Chapter 4 Relay Ladder Logic Programming 71
Analog comparator Mode 1~5
When the relay of analog comparator is ON, there are 5 operation modes described below:
(1) Analog Comparator mode 1 ( AY - ⑥ ≤ AX≤ AY +⑥， ⑦ ON)
(2) Analog Comparator mode 2 (AX ≤ AY, ⑦ ON)
(3) Analog Comparator mode 3 (AX ≥ AY, ⑦ ON)
(4) Analog Comparator mode 4 ( ⑥ ≥ AX, ⑦ ON)
(5) Analog Comparator mode 5 ( ⑥ ≤ AX, ⑦ ON)
Example 1: Analog Signal Compare
In the example below, Mode 4 is the selected function that compares the value of analog input A1 to a constant
value (N) of 2.50. Status coil G1 turns ON is A1 is <= to 2.50.
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