| 작성자 : 웹관리자 |
2006-11-27 오후 6:14:03 조회수 : 7879번 |
|
제목 : AB-PLC[Equal Instruction]-[EQU]
|
.gif)
[MEQ]는 Equal Instruction 의 약어다
Source A [B3:0]의 데이터에 Mask 데이터 Hex [000F] 데이터 와
Source B 데이터를 비교해서 같으면 [O:2/0] Coil On
다시 설명하면 아래와 같다.
SOURCE A-[ 0 0 0 0 | 0 0 0 0 | 0 0 0 0 | 1 1 1 1 ] - Hex[000F]
SOURCE B-[ 0 0 0 0 | 0 0 0 0 | 0 0 0 0 | 1 1 1 1 ] - Hex[000F]
하나 더 예로 설명 하면 타이머 T4:0/ACC(설정치)가 SOURCE A에 도달한 값이
같으면 [O:2/0] Coil On 한다
[SOURCE A] = [SOURCE B]
[-원본글-]
◎-Example Problem1
Develop a ladder rung that will cause the output O:2/0 to be true "on" if the binary bit B3:0 is the
same as the value of B3:1.
In this example, the EQU command compares the value in Source A, which is stored in element 0
of the bit data file (binary word of 15) and is compared to the value in element 1 of the bit data file
(also binary word of 15). If the value of both elements are the same, then the funtion is true and
the output becomes true or "on". If the values are not the same then the EQU command function
produces a false and the output becomes false or "off".
◎-Example Problem2
Develop a second ladder rung that will cause the output O:2/0 to be true "on" if the value of the
accumulator in Time On timer T4:0 has reached a value of 25 seconds.
In the second example the value from the accumulator of the timer T4:0 is compared to a constant
value of 25 stored in B3:0. When the timer reaches 25 seconds the EQU command is evaluated as
true and the output is true for only that second.
|
|
|
Add_File-1 : equab.gif( 2 KB )
Add_File-2 : equab(1).gif( 3.5 KB )
|
|
이전글 보기 : AB-PLC[Masked Comparison for Equal]-[MEQ]
다음글 보기 : AB-PLC Not Equal Instruction [NEQ]
|
