Pid Parameter Setting - Honeywell DCP551 Mark ΙΙ User Manual

Chapter 7. PARAMETER SETUP

PID parameter setting

No.
Item code
P-1
Proportional band (PID group 1)
1
I-1
2 Integral time (PID group 1)
d-1
3 Derivative time (PID group 1)
rE -1
4 Manual reset (PID group 1)
oL-1
5 Manipulated variable lower limit (Output limiter group 1)
oH-1
6 Manipulated variable upper limit (Output limiter group 1)
P-2
7 Proportional band (PID group 2)
I-2
8 Integral time (PID group 2)
d-2
9 Derivative time (PID group 2)
rE-2
10 Manual reset (PID group 2)
oL-2
11 Manipulated variable lower limit
(Output limiter group 2)
oH-2
12 Manipulated variable upper limit
(Output limiter group 2)
P-3
13 Proportional band (PID group 3)
I-3
14 Integral time (PID group 3)
d-3
15 Derivative time (PID group 3)
rE-3
16 Manual reset (PID group 3)
oL-3
17 Manipulated variable lower limit
(Output limiter group 3)
oH-3
18 Manipulated variable upper limit
(Output limiter group 3)
P-4
19 Proportional band (PID group 4)
I-4
20 Integral time (PID group 4)
d-4
21 Derivative time (PID group 4)
rE-4
22 Manual reset (PID group 4)
oL-4
23 Manipulated variable lower limit (Output limiter group 4)
oH-4
24 Manipulated variable upper limit (Output limiter group 4)
P-5
25 Proportional band (PID group 5)
I-5
26 Integral time (PID group 5)
d-5
27 Derivative time (PID group 5)
rE-5
28 Manual reset (PID group 5)
oL-5
29 Manipulated variable lower limit (Output limiter group 5)
oH-5
30 Manipulated variable upper limit (Output limiter group 5)
P-6
31 Proportional band (PID group 6)
I-6
32 Integral time (PID group 6)
d-6
33 Derivative time (PID group 6)
7-18
Factory default
Item
settings
100.0
0
0
50.0
0.0
100.0
100.0
0
0
50.0
0.0
100.0
100.0
0
0
50.0
0.0
100.0
100.0
0
0
50.0
0.0
100.0
100.0
0
0
50.0
0.0
100.0
100.0
0
0
User
Settings and descriptions
settings
P
: 0.0 to 1000.0%
ON-OFF control when set to 0.0
l
: 0 to 3600sec
No integral operation when set to 0
d
: 0 to 1200sec
No derivative operation when set to 0
rE
: 0.0 to 100.0%
oL
: Ð5.0 to manipulated variable upper limit %
oH
: Manipulated variable lower limit to +105.0%
CP
: Ð19999 to +20000 SPU
tP
: Ð19999 to +20000 SPU
[Description:]
P
¥ When is set to 0.0, ON-OFF control is on and
settings display Ò-----Ó and setting cannot be performed.
¥ When the I setting is not equal to 0, Ò-----Ó is displayed for
and setting cannot be performed.
P
¥ Although a low setting improves control, overshoot and
hunting is more likely to occur.
l
¥ Although a low setting improves tracking, cycling caused
by integral operation occurs more often.
d
¥ Although a low setting makes it easier to suppress
overshoot, hunting is more likely to occur due to reactions to
minute PV action.
In normal temperature control, derivative time should be
between 1/3 to 1/4 of the integral time.
Since derivative operation is a cause of hunting in pressure
and flow control, set
set a low value.
rE
¥ The setting is used to eliminate offset caused by
proportional action (no integral action) and sets a suitable
deviation of 0.
oL oH
¥ The and settings also operate as integral limiters.
oL oH
When or manipulated variable reaches the upper or
lower limit, they turn off integral action and prevents reset
windup that occurs when PV has not risen for a long time.
CP
¥ The setting is the point where switching occurs between
PID groups A1 to A7.
tP
¥ is the tuning point where
A1 to A7 are automatically tuned starting from A1.
l d
, and
d
to 0.0 to turn off derivative action or
P I D
, and settings in groups
rE
rE