Specifications

6. Basic Instructions
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6-4
ORB instruction performs the OR operation of block A and Block B, and
uses it as an operation result.
ORB performs parallel connection of circuit block with two or more
contacts. For parallel connection of circuit blocks which have only one
contact, OR and ORI are used and ORB is not required.
The symbol of ORB is not a contact symbol but a connect symbol.
ORB can be written consecutively up to 8 times. If more ORBs are
written consecutively, error indication is given by self-check function and
corresponding error code is stored in special register D1004.

ORB
Block A
Block B
ORB
Y1
Instruction Operands
MPS / MRD / MPP None
MPS:
Stores the operation result (ON/OFF) immediately preceding the MPS
instruction.
The MPS instuction can be used up to 8 times. However, if an MPP
instruction is used between any two MPS instructions, then the total
number of MPS instructions is reduced by 1.
MRD:
Reads the operation result stored by the MPS instruction, and uses the
operation result, starting at the next step.
MPP:
Reads the operation result stored by the MPS instruction, and uses the
operation result, starting at the next step.

X0 X1
X2
M0
MPP
MRD
MPS
LD X0
MPS
AND
OUT
MRD
AND
OUT
MPP
OUT
END
X1
Y1
X2
Y2
Y1
Y2
END
Ladder Diagram
Commands
 Output Instructions
Instruction Operands
S0~S127 X0~X177 Y0~Y177 M0~M1279 T0~T127
C0~C127
C235~C254
OUT

This instruction outputs the operation result for the elements preceding
the OUT instruction.

Y1
OUT Y1
OUT Instruction
Contact
Operation
Result
Coil
No contact NC contact
OFF OFF Non-continuity Continuity
ON ON Continuity Continuity