User manual - METER SRT-73
SEtP
- first threshold of the relay (range -999 ÷ 9999). Negative values can be input by
selecting a - sign on first digit (to change value use
[^]
and
[v]
buttons).
Threshold is the medium value of relay hysteresis.
SEt2
- second threshold of the relay (range -999 ÷ 9999). Negative values can be input
by selecting a - sign on first digit ( to change value use
[^]
and
[v]
buttons). This
threshold is accessible when
modE
parameter is set to
in
or
out
value.
Threshold is the medium value of relay hysteresis.
HYSt
- hysteresis of relay (range 0 ÷ 999). Full hysteresis of the relay is equal to 2x
HYSt
parameter. The relay state can change when an input signal is out of
threshold-hysteresis
to
thhysteresis
zone.
Presented parameters should be set to ensure that
SEtP + HYSt ,
SEt2 + HYSt , SEtP - HYSt
or
SEt2 - HYSt
do not exceeds the
measure range. Additionally, in two threshold mode (
modE
=
in
or
out
), the
hysteresis for both thresholds must not cover each other (in other case relay can't
change his state).
modE
- relay operation mode:
noAC
- the relay is not active (permanent turned off)
on
- one threshold mode, the relay is turned
ON
when input signal exceeds
SEtP
+
HYSt
value
,
and is turned off back when the input signal became
lower than
SEtP HYSt
,
oFF
- one threshold mode, the relay is turned
OFF
when input signal exceeds
SEtP
+
HYSt
value
,
and is turned on back when the input signal became
lower than
SEtP HYSt
,
in
- two threshold mode, the relay is turned
ON
when the input signal is
bigger than
lower threshold
+
HYSt
and lower than
bigger
threshold
HYSt
, and turned off when the input signal is contained in
the second zone. The
bigger threshold
means bigger one of
SEtP
and
SEt2
thresholds, the
lower threshold
means lower one of
SEtP
and
SEt2
thresholds.
out
- two threshold mode, relay is turned
ON
when the input value is bigger
than
bigger threshold
+
HYSt
and lower than
lower threshold
HYSt
, and turned on when the input signal is contained in the second
zone. The
bigger threshold
means bigger one of
SEtP
and
SEt2
thresholds, the
lower threshold
means lower one of
SEtP
and
SEt2
thresholds.
modb
- the relay is controlled via RS-485 interface, independently on the input
signal.
LEDs light when relays are closed
, independently of relays' mode.
When power supply fail, unit do not store relays state selected by RS-485
interface.
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Summary of Contents for SRT-73
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