Delta Electronics AC Motor Drive VFD-E - Manual (Page 318)

Appendix D How to Use PLC Function|
Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11 D-35
Explanations:
To save contents of the accumulative register into the operation result. (the result operation pointer
pluses 1)
Mnemonic Function
MRD Reads the current result of the internal PLC operations
Operand None
Explanations:
Reading content of the operation result to the accumulative register. (the pointer of operation result
doesn’t move)
Mnemonic Function
MPP Reads the current result of the internal PLC operations
Operand None
Explanations:
Reading content of the operation result to the accumulative register. (the stack pointer will decrease
1)
Program Example:
Ladder diagram: 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
X0
Y1
X1
M0
X2
Y2
END
MPP
MRD
MPS
END End program