Basler BE1-CDS220, Instruction Manual

Page: 101 / 476

BE1-CDS220 Protection and Control 4-35
Mode 2, One-Shot Nonretriggerable Timer
The one-shot nonretriggerable timer starts its timing sequence when the INITIATE input expression
changes from FALSE to TRUE. See Figure 4-32. The timer will time for DELAY time T1 and then the
output will toggle to TRUE for DURATION time T2. Additional initiate input expression changes of state
are ignored until the timing sequence has been completed. If the duration time (T2) is set to 0, this timer
will not function. The timer will return to FALSE if the BLOCK input becomes TRUE.
D2843-09
10-23-03
Figure 4-32. Mode 2, One-Shot Nonretriggerable Timer
Mode 3, One-Shot Retriggerable Timer
This mode of operation is similar to the one shot nonretriggerable mode, except that if a new FALSE-to-
TRUE transition occurs on the
INITIATE
input expression, the output is forced to logic FALSE and the
timing sequence is restarted. See Figure 4-33.
Figure 4-33. Mode 3, One Shot Retriggerable Timer
Mode 4, Oscillator
In this mode, the INITIATE input is ignored. See Figure 4-34. If the BLOCK input is FALSE, the output,
x62, oscillates with an ON time of T1 and an OFF time of T2. When the BLOCK input is held TRUE, the
oscillator stops and the output is held OFF.
Figure 4-34. Mode 4, Oscillator