User manual - CONTROLLER PUR-94D
Threshold is the medium value of relay hysteresis.
“HYSt”
- hysteresis of relay (range 0 ÷ 999). Full hysteresis of the relay is equal to 2 times
“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).
•
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.
“OFFS”
- this parameter specifies the difference between the setpoint value to the controller
and the signal measured by the device, which will cause an output response to that
signal,
“SEnS”
- this parameter specifies what percentage of the controller’s output status must be
achieved in order for the output to react to the status of the controller.
In a situation where the parameters
”OFFS”
and
”SEnS”
are other than zero, the
controller only responds to the signal when the conditions described for both of
these parameters are met simultaneously.
“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.
“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:
).
“unit”
- unit of time for
“t on”
and
“toFF”
parameters. Can be set on one of two values:
“min”
- minutes,
“SEC”
- seconds.
The above-mentioned parameters do not occur when the “
modE"
parameter is
set to
"PULS"
. In such a configuration the user has at his disposal the
parameters:
"InLo", "INHi", "Peri", "H on"
and
"HoFF"
.
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