Mitsubishi Electronics Comprehensive Guide to M Code Output Functions for QD75D Controllers

12CONTROL SUB FUNCTIONS

[4]Setting the M code output function

MELSEC-Q

The following shows the settings to use the "M code output function".

(1)Set the M code No. in the positioning data " Da.10 M code".

(2)Set the timing to output the M code ON signal (X4, X5, X6, X7).

Set the required value in the following parameter, and write it to the QD75. The set details are validated at the rising edge (OFF ON) of the PLC READY signal (Y0).

			Setting		Buffer memory address
	Setting item			Setting details	Axis	Axis	Axis	Axis
			value
					1	2	3	4
		M code ON signal		Set the timing to output the M code ON signal.
Pr.18				0: WITH mode	27	177	327	477
		output timing		1: AFTER mode

Refer to Section 5.2 "List of parameters" for setting details.

[5] Reading M codes

"M codes" are stored in the following buffer memory when the M code ON signal turns ON.

			Monitor				Buffer memory address
	Monitor item			Storage details			Axis	Axis	Axis	Axis
			value
							1	2	3	4
				The M code No. (		M code) set in the
					Da.10
Md.25		Valid M code					808	908	1008	1108
				positioning data is stored.

Refer to Section 5.6 "List of monitor data" for information on the storage details.

The following shows a sequence program example for reading the " Md.25

M code" to the PLC CPU 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".

Valid

Example

M code ON signal

FROM H0 K808 D110 K1

ON execution command

D110: valid M codes

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