Mitsubishi A1SD75M3

12 - 78
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
12.7.3 M code output function
The "M code output function" is used to command auxiliary work (clamping, drill
rotation, tool replacement, etc.) related to the positioning data being executed.
When the M code ON signal (XD, XE, XF) is turned ON during positioning execution, a
No. called the M code is stored in "
Md.32 Valid M code".
These "
Md.32 Valid M code" are read from the PLC CPU, and used to command
auxiliary work. M codes can be set for each positioning data. (Set in setting item
"
Da.9 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".
(1) M code ON signal output timing
(2) M code OFF request
(3) Precautions during control
(4) Setting the M code output function
(5) 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.32 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 (XD, XE, XF) is turned ON at the positioning start,
and the M code is stored in "
Md.32 Valid M code".
Md. 32 Valid M code
Cd. 14 M code OFF request
Positioning start signal
BUSY signal
M code ON signal
Positioning
*
*
01
00
m1
m2
* m1 and m2 indicate set M codes.
Dwell time
V
t
1
0
1
00
0
OFF
OFF
OFF
ON
ON
Da. 1 Operation pattern
[X4,X5,X6]
[Y10, Y11, Y12]
[XD,XE,XF]
ON
Fig. 12.38 M code ON/OFF timing (WITH mode)