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Appendix 4.12 Displaying elapsed time and outputting before time limit
The following ladder outputs the time elapsed in the timer on the LED display, and
indicates that the set time limit has been reached. This system can also be applied
to counters.
Y64 to 67
Y60 to 63
Y6C to 6F
Y68 to 6B
3412
Output module
Elapsed time display
(Four digits of BCD)
× 10
× 100
× 0.1
× 1
X2
Starts when turned on
Stops when turned off
X2
0
T53
K4Y60T53BCD
Y76
Y76
Outputs current
value of timer
Timer starts when
X2 is turned on
K6000
T53K500=
Y77T53K120>
Turns on when
current value is
12sec. or less
Turns on when
current value is
50sec. or more
X2
0
T4
K4Y60T4BCD
Y70
Outputs current
value of timer
Timer starts when
X2 is turned on
K3000
T4K300>
Y72T4K319<
Turns on when current
value is 34sec. or more
Turns on when current
value is 30sec. or less
Y71T4K299<
T4K340>
T4K320>
Y73T4K339<
Y75T4K800<=
Y74T4K600<=
Turns on when current
value is 60sec. or more
Turns on when current
value is 80sec. or more
Turns on when current
value is from 30 to 31.9sec.
Turns on when current
value is from 32 to 33.9sec.