User manual - FLOW METER SPI-73
6.3.
CONTROL OF THE RELAY OUTPUTS
The control of the object (measured signal) is done due to instantaneous flow value
(current flow rate) or total flow 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
“vALUE”
,
“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
(
“vALUE”
=
”tot”
), additional parameters are available in menu. Parameters
“t PrEC”
and
“t unit”
defining the resolution and unit 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
18
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
Summary of Contents for SPI-73
Page 46: ...User manual FLOW METER SPI 73 46...
