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12 CONTROL SUB FUNCTIONS
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 "
These "
auxiliary work. M codes can be set for each positioning data. (Set in setting item
"
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
Positioning start signal
BUSY signal
M code ON signal
Cd. 7 M code OFF request
Md. 25 Valid M code
Positioning
Da. 1 Operation pattern
Md.25
Valid M code" are read from the PLC CPU, and used to command
Da.10
M code" of the positioning data.)
[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
The timing for outputting (storing) the M codes can be set in the "M code output
function". (The M code is stored in "
signal is turned ON.)
The following shows the two types of timing for outputting M codes: the "WITH"
mode and the "AFTER" mode.
(1) 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 "
OFF
[Y10, Y11, Y12, Y13]
[XC, XD, XE, XF]
OFF
OFF
[X4, X5, X6, X7]
0
V
m1 and m2 indicate set M codes.
Fig. 12.38 M code ON/OFF timing (WITH mode)
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Md.25
Md.25
Valid M code" when the M code ON
Md.25
ON
ON
ON
0
1 0
1 0
m1
m2
Dwell time
01
12 - 66
MELSEC-Q
Valid M code".
Valid M code".
t
00
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