User manual - METER PDU-4x0-W
“toFF”
- turn off delay time, the relay is turned off with delay equal
“toFF”
if
the input value
exceeds appropriate
border value
(defined with
threshold
and
hysteresis
), at
least
“toFF”
time.
“toFF”
range 0 ÷ 99.9, defined with 0.1 sec. resolution. Unit of
this parameter is set by
“unit”
parameter.
If time when the input signal exceeds some border value is shorter than
“t on”
or
“toFF”
time, the relay do not change its state
(see paragraph:
CONTROL OF
THE RELAY OUTPUTS
).
“unit”
- unit of time for
“t on”
i
“toFF”
parameters. Can be set on one of two values:
“min”
- minutes,
“SEC”
- seconds.
“AL”
- this parameter defines the relay reaction when some critical situations occurs:
“noCH”
- relay do not change his state,
“on”
- relay will be turned on,
“oFF”
- relay will be turned off.
If parameter
“modE”
is set to
“on”
,
“oFF”
,
“in”
or
“Out”
the “critical situation”
means that allowable measurement range is exceeded.
If parameter
“modE”
is set to
“modb”
, the “critical situation” means
communication delay (when no data is received) longer than
“mbtO”
parameter
(see description:
“rS” menu
).
•
If option “
noCH
” is selected for
“AL”
parameter, behaviour of the relay may
depend on
“
FiLt
” parameter
in some cases
. If “
FiLt
” is set to big value and the
input signal drops, result value of the measure will change slow, causes of
turning on or off relay due to thresholds values. The critical situation is slowly
detected, so it is impossible to predict the relay state in that situations.
•
If parameter „
AL
” = „
on
”, the relay will be turned on in the critical situations,
even if his parameter
“modE”
=
”noAC”.
7.3.2.
“inPt” menu
This menu presets the measurement input:
“
tYPE
"
- type of the input / sensor. This parameter can be set to values:
”
0-20
”,
“
4-20
”
- current inputs.
”
0-10
”,
“
2-10
”, ”
0-5
”,
“
1-5
”
- voltage inputs.
Displayed values are defined by parameters
“Lo C”
,
”Hi C”
(or by user defined
characteristic points) and parameter
”Pnt”
.
”CHAr”
- this option presets type of the conversion characteristic, and can be set to:
”Lin”
- linear
“Sqr”
- square
“Sqrt”
- square root
When one of those characteristics is chosen display
range is defined by
“Lo C”
and
“Hi C”
.
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