Mitsubishi Electric MELSEC-L LD75P User Manual page 587

(5) Reading M codes
"M codes" are stored in the following buffer memory when the M code ON signal turns ON.
Monitor item
[Md.25] Valid M code
Refer to  Page 182, Section 5.6 for information on the storage details.
The following shows a program example for reading the "[Md.25] Valid M code" to the CPU module data register
[D110]. (The read value is used to command the sub work.)
Read M codes not as "rising edge commands", but as "ON execution commands".
Example
M code ON signal
Monitor
Storage details
value
The M code No. ([Da.10] M code) set in the

positioning data is stored.
D110: valid M codes
CHAPTER 12 CONTROL SUB FUNCTIONS
Buffer memory address
Axis 1 Axis 2
808 908
D110
FROM H0 K808 K1
ON execution command
Axis 3 Axis 4
1008 1108
12
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