LS Industrial Systems XBC-DN10E, Руководство пользователя

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Chapter 5 Programming Concepts
XBC E-Type Main Unit 5-20 Ver. 1
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.
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.
t1+PT
t0 t1 t2
t3
t4
t5
t5+PT
t0
t1
t2
t2 t5
Input condition
Output relay
Preset value
Current value
t0
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