Delta Electronics VFD-E manual Mrd, Mpp

Appendix D How to Use PLC Function

Explanations:

To save contents of the accumulative register into the operation result. (the result operation pointer pluses 1)

Mnemonic

MRD

Operand

Function

Reads the current result of the internal PLC operations

None

Explanations:

Reading content of the operation result to the accumulative register. (the pointer of operation result doesn’t move)

Mnemonic

MPP

Operand

Function

Reads the current result of the internal PLC operations

None

Explanations:

Reading content of the operation result to the accumulative register. (the stack pointer will decrease 1)

Program Example:

Ladder diagram:

X0	MPS
	X1
	Y1
	X2
MRD	M0
	Y2
MPP	END

Command code:		Operation:
LD	X0	Load contact A of X0
MPS		Save in stack
AND	X1	Connect to contact A of X1 in
		series
OUT	Y1	Drive Y1 coil
MRD		Read from the stack (without
		moving pointer)
AND	X2	Connect to contact A of X2 in
		series
OUT	M0	Drive M0 coil
MPP		Read from the stack
OUT	Y2	Drive Y2 coil
END		End program

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-35