제어강좌 통합 관리자 입니다.
요즘 너무나 바쁜일 때문에 명령어 해설도 못했습니다.
잘들 지내셨지요.
정말 오래 간만에 올리는 것 같군요.
RES 명령은 타이머, 카운터 현재값을 초기화 할때 사용됨니다.
위 이미지는 적산 타이머를 초기화 하는 구문 이군요.
I:1/0 비트가 ON 하면 적산 타이머 T4:0(0.1초)가 동작 하면서 설정치 3초가
되면 T4:0/DN 이 동작 하는 회로 입니다.
만일 T4:0/DN 이 설정치에 도달 하기전에 I:1/0이 OFF 되면
T4:0/DN 이 이전 값을 보존 하게 됩니다.
위 회로는 I:1/1 비트가 동작 하면 T4:0 을 RESET(초기화) 하라는 구문 입니다.
도움이 되었는지요.
밝은 미래를 위하여...
[-원본글-]
Use a RES instruction to reset a timer or counter. When the RES instruction is enabled, it resets the
Timer On Delay (TON), Retentive Timer (RTO), Count Up (CTU), or Count Down (CTD) instruction
having the same address as the RES instruction.
The RES command can be used to reset TON, RTO, CTU, or CTD commands when the address of
the RES command is the same as one of the timer or counter addresses. The RES command is an
output instruction which, when rung conditions are TRUE, resets all Accumulated values to 0
(zero). For timers, the Done bit (DN), Timer Timing bit (TT), and Enable bit (EN) are reset when the
RES command is activated. For counters, the Overflow bit (OV), Underflow bit (UN), Done bit (DN),
Counter up Enable (CU), and Counter down Enable (CD).
NOTE: The RES instruction cannot be used with the TOF instruction because RES always clears
the status bits as well as the accumulated value, this may cause unpredictable machine operation
or injury to personnel.
Develop a ladder program that will cause the Reset instruction to reset the RTO T4:0 when I:1/1
goes TRUE.
In this example the inputs are XIC instructions used to make either rung TRUE or FALSE. Because
the RTO command retains the Accumulator value and Done status even when the rung is FALSE,
the RES command is needed to reset these values. Rung 0001 is used to reset the RTO timer T4:0
depending on input I:1/1. When the rung goes TRUE, because of the RES address (T4:0), the
Accumulator is reset to 0 (zero), the Done, Timer Timing, and Enable bits are reset. Another input
for Rung 0001 could be the DN (T4:0/DN) bit from the RTO T4:0, this way, as soon as the RTO
accumulator reaches its preset value of 30 seconds, the ACC bit will be reset back to 0 (zero) so
the cycle can start over.
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