AUBER INSTRUMENTS
WWW.AUBERINS.COM
2021.05
P4/7
Table 4. Control parameters.
Symbol
Description
Setting Range
Initial
Note
bb
bb
Proportional Band
Range Limit
1 ~ 1999
300
10
SouF
SouF
Damp Constant
0.1 ~ 1.0
0.2
11
ot
ot
Control Cycle
1 ~ 500 (sec)
2
12
FILt
FILt
Digital Filter Strength
0 ~ 3
0
13
End
End
Exit
Note 10.
Proportional Band Range Limit (
bb
): This parameter sets a temperature
range in which the Proportional Constant (
P
) functions. If the absolute value of the
difference between
PV
and
SV
is greater than
bb
, the proportional output will
always be 100%. If a user wish to use parameter
bb
to fine tune the performance
of the controller, the value of
bb
should be smaller than the value of
P
. By default,
bb
is set to 300 degrees.
Note 11.
Damp Constant (
SouF
): This constant can help the PID controller further
improve its control quality. It uses the artificial intelligence to dampen the
temperature overshot. When
SouF
is set to a small value, the system may
overshoot; when
SouF
is set to a high value, the system will be over-damped.
SouF too low
SouF acceptable
SouF too high
Figure 4. Using damp constant to adjust the control results.
Note 12
. Control Cycle (
ot
): It is a time period setting (unit in seconds) that decide
how often does the controller calculates and changes its output. A smaller
ot
can
result in a better control precision. However, when using the relay output or control
an external relay/contactor, set
ot
to a small value will operate the relay frequently
and shorten the its life. When
Outy
is set to 1 or 2, set
ot
to 1 ~ 3 seconds; when
Outy
is set to 3, set ot to 20 ~ 40 seconds; when Outy is set to 4 or 5,
ot
setting is
ignored. Generally speaking, set
ot
to small value for a fast response system, set
ot to larger value for a slow response system.
Note 13
. Digital Filter (
Filt
):
Filt
= 0 (default), filter disabled;
Filt
= 1, weak filtering
effect;
Filt
= 3, strongest filtering effect. Stronger filtering increases the stability of
the readout display, but causes more delay in the response to changes in
temperature.
5.3 Set value setting and alarm setting (accessed by code 0001)
The set value and alarm parameters are listed in Table 5. To change the
parameters, press SET key
, enter code “0001”
, and press SET key again. The
procedures to change control parameters are similar to what is shown in Figure
3.
Table 5. Set temperature and alarm parameters.
Symbol
Description
Initial
Setting
Note
SV
SV
Target temperature
(Set Value)
800
12
AH1
AH1
J1 pull-in temperature
900
13
AL1
AL1
J1 drop-out temperature
800
13
END
END
Exit
Note 12.
There are two ways to set the target temperature:
a.
In the normal operation mode, press or V key to directly increase or
decrease the SV. Then wait about 4
seconds to allow the controller save the new
SV.
b.
Press SET key once, enter code 0001, the press SET key again to confirm.
Then the display will flash
SV
(
Su
) in the top display. Press the SET key again
to show the current SV setting in the bottom display. Now use >,
and V key to
enter the new SV and press the SET key to save the value. Press V key to put
END on the top display, then press SET key to exit; or you can wait about 30
seconds then the controller will return to normal operation mode.
Note 13.
Alarm setting (
AH1
and
AL1
). The J1 relay can be set to works as
absolute temperature alarm (when
outy
= 1 or 5), or as temperature deviation
alarm (when
outy
= 2).
1) Absolute alarm (outy = 1 or 5)
When J1 works as an absolute temperature alarm, the
AH1
is the alarm-on
temperature,
AL1
is the alarm-off temperature. When
AH1
>
AL1
, J1 works as an
absolute high temperature alarm: when PV is higher than AH1, J1 relay pulls in;
when PV is lower than AL1, J1 relay drops out. The diagram is shown in Figure 5
to illustrate how it works. When
AH1
<
AL1
, J1 works as an absolute low
temperature alarm. A diagram is shown in Figure 6 to illustrate how it works. When
AH1
=
AL1
, the alarm is disabled.
Relay on
Relay on
PV
PV
Figure 5. Absolute high alarm
Figure 6. Absolute low alarm
SV
AL1
AH1
AH1
AL1
SV
2) Deviation alarm (outy = 2)
When J1 is set as a deviation alarm, it will be activated if
PV
deviates too far
away from the set value (
SV
).
AH1
defines the deviation high alarm,
AL1
defines
the deviation low alarm. For the deviation high alarm, when
PV
is higher than (
SV
+
AH1
) relay J1 will pull in, when PV drops below (
SV
+
AH1
-
Hy
) relay J1 will
drop out; for the deviation low alarm, when PV is lower than (
SV
-
AL1
) relay J1
will pull in, when PV is higher than (
SV
-
AL1
+
Hy
) relay J1 will drop out. To
deactivated the deviation high alarm, set
AH1
= 0; to deactivated the deviation
low alarm, set
AL1
= 0.
Figure.7 J1 relay works as derivation alarms
(SV = 100, AH1 = 20, AL1 = 30, Hy = 10).
