Mitsubishi Electric 700 Series Programming Manual page 121

Sequence Instructions
Program Examples
ANB
Though there are the following two different program coding methods for connecting
ladder blocks in series consecutively, use the coding example 1.
Coding example 1 Coding example 2
ORB
Though there are the following two different program coding methods for connecting
ladder blocks in parallel consecutively, use the coding example 1.
Coding example 1 Coding example 2
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