Pixsys ATR244, Быстрый старт, Страница: 18 / 148

18 - ATR244 - User manual
3
ACTIVE
ACTIVE
SPV
PV

x

= COOL

x

= COOL

x

=
COOL

< 0

=
0

> 0

( HEAT )

( HEAT )

(
HEAT
)
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT (
COOL
)
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT ( COOL )
COMMAND OUTPUT ( HEAT )
ALARM OUTPUT ( COOL )
SPV
PV
ACTIVE
ACTIVE
SPV
PV
ACTIVE
ACTIVE
Parameter
c.c.T.1
has the same meaning of cycle time for heating action
c.t. 1.
Parameter
co.f.1
(Cooling Fluid) pre-selects the proportional band multiplier
p.b.m.1
and the cooling PID
cycle time
c.c.T.1
according to cooling fl uid type:
co.f.1
Cooling fl uid type
p.b.m.1 c.c.t.1
Air
Air 1.00 10
oiL
Oil 1.25 4
H2o
Water 2.50 2
Once parameter
co.f.1
has been selected, the parameters
p.b.m.1
,
o.d.b.1
and
c.c.T.1
can be however
modifi ed.
8.10 LATCH ON Function
For use with input
pot.
and with linear input (0..10 V, 0..40 mV, 0/4..20 mA) t is possible to associate start
value of the scale (par. 4
L.L.i.1
or par. 21
L.L.i.2
) to the minimum position of the sensor and value of the
scale end (par. 5
u.L.i.1
or par. 22
u.L.i.2
) to the maximum position of the sensor (par. 10
Ltc.1
or par. 27
Ltc.2
confi gured as
stndr
).
It is also possible to fi x the point in which the controller will display 0 (however
keeping the scale range between
L.L.i.1
/
L.L.i.2
and
u.L.i. 1
/
u.L.i.2
) using the
“virtual zero”
option by
selectin
u.0.sto.
or
u.0.t.on.
on par. 10
Ltc.1
or 27
Ltc.2.
Selecting
u.0.t.on.
the virtual zero must be reset at
each switching on; selecting
u.0.sto.
the virtual zero will remain fi xed once calibrated. To use the LATCH
ON function, confi gure the par.
Ltc.1
or27
Ltc.2.
1
Then refer to the following table for the calibration procedure:
Press Display Do
1 FNC
Exit parameters confi guration. Display 2
visualizes writing
Latc.
Place the sensor on minimum operating
value (corresponding to
L.L.i.1
/
L.L.i.2
)
2

Store value on minimum.
Display shows
Low.
Place sensor on maximum operating value
(corresponding to
u.L.i.1
/
u.L.i.2
).
3

Store value on max.
Display shows
HiGh.
To exit standard proceeding press SET .
For “virtual zero” setting, place the sensor to
zero point.
4 FNC
Set virtual zero. Display shows
zero.
If “Virtual zero at start” is selected, point 4
must be repeated at each starting.
To exit procedure press SET .
1
The tuning procedure starts by exiting the confi guration after changing the parameter.