User manual for - FLOW METER SPI-N118
6.3.
CONTROL OF THE RELAY OUTPUTS
The control of the object (measured signal) is done due to instantaneous flow value
(current flow rate), total flow counter value or batcher counter value
, and
is realized via relay
outputs. Front panel LEDs named „
R
” indicates the state of particular relay output.
If device is not equipped with one or more relay outputs, menus refer to this relays
are available, but apply to LED indicators only. In such case LEDs indicates
exceeding of particular thresholds.
Modes of the control can be changed depend on the values of parameters
“SourCE”
,
“SEt P”
,
“SEt P2”
,
“HYSt ”
,
“modE”
,
“t on”
,
“t oFF”
,
“unit”
and
“ALArmS”
(available in
”
rELAy1
” ÷ ”
rELAy4
” menu). If relay is controlled due to total flow counter value
(
“SourCE”
=
”tot”
), additional parameters are available in menu. Parameters
“t PrEC”
and
“t unit”
define the unit and resolution of displayed thresholds and hysteresis of selected relay.
If relay is controlled due to batcher counter value (
“SourCE”
=
”bAt”
), in addition
“b PrEC”
and
“b unit”
parameters are available in menu but parameters:
“SEt P2”
,
“HYSt”
,
“modE”,“t on”
,
“t oFF”
,
“unit”
are unavailable. Parameters
“b PrEC”
and
“b unit”
define
the unit and resolution of displayed thresholds and hysteresis of selected relay.
Depend on
“modE”
parameter, relays can be not used or controlled over one or two thresholds values.
If one threshold is used (Figure 6.3) the relay can be turned on (
“modE”
=
”on”
) or off
(
“modE”
=
”oFF”
) when the input signal value is contained in
zone A.
If two thresholds are
used (Figure 6.4) the relay will be turned on when value of input signal is contained in
zone A
(
“modE”
=
”in”
) or
zone B
(
“modE”
=
”out”
) and turned off if the signal is contained in the
second one.
Figure 6.3. One threshold control of the relay/LED outputs
Figure 6.4. Two threshold control of the relay/LED outputs
17
zone B
zone A
zone B
measure
”SEt P” or ”SEt P2” parameter
”HYSt” parameter
state of
relay/LED
zone A
zone B
measure
”SEt P” parameter
”HYSt” parameter
state of
relay/LED
i
