Rockwell-automation 1503VC IntelliVAC Plus Contactor Control Module Manual de usuario descargar pdf (Pagina 141)

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1503-UM054C-EN-P – June 2013

output remains TRUE, and the accumulator is cleared, essentially

ignoring the input.

If the timer senses a true level on the reset input at any time during

the operation of the timer, it resets the output to false and clears the

accumulator. Because the reset line is level sensitive, the timer

remains reset until the timer detects a false on the reset input. Also,

because the input is level sensitive, the timer will again begin to

increment the accumulator if the reset line goes FALSE while the

input remains FALSE. However, because the reset logic already set

the output to FALSE, the time delay causes no effect because the

output is already FALSE. If the input is TRUE when the reset goes

FALSE, the timer sets the output to true.

Figure 9.8 – Timing Diagram for the Off-Delay Timer

Table 9.F – Off Delay Timer Valid Data Ranges

Parameters Data Range

PRE

0 ~ 65535

ACC 0 ~ 65535

Time Base 0 (1 ms), 1 (10 ms)

Up Counter

The up counter has two inputs called input and reset and out output

called output. The up counter simply counts up on a FALSE to

TRUE transition and sets its output to TRUE when the accumulator

reaches the present value. The accumulator continues to count up

until the counter is reset or it reaches 65,535. A TRUE value on the

reset input zeroes the accumulator and sets the output to FALSE.

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