4.5 - CNT EN INPUT OPERATING MODE
The start signal can be given by the frontal key T programmed as
START/STOP function (“t”=1 or 2), which normally has bistable
functioning, or by the CNT EN input count enable.
As regards the CNT EN input, which enables time counting, the
instrument can be programmed to operate in any of the following 4
modes:
E = 1 - BISTABLE START/STOP:
After resetting the timer using the RESET input, close the CNT EN
contact to start the timer. Now release the contact.
When the contact is closed again, the timer stops on the current
counting value.
The timer starts again following another impulse to the CNT EN
input port.
This procedure goes on until a RESET signal is transmitted or the
set time period has expired.
E = 2 - BISTABLE RESET-START/STOP:
This operating mode is very similar to that of the front START/STOP
key and dipends also from "t" parameter which has 2 possible
functioning modes:
E = 2 , t = 1 - RESET-START/STOP:
The first impulse on CNT EN input reset and start the timer, at the
second impulse, if it is given before the end of the time, the timer
stops (if the output was actived now will be disabled), otherwise, if it
is given after the end of the time, the second pulse actives a new
counting cycle.
E = 2, t = 2 - RESET/START/STOP:
At the first pulse on CNT EN input the timer is resetted, at the
second the counting starts, at the third pulse the counting is
stopping, and so on.
E = 3 - MONOSTABLE START/STOP:
After being reset by means of the RESET input, the timer starts
when the CNT EN contact is closed and stops when the contact is
opened.
At this point, if the contact is closed again, the timer will re-start from
the current value, and so on until a RESET signal is transmitted or
the set time period has expired.
In this functioning mode the T frontal key works only as reset.
E = 4 - MONOSTABLE RESET-START/STOP:
By closing the CNT EN input and keeping it closed, the timer is
resetted and starts the counting, at the opening of the CNT EN input
the counting is stopped.
This operating mode is recommended when the user wants to
control the timer using voltage signals. In fact, with an appropriate
interface (eg. an external relay) the timer is reset and starts counting
when voltage is supplied, and stops when voltage is cut off (just like
a conventional timer).
In this functioning mode the T frontal key works only as reset.
5 - PROGRAMMABLE PARAMETERS
5.1 - PARAMETERS TABLE
1
0 - 1 - 2 - 3
T key operating mode
t
10
1
1 - 2 - 3 - 4
CNT EN input
operating mode
E
9
1
1 - 2 - 3
Back-up mode
b
8
1
1 - 2
Counting mode
C
7
99_ _
00_ _ ... 99_ _
Maximum set time “t2”
H2
6
99_ _
00_ _ ... 99_ _
Maximum set time “t1”
H1
5
1
1 - 2 - 3 - 4
Time Range “t2”
S2
4
1
1 - 2 - 3 - 4
Time Range “t1”
S1
3
0
0 - 1 - 2 - 3 - 4
OUT 2 0perating
mode
F2
2
1
1 - 2 - 3 - 4 - 5
OUT 1 operating
mode
F1
1
Notes
Def.
Range
Description
Par.
5.2 – PARAMETERS DESCRIPTION
F 1
- OUT 1 OPERATING MODE: Permits the user to select the
operating mode of the output OUT 1 as regards counting.
The 5 mode are:
1 = Delayed
2 = Feedthrough
3 = Asymmetrical Oscillator Start Off
4 = Asymmetrical Oscillator Start On
5 = One cycle Asymmetrical Oscillator Start Off
F 2
- OUT 2 OPERATING MODE: Permits the user to select the
operating mode of the output OUT 2 as regards counting.
The 5 mode are:
0 = Ouput disable
1 = Operating like OUT1
2 = On during counting
3 = Same function of OUT1 with time t3 absolute
4 = Same function of OUT1 with time t3 dependent from time t1
S1
- TIME RANGE t1 (and t3) : This parameter allows the user to
select the full range of the time t1 (and t3 if activate) according to
the following options:
1 = hrs (9999)
2 = hrs - min. (99 hrs 59 min.)
3 = min. - sec. (99 min. 59 sec.)
4 = sec. - cents (99 sec. 99 cents) .
S2
-TIME RANGE t2: This parameter only involves the operating
modes "F1"= 3 and 4, and is used to select the full range of the t2
time period. The options are the same as for the "S1" parameter.
H1 -
HIGH SET POINT TIME t1 : This parameter allows the user to
program the 2 most significative figures of the Higher value
programmable as Set Point “t1”
H2 -
HIGH SET POINT TIME t2: Similar to “H1” but referred to the
set “t2”.
TECNOLOGIC spa - TT 73
- OPERATING INSTRUCTIONS - Vr. 01 - ISTR 06083 - PAG. 5
