User manual - METER PDU-4x0-W
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”
does not exceed 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.
“t on”
- turn on delay time, the relay is turned on with delay equal
“t on”
if
the input value
exceeds appropriate
border value
(defined with
threshold
and
hysteresis
), at
least
“t on”
time.
“t on”
range 0 ÷ 99.9, defined with 0.1 sec. resolution. Unit of
this parameter is set by
“unit”
parameter.
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