Chapter 5 Relay Ladder Logic Programming 118
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Run the program and don’t conduct the M01 contact, DRD4 output value, now, equals to the constant
preset value of AQ01, and AQ01 outputs 9.77V.
Then enable the M01, the DRD4 output value is depending on the value of V01, changing the value of V01
also influences the output value of AQ01 and DRD4.
Example 2: AQ01 preset value refers to other parameters, and the preset value of DRD4 refers to V01.
Run the program, the current/output value of DRD4 will not be affected by V01 even the M01 turns ON, it
only depends on the A01 (AQ01 * 4.095=DRD4).
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