Chapter 5 Relay Ladder Logic Programming 98
-
8BComparator Instructions
The SG2 smart relay includes 31 comparator coils that can be used throughout a program. Each comparator has 8
different operation modes. Additionally, each comparator has 5 parameters for proper configuration. The table below
describes each configured parameter, and lists each compatible element for configuring Comparators.
※ The preset value ②, ③ and ④ can be a constant or refer to other function current value.
Comparator Mode 0 (Internal Coil)
Mode 0 Comparator (Internal Coil) used as internal auxiliary coils. No preset value. In the example below shows
the relationship among the numbered block diagram for a Mode 0 Comparator, the ladder diagram view, and the
software Edit Contact/Coil dialog box.
Analog comparator Mode 1~7
(1) Analog Comparator mode 1:
ONAyAxAy ⑤④④ ,
≤−
;
(2) Analog Comparator mode 2: ONAyAx ⑤,≤ ;
(3) Analog Comparator mode 3: ONAyAx ⑤,≥ ;
(4) Analog Comparator mode 4: ONAx ⑤④ ,≥ ;
(5) Analog Comparator mode 5:
ONAx ⑤④ ,≤
;
(6) Analog Comparator mode 6: ONAx ⑤④ ,= ;
(7) Analog Comparator mode 7: ONAx ⑤④ ,≠ ;
Example 1: Analog Signal Compare
Symbol Description
①
Comparison Mode (0~7)
②
Ax analog input value (0.00~99.99)
③
Ay analog input value (0.00~99.99)
④
Reference comparative value, could be constant, or other data code
⑤
Output terminal (G01~G1F)
PDF compression, OCR, web optimization using a watermarked evaluation copy of CVISION PDFCompressor
To Next Page
Loading...
