ascon KX6, Инструкция по эксплуатации

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Ascon Tecnologic - KX6 - ENGINEERING MANUAL -
PAG. 13
PV
SP
time
2
1
3
Available:
When [39] cont = PID or 3Pt.
Range:
0... 2.00.
Note:
Fast auto-tune calculates the Fuoc parameter while
the oscillating one sets it equal to 0.5.
[47] tcH - Cycle time of the heating output
Available: When at least one output is programmed in order
to be the heating output (H.rEG),
[56] cont = PID.
Range: 1.0... 130.0 seconds.
[48] rcG - Power ratio between heating and
cooling action (relative cooling gain)
The instrument uses the same PID parameter set for heat
and for cool action but the efficiency of the two actions are
usually different.
This parameter allows to define the ratio between the efficiency
of the heating system and the efficiency of the cooling one.
An example will help us to explain you the philosophy.
Consider one loop of a plastic extruder. The working
temperature is equal to 250°C.
When you want to increase the temperature from 250
to 270°C (
D
T = 20°C) using 100% of the heating power
(resistor), you will need 60 seconds.
On the contrary, when you want to decrease the temperature
from 250 to 230°C (
D
T = 20°C) using 100% of the cooling
power (fan), you will need 20 seconds only.
In our example the ratio is equal to 60/20 = 3 ([67] rcG = 3)
and it say that the efficiency of the cooling system is 3 time
more efficient of the heating one.
Available: When two control action are programmed
(H.rEG and c.rEG) and [39] cont = PID.
Range:
0.01... 99.99
Note:
Auto-tune functions calculate this value.
[49] tcc - Cycle time of the cooling output
Available: When at least one output is programmed in order
to be the cooling output (c.rEG), [56] cont = PID.
Range:
1.0... 130.0 seconds.
[50] rS - Manual reset (integral pre-load)
It allows to drastically reduce the undershoot due to a
hot restart. When your process is steady, the instrument
operates with a steady power output (e.g.: 30%).
If a short power down occurs, the process restarts with a
process variable close to the set point while the instrument
starts with an integral action equal to zero.
Setting a manual reset equal to the average power output (in our
example 30%) the instrument will start with a power output equal
to the value it will use at steady state (instead of zero) and the
undershoot will become very little (in theory equal to zero).
Available:
When [39] cont =
PID
or
3Pt
.
Range:
-100.0... +100.0%.
[51] Str.t - Servomotor stroke time
Available:
When [39] cont =
3Pt
.
Range:
5... 300 seconds;
Note:
When a open loop
with
potentiometer input is selected,
this parameter ia automatically calculated by the “auto-
matic calibration system” (see [48] P.cAL parameter).
[52] db.S - Servomotor dead band
Available: When [39] cont =
3Pt
.
Range: 0... 100%.
[53] OP.L - Minimum power output
Available:
When: [39] cont =
PID
;
[39] cont =
3Pt
and [58] Pot =
Pot.o
;
[39] cont = 3Pt and [58] Pot =
Pot.c
.
Range: -100... [54]OP.H%.
[54] OP.H - Maximum power output
Available:
When: [39] cont =
PID
;
[39] cont =
3Pt
and [58] Pot =
Pot.o
;
[39] cont = 3Pt and [58] Pot =
Pot.c
.
Range:
[53] OP.L ... 100%.
[55] St.P - Maximum power output used during
soft start
Available:
When: [39] cont =
PID
;
[39] cont = 3Pt and [58] Pot =
Pot.c
.
Range:
-100... +100%.
Notes: 1.
When St.P parameter have a positive value, the
limit will be applied to the heating output(s) only.
2.
When St.P parameter have a negative value, the
limit will be applied to the cooling output(s) only.
3. When a program with automatic start at power
up and soft start function are programmed, the
instrument performs the soft start and than the
program function.
4. The auto-tune function will be performed after soft
start function.
5. The Soft start function is available also when ON/
OFF control is used.
[56] SSt - Soft start time
Available: When: [39] cont =
PID
;
[39] cont =
3Pt
and [58] Pot =
Pot.c
.
Range: oFF Function not used;
0.01... 7.59 hh.mm;
inF
Soft start always active.
[57] SS.tH - Threshold for soft start disabling
Available:
When: [39] cont =
PID
;
[39] cont =
3Pt
and [58] Pot =
Pot.c
.
Range: -1999... 9999 engineering units.
Notes: 1. When the power limiter has a positive value (the
limit is applied to the heating action) the soft start
function will be aborted when the measured value
is greater or equal to SS.tH parameter.
2. When the power limiter has a negative value (the
limit is applied to the cooling action) the soft start
function will be aborted when the measured value
is lower or equal to SS.tH parameter.
[58] Pot - Potentiometer enabling
Available: When [39] cont =
3Pt
.
Range: nonE Potentiometer not used;
Pot.o Potentiometer used for indication only;
Pot.c
Potentiometer used for feedback.