Chapter 16 PLC Function Applications│CP2000 
 
 
16-44
Command  Function 
ORI 
Connect contact b in parallel   
Operand   
X0–X17  Y0–Y17  M0–M799  T0–159  C0–C79  D0–D399 
         
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The ORI command is used to establish a parallel connection to contact b; its function 
is to first read current status of the designated series contact and logical operation 
results before contact in order to perform "OR" operation; saves results in cumulative 
register.   
 
Ladder diagram:   
X0
X1
Y1
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ORI  X1 
Create series 
connection to contact b 
of X1   
OUT  Y1  Drive Y1 coil   
 
Command  Function 
ANB 
Series circuit block 
Operand    N/A 
 
NB performs an "AND" operation on the previous saved logic results and the current 
cumulative register content.   
 
Ladder diagram:   
X1
X3
Y1
X0
X2
ANB
Block A
Block B
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ORI  X2 
Establish parallel 
connection to contact b 
of X2 
LDI  X1  Load Contact b of X1   
OR  X3 
Establish parallel 
connection to contact a 
of X3   
ANB 
  Series circuit block 
OUT  Y1  Drive Y1 coil   
 
Command  Function 
ORB 
Parallel circuit block 
Operand    N/A 
 
ORB performs an "OR" operation on the previous saved logic results and the current 
cumulative register content.   
 
Ladder diagram:   
X1
X3
Y1
X0
X2
ORB
Block A
Block B
 
Command code:    Description: 
LD  X0  Load Contact a of X0   
ANI  X1 
Establish parallel 
connection to contact b 
of X1 
LDI  X2  Load Contact b of X2   
AND  X3 
Establish parallel 
connection to contact a 
of X3   
ORB 
  Parallel circuit block 
OUT  Y1  Drive Y1 coil