Chapter 6 Applied Instructions
6-275
API
Instruction code Operand Function
1207 D BON P
S, D, n
Checking the state of the bit
Device
X Y M S T C HC D L SM SR E PR K 16#
“$” DF
16-bit instruction (7 steps)
32-bit instruction (7 steps)
Symbol:
S
Source device Word/Double word
D
Device in which the check result is
stored
Bit
n
Bit whose state is judged Word/Double word
Explanation:
1. The state of the n
th
bit in S is checked, and the result is stored in D.
2. The operand n used in the 16-bit instruction should be within the range between 0 and 15, and
the operand n used in the 32-bit instruction should be within the range between 0 and 31.
3. Only the 32-bit instructions can use the 32-bit counter.
Example:
1. When X0.0 is ON, Y0.1 is ON if the value of the 15
th
bit in D0 is 1. When X0.0 is ON, Y0.1 is
OFF if the value of the 15
th
bit in D0 is 0.
2. When X0.0 is switched OFF, the state of Y0.1 remains the same as that before X0.0’s being
OFF.
0 0 0 1 0 0 1 0 0 0
0 0 0 1
0 0
b0
b15
D0
1 0 0 1 0 0 1 0 0 0
0 0 0 1
0 0
b0
b15
D0
Y0.1=OFF
Y0.1=ON
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