Satchwell IAC 600 - Stage 1 Proportional Band; Stage 1 Integral Action Time; Stage 2 Proportional Band; Stage 2 Integral Action Time

CONTROL MODULES
(
Cont.
)
RPW Setting
(
review onl
y)
This parameter displa
y
s the remote set value from the RPW input to
the controller.
–10,000 to 10,000 –
Reset Setting
(
review onl
y)
This parameter displa
y
s the influence that the reset input is havin
g
on
the set value.
–10,000 to
+10,000/10 Volts
–
Reset Ratio
This settin
g
is used to determine the influence that an analo
g
ue input
connected to the reset input of the controller has over the main set
value. B
y
settin
g
the value as a positive number the set value will be
increased as the analo
g
ue input is increased. The opposite is true if it
is set to a ne
g
ative value.
–10,000 to
+10,000/10 Volts
10
Stage 1 Deadzone Occupied
The deadzone is the difference between the set value and the point at
which the sta
g
e starts to control. This parameter is used whilst the
controller is in occupied mode.
0 to 10,000 1
Stage 2 Deadzone Occupied
The deadzone is the difference between the set value and the point at
which the sta
g
e starts to control. This parameter is used whilst the
controller is in occupied mode.
0 to 10,000 1
Stage 1 Deadzone Relaxed
As for the occupied deadzone but onl
y
used whilst the controller is in
relaxed mode.
0 to 10,000 3
Stage 2 Deadzone Relaxed
As for the occupied deadzone but onl
y
used whilst the controller is in
relaxed mode.
0 to 10,000 3
Stage 1 Deadzone Night
As for the occupied deadzone but onl
y
used whilst the controller is in
ni
g
ht mode.
0 to 10,000 6
Stage 2 Deadzone Night
As for the occupied deadzone but onl
y
used whilst the controller is in
ni
g
ht mode.
0 to 10,000 6
Upper Deadzone
(
review onl
y)
This parameter displa
y
s the upper deadzone value that the IAC is
currentl
y
usin
g
.
–10,000 to 10,000 –
Lower Deadzone
(
review onl
y)
This parameter displa
y
s the lower deadzone value that the IAC is
currentl
y
usin
g
.
–10,000 to 10,000 –
Stage 1 Proportional Band
This settin
g
is the ran
g
e over which the Sta
g
e 1 output moves
proportionall
y
across its full stroke.
0 to 10,000 10
Stage 1 Integral Action Time
(
0 = Off
)
This parameter is the set time interval necessar
y
for inte
g
ral action
time to increase the Sta
g
e 1 output b
y
the current proportional level.
Set to 0 for purel
y
proportional control.
0 to 10,000
Seconds
300 Secs
Stage 1 Derivative Action Time
(
0 = Off
)
This is usuall
y
left at zero. It is used where a faster control action is
re
q
uired and reducin
g
the Proportional Band and/or Inte
g
ral time
causes huntin
g
. As a
g
uide, the derivative time must be set at less
than a tenth of the Inte
g
ral Time as a start point.
0 to 10,000
Seconds
0 Secs
Stage 1 Ramp Time
This determines the time in seconds for the output sta
g
e to chan
g
e
from full
y
closed to full
y
open
(g
iven a continuous demand
)
.
0 to 10,000
Seconds
60 Secs
Stage 2 Proportional Band
This settin
g
is the ran
g
e over which the Sta
g
e 2 output moves
proportionall
y
across its full stroke.
0 to 10,000 10
Stage 2 Integral Action Time
(
0 = Off
)
This parameter is the time interval necessar
y
for inte
g
ral action time to
increase the Sta
g
e 2 output b
y
the current proportional band. Set to 0
for purel
y
proportional control.
0 to 10,000
Seconds
300 Secs
Stage 2 Derivative Action Time
(
0 = Off
)
See Sta
g
e 1 Derivative Action Time
0 to 10,000
Seconds
0 Secs
Stage 2 Ramp Time
This determines the time in seconds for the output sta
g
e to chan
g
e
from full
y
closed to full
y
open
(g
iven a continuous demand
)
1 to 10,000
Seconds
60 Secs
Sample Time
(
0 = as fast as possible
)
This is the interval between successive readin
g
s of the measured
values at the connected sensors. A short interval of sa
y
10 seconds
permits rapid response but onl
y
a small amount of corrective action. It
is suited to s
y
stems havin
g
short time constants.
0 to 10,000
Seconds
10 Secs
A lon
g
er interval such as 20 seconds is slower to react but permits a
lar
g
er amount of corrective action. For this reason it is suited to
s
y
stems havin
g
medium len
g
th time constants.
If control action tends to be too slow reduce the settin
g
and if it tends
to hunt increase it. This fine tunin
g
should be done in small steps of
around 10 to 20%.
MODULES AND FUNCTIONS
Bubbleland
Symbol Module Range Default
05/98 7 - 24 DS 2.951A