUSY signal
[XC, XD, XE, XF]
M code ON signal
[X4, X5, X6, X7]
Cd.7
Md.25
Positioning
Da.1
580
ON
OFF
ON
OFF
ON
OFF
M code OFF request
0 1 0
Valid M code
m1
V
Operation pattern
0 1 0
m2
Dwell time
01 00
m1 and m2 indicate set M codes.
t