Chapter 16 PLC Function Applications│CP2000 
 
 
16-50
Command  Function 
ANDF 
Reverse edge detection series connection   
Operand   
X0–X17  Y0–Y17  M0–M799  T0–159  C0–C79  D0–D399 
         
- 
 
The ANDF command is used for a contact falling edge detection series connection.   
 
Ladder diagram:   
X1
Y1
X0
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ANDF 
X1 
X1 Reverse edge 
detection series 
connection   
OUT  Y1  Drive Y1 coil   
 
Command  Function 
ORP 
Forward edge detection parallel connection   
Operand   
X0–X17  Y0–Y17  M0–M799  T0–159  C0–C79  D0–D399 
         
- 
 
The ORP command is used for a contact rising edge detection parallel connection.   
 
Ladder diagram:   
X0
X1
Y1
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ORP 
X1 
X1 Forward edge 
detection parallel 
connection   
OUT  Y1  Drive Y1 coil   
 
Command  Function 
ORF 
Reverse edge detection parallel connection   
Operand   
X0–X17  Y0–Y17  M0–M799  T0–159  C0–C79  D0–D399 
         
- 
 
The ORF command is used for contact falling edge detection parallel connection.   
 
Ladder diagram:   
X0
X1
Y1
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ORF 
X1 
X1 Reverse edge 
detection parallel 
connection   
OUT  Y1  Drive Y1 coil