Pixsys DRR460 Series, User Manual, Page: 14 / 72

14 - DRR460 - User manual
The parameter
co.c.t.
has the same meaning as the heating time cycle
t.c.
Par. 41
coo.F.
(Cooling Fluid – word 2041) pre-selects the proportional band multiplier
p.b.m.
and the
cooling PID cycle time
co.c.t.
basing on the type of cooling fluid:
coo.f.
Cooling fluid type
p.b.m. co.c.t.
Air
Air 1.00 10
oiL
Oil 1.25 4
H2o
Water 2.50 2
Once selected the parameter
coo.f.
, parameters
p.b.m.
,
ou.d.b
and
co.c.t.
can however be modified.
7.10 Soft-Start function
DRR460 is provided with two types of softstart selectables on parameter 80
SS.tY.
( “Softstart Type” word
2080).
1 First selection (value 1 of word 2080) enables gradient softstart. At starting the controller reaches
setpoint basing on the rising gradient set on parameter 81
SS.Gr.
( “Softstart Gradient” word 2081) in
Unit/hour (ex. °C/h). If parameter 84
SS.ti.
( “Softstart Time” word 2084) is different to 0, at starting
when the time selected on parameter 84 is elapsed, the controller stops to follow the gradient and
reaches setpoint with the maximum power.
2 Second selection (value 2 of word 2080) enables output percentual softstart. On par 83
SS.tH.
( “Softstart Threshold” word 2083) it is possible to set the threshold under which starts the softstart.
On parameter 82
SS.PE.
( “Softstart Percentage” word 2082) an output percentage is selectable (0 to
100), which controller keeps until the process exceeds the threshold set on parameter 83 or until
the time in minutes set on parameter 84
SS.ti.
( “Softstart Time” word 2084) expires.
7.11 Retransmission function on analogue output
If not used as command, the anaolgue output can be used to retransmit process/ setpoint/ current
read by the C.T. input/ output percentage.
Select on parameter 100
rEtr.
( “Retransmission” word 2100) the value to be retransmitted. Select on
parameter 101
rE.tY.
( “Retransmission Type” word 2101) the type of output. It is possible also to select on
parameters 102 and 103 the input value rescale limites.
7.12 LATCH ON Function
For use with input
pot.1
(potentiometer 6 KΩ) and
pot.2
(potentiometer 150 KΩ) and with linear input
(0..10 V, 0..60 mV, 0/4..20 mA), it is possible to associate start value of the scale (parameter 3
Lo.L.i.
“Lower Linear Input“ word 2003) to the minimum position of the sensor and value of the scale end
(parameter 4
uP.L.i.
“Upper Linear Input“ word 2004) to the maximum position of the sensor (parameter
1 sul parametro 9
Ltch
”Latch On” word 2009).
It is also possible to fix the point in which the controller will display 0 (however keeping the scale range
between
Lo.L.i.
e
uP.L.i.
) using the “virtual zero” option by setting 2 or 3 in parameter 9
Ltch.
Setting 2 virtual zero can be modified in each moment while setting 1, Latch-On function ends after
120 seconds.
Then refer to the following table for the calibration procedure:
Press Display Do
1 1300
Write 1 to enable Latch on. Write 0 to end
procedure
Place the sensor on minimum operating
value (corresponding to
Lo.L.i
)
2 1301 Write 1 to fix value on minimum
Place sensor on maximum operating value
(corresponding to
uP.L.i.
)
3 1302 Write 1 to fix value on maximum
To exit standard procedure write 0 on 1300
or wait 120 seconds.
With “virtual zero” put the sensor on zero
point.
4 1303
Write 1 to fix zero virtual value.Write 2 to
reset zero virtual value.
To exit procedure write 0 on word 1300.