User manual - COUNTER SLN-94
6.
PRINCIPLE OF OPERATION
After turning the power supply on, device ID and software version are showed on the
display, next the data
stored while power supply off
are restored and device goes to the
selected operation mode.
6.1.
MEASUREMENT MODE
During normal operation the counter counts pulses from input {
A
}, calculates using
„
div
” and „
muL
” parameters, and shows the result on right LED display (red) with selected
decimal point position (parameter „
Pnt
”). Displayed values are contained in 3 decades (000 ÷
999). While its value exceeds 3 decades, its value turns on itself (it counts like this: 998, 999,
000, 001 or 001, 000, 999, 998 – depends on counting direction). Left LED display (green) is
called adjuster, and shows current value of parameter ”
Pr1
”.
counter can be programmed to any value form range 1 ÷ 1000. Value 1000 can
be obtained setting 000. In such case driving of relays is realised after counting of 1000 units
(it can be more pulses depend on
„div”
). To change particular position of programmed value
use [
^
] buttons. To simplify entering of the thresholds decimal point on both displays is showed
on the same positions.
Device counts pulses UP as well as DOWN. The selection of counting direction is realised
using programming menu.
The initialisation of counting cycle (e.g. batching) can be made in several ways:
•
pushing
[ESC/RESET]
button, and apply by
[ENTER]
button,
•
delivering and next removing of
active
state to external
clear/start
input {
D
}
,
•
direct storing of internal registers via RS-485 interface.
When initialization of counting cycle occurs, following operations are realised by internal
software: clearing of counter register (while counting UP) or loading of counter register with
value equal to adjuster value showed on left (green) LED display. Next the device starts
counting in selected direction, and LED marked „
F
” lights until end of counting cycle.
Together with initialization of counting cycle new relays controlling cycle starts. (see
chapter:
CONTROL OF THE RELAY OUTPUTS...
).
Depending on parameter ”
Ar
” (see description:
”Ar” parameter
) counting and controlling
cycles are realised once or sequentially, allowing automatic controlling of process without user
interaction. Counting cycle ends (LED „
F
” dims) after counter reach stored threshold. For
counting UP this is value stored while initialisation of the cycle, for counting DOWN it is zero.
Delivering of active state to control inputs „hold” (marked {
B
}) causes holding of
counting.
Active state on input {
B
} causes holding of counting, but has no influence to
realisation of counting and relays controlling cycles.
Delivering of active state to
stop
input marked {
C
} causes termination of counting
relays controlling cycles. Relays are driven to its
inactive
state (see description of parameters
”
mr1
”and ”
mr2
” of
”rL1”
,
”rL2” menu
).
15
i
Summary of Contents for SLN-94
Page 41: ...User manual COUNTER SLN 94 41...
Page 42: ...User manual COUNTER SLN 94 42...
Page 43: ...User manual COUNTER SLN 94 43...
