Rockwell Automation 1503VC IntelliVAC Plus Contactor Control Module - Manual (Page 140)

DeviceLogix 9-17
1503-UM054C-EN-P – June 2013
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 TRUE.
Figure 9.7 – Timing Diagram for the On-Delay Timer
Table 9.E – On Delay Timer Valid Data Ranges
Parameters Data Range
PRE 0 ~ 65535
ACC 0 ~ 65535
Time Base 0 (1 ms), 1 (10 ms)
Off Delay Timer
The off-delay timer works the same way as the on-delay timer but
instead of delaying the TRUE status of the output it delays the
FALSE status of the output. The input to the timer is a level
sensitive FALSE with an edge-triggered reset on the FALSE to
TRUE transition. This means that when the input is false, the timer
increments the accumulator and when the input goes TRUE the timer
resets the accumulator. For each timebase unit of time, the timer
increments the accumulator. When the accumulator reaches the
preset value, the timer sets the output to FALSE. The timer
maintains the output FALSE status as long as the input remains
FALSE. When the input changes from FALSE to TRUE, the timer
sets the output TRUE and reset the accumulator. If the input goes
true before the time period specified by the timebase and preset, the