Kobold ZLS-2 - 6.3.2. Outputs control

User manual - DATA RECORDER and cooperating software
6.3.2. Outputs control
Device outputs are controlled by logic function of channels alarms. There are two logic
functions: OR – closes (or opens, if output channel mode is set to N.C.) the relay when
any
of
attached channels is in alarm state, AND - closes (or opens, if output channel mode is set to
“
N.C.
”) when
all
of attached channels are in alarm state.
A particular channel is in alarm state when condition selected in ”
Outputs settings:
Source
” is met. For example when ”
alarm 2
” option is selected for channel 1 the channel 1 will
be in alarm state
if and only if
alarm 2 will be present, state of alarm 1 does not mater in this
case. If option „
alarm 1 and 2
” is selected, channel will be in alarm state
if and only if
alarm 1
and
alarm 2 will be present in the same time.
”
Mode
” parameter describes output mode. If ”
N.O.
” is selected then relay will be closed
when logic function is
1
, and open in the other case. If ”
N.C.
” is selected then relay will be
open when logic function is
1
and closed in the other case.
Fig. 6.29
shows example reading fallowed by rely state. Rely state can be changed only
when times (t
A
,t
B
,t
C
,t
D
) are greater than delays times. If those delays times are set to ”
0
” the
switch state is taken as soon as condition appears. If those delay parameters are set to value
greater than ”
0
” relay switch state is taken (point B
ON
, D
ON
, chart: a, d, e) when delay time is
elapsed.
Caption:
A, B, C, D, E –
signal border crossing points.
B
ON
,
B
OFF
,
C
ON
,
C
OFF
,
E
ON
,
E
OFF –
relay switch state moments for chart d and e
t
A
,
t
B
,
t
C
,
t
D
,
t
E –
times when displayed values are in measurement zones Over and Under threshold
Fig. 6.29. Relay controlled by one alarm ”Over threshold” mode
(”Closed hold time and ”Open hold time” set to 0).
38
”Threshold”
parameter
”Hysteresis”
parameter
Signal
Reading
time
A
B
C
D
Output state
mode = N.O.
Close delay=0
Open delay=0
t
A
t
B
t
C
t
D
B
ON
D
OFF
Open delay
Close delay
B
OFF
D
ON
a)
b)
c)
d)
e)
Over
threshold
closed
open
Under
threshold
Logic
function
Close delay
Open delay
time
time
time
Output state
mode = N.C.
Close delay=0
Open delay=0
Output state
mode = N.O.
Close delay>0
Open delay>0
Output state
mode = N.C.
Close delay>0
Open delay>0
closed
closed
closed
open
open
open
time