LSIS XBC-DN40SU - Page 58

Chapter 5 Program Configuration and Operation Method
5- 7
(3) Integral timer
In general, its operation is same as on-delay timer. Only the difference is the current value will not be clear
when the input condition of TMR instruction is turned off. It keeps the elapsed value and restart to
increase when the input condition is turned on again. When the current value reaches preset value, the
timer output relay is turned on.
The current value can be cleared by the RST instruction only.
(4) Monostable timer
In general, its operation is same as off-delay timer. However, the change of input condition is ignored
while the timer is operating (decreasing). When current value reaches preset value the timer output relay
is turned off and current value is cleared.
Timer input
condition
Timer output relay
Preset value
Current value
Timer reset input
t0
t1
t2
t5
t1
t0
t2
t5+PT
t5
t3
PT = (t1-t0)+(t3-t2)
t4
t1
t0
t2
t4
Timer input
condition
Timer output relay
Preset value
Current value
t0
t1
t2
t3
t4
t0
t2
t0+PT
t2+PT
t4+PT
t4
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