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>=1 : OR Logic Operation



Symbol


Parameter
Data Type
Memory Area
Description
<address>
BOOL
I, Q, M, T, C, D, L
The address indicates the bit whose signal state will be checked.


Description

With the OR instruction, you can check the signal states of two or more specified addresses at the inputs of an OR box.

If the signal state of one of the addresses is 1, the condition is satisfied and the instruction produces the result 1. If the signal state of all addresses is 0, the condition is not satisfied and the instruction produces the result 0.

If the OR instruction is the first instruction in a string of logic operations, it saves the result of its signal state check in the RLO bit.

Each OR instruction that is not the first instruction in the string of logic operations combines the result of its signal state check with the value stored in the RLO bit. These values are combined according to the OR truth table.


Status Word
BR
CC 1
CC 0
OV
OS
OR
STA
RLO
FC
writes
-
-
-
-
-
X
X
X
1


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