LSIS Master-K K1000S - Timers

Chapter 4 CPU modules MASTER-K
4-5
4.2.5 Timers
The MASTER-K 200S/300S/1000S series uses upcount timers. There are 5 timer
instructions such as on-delay (TON), off-delay (TOFF), integral (TMR), monostable
(TMON), and re-triggerable (TRTG) timer.
The measuring time range of 100msec timer is 0.1 ~ 6553.5 sec, and that of 10msec
timer is 0.01 ~ 655.35 sec. Please refer the ‘MASTER-K programming manual’ for details.
1) On delay timer
The current value of timer starts to increase from 0 when the input condition of TON
instruction turns on. When the current value reaches the preset value, the timer output
relay turns on.
When the timer input condition is turned off, the current value becomes 0 and the timer
output relay is turned off.
2) Off delay timer
The current value of timer set as preset value and the timer output relay is turned on
when the input condition of TOFF instruction turns on. When the input condition is turned
off, the current value starts to decrease. The timer output relay is turned off when the
current value reaches 0.
Timer in
p
ut condition
Timer out
p
ut rela
y
Preset value
(
PV
)
Current value
t1
Timer in
p
ut condition
Timer out
p
ut rela
y
Preset value
(
PV
)
Current value
t1
t2 t3
t3 + PT t1 + PT
PT PT
PT PT
t2 t3
t3 + PTt1 + PT