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(3) Long-time timer
0
Long-time timer by series
use of timers
e 7
Yc
3
143
146
I
I
r-
900
sec x
4
=
3600
sec = 1
h
142 K9990(999
sec)
144
1 4 5
K2010(201
sec)
147
XI0
Tg
contact a
Tlocontact a
YCI
Fig. 5-12. Long-time timer
@Long-time timer with use of timer and counter
4
153
M56
152
150
159
155
K 4
161
160
- 1
c
(3 'I
164
K 4
163
1 )
162
T
ourr
I
165
4
M56
XlZ
1
L
T
14
coil
T ~ c o n t a c t
a
n
-
(M56)
l-----l
-48-
7 - i
1
by series use of timers
so that
the required time limit is ob-
tained.
Step
NO.
I
;
Instructionl
Device
NO.
The number of time-ups of
the timer TI4 is counted by
the counter C7 to obtain a
long time.
After time-up, M56 resets
"14.
At the time of count-up, C7
executes self-holding for the
output YC3, YC3 resets T14,
and then the time limit
operation is stopped.
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