Delta VFD300C43S-HS User Manual page 686

Chapter 16 PLC Function ApplicationsC2000-HS
Command
Parallel circuit block
ORB
Operand
ORB performs an "OR" operation on the previously saved logic results and the current
cumulative register content.
Ladder diagram:
Command
MPS Save to stack
Operand
Save current content of cumulative register to the stack. (Add one to stack pointer)
Command
MRD Read stack (pointer does not change)
Operand
Reads stack content and saves to cumulative register. (Stack pointer does not
change)
Command
MPP Read stack
Operand
Retrieves result of previously-save logical operation from the stack, and saves to
cumulative register. (Subtract one from stack pointer)
Ladder diagram:
X0
Block A
X0 X1
X2 X3
Block B
MPS
X1
X2
MRD
MPP
Function
N/A
Command code:
LD
Y1
ANI
ORB
LDI
AND
ORB
OUT
Function
N/A
Function
N/A
Function
N/A
Command code:
LD
MPS
Y1
AND
M0
OUT
Y2
MRD
END
AND
OUT
MPP
OUT
END
16-44
Description:
X0 Load Contact a of X0
Establish parallel
X1 connection to contact b
of X1
X2 Load Contact b of X2
Establish parallel
X3 connection to contact a
of X3
Parallel circuit block
Y1 Drive Y1 coil
Description:
Load Contact a of X0
X0
Save to stack
Create series
connection to contact a
X1
of X1
Drive Y1 coil
Y1
Read stack (pointer
does not change)
Create series
X2 connection to contact a
of X2
Drive M0 coil
M0
Read stack
Drive Y2 coil
Y2
Program conclusion