User manual - METER SWE-73-L
6.3.2.
Two thresholds mode
Description:
A, B, C, D, E
- points where measured signal exceeds border values (expected value ± allowed deviation)
t
A
,
t
B
,
t
C
,
t
D
,
t
E
-
time periods while input signal is in zone A or zone B
Figure 6.6. Principle of LED/relay output operation for two thresholds mode
Figure 6.6 presents the principle of relay outputs operation for two thresholds mode, and
an example values of other parameters. In this mode parameter
“SEt2”
is accessible in
common with
“SEtP”
, this parameter describes a second threshold of the relay output. The
parameters
“HYSt”
,
“modE”
and
“AL”
are connected with both
“SEtP”
and
“SEt2”
thresholds. While the controlling process, the relay output changes his state depends of both
“SEtP”
and
“SEt2”
thresholds in similar way as it was described in one threshold mode.
If two threshold mode is used,
“modE”
parameter defines state of the relay output when
the input value occurs in a particular zone defined by
border values
of both
thresholds
. The
relay can be turned on if the input value enters the
zone A
(
“modE”
=
“in”
) or
zone B
(
“modE”
=
“out”
) and turned off if it enters the second one
(figure 6.6).
The sequence of thresholds
“SEtP”
and
“SEt2”
can be
set in any order, due to the
control of relay outputs is done depend on difference between thresholds values
(
zone A
) and outside of threshold values (
zone B
).
7.
DEVICE PROGRAMMING
The device menu allow user to set all parameters connected to operation of
measurement input, control modes, critical situations behaviour and access settings. The
meaning of the particular parameters is described in paragraph
MENU DESCRIPTION
.
16
i
E
OFF
“SEtP”
or
“SEt2”
parameter
“HYSt”
parameter
measure
d signal
displayed value
time
time
A
B
C
D
relay state
(
modE
=
in
)
t
A
t
C
t
D
B
ON
relay state
(
modE
=
out
)
B
OFF
E
ON
time
closed
open
a)
b)
c)
open
closed
zone A
zone B
“HYSt”
parameter
zone B
C
OFF
C
ON
E
t
B
t
E
