Automatic control function programming manual ladder language

5.2.7.4 Testing the Bits of a Byte, Word or Long Word
These sequences are used to test all the bits of variable %I900.W.
Sequence 1 - Initialise Index %V100.B
Sequence 2 - Test Each Bit of %I900.W
Programming in Ladder Language
Arithmetic shift left by 1 of the value contained in %V100.B then logic AND with %I900.W (if %V100.B == 0, test bit
0 of %I900.W; if %V100.B == 1, test bit 1 of %I900.W and so forth). Result different from 0. The TRUE coil is activated
if the bit tested is equal to 1 and the FALSE coil is activated if the bit tested is equal to 0.
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