27
…7.3.1
Control Page (Heat/Cool Control)
Integral Action Time (Cool)
Set the required time between 1 and 7200 in 1 second
increments (0.1 and 120 minutes in 0.1 minute
increments).
OFF
is displayed in place of 7201 (120.1).
Manual Reset (Cool)
This is only operable with Integral Action Time (Cool) set to
OFF
. Set the required proportional band offset between
0.0 and 100.0% of the display span in 0.1% increments.
Derivative Action Time
Set the required time between 0.0 and 999.9 in 0.1 second
increments (0.1 and 16.67 minutes in 0.01 minute
increments). The same derivative action time is used for
both heating and cooling.
OFF
is displayed in place of zero.
Approach Band
Set the required value between 0.1 and 3.0 in 0.1
increments.
(Set 1.0 initially.)
Manual Reset Adjust Enable
Manual Reset
display and adjustment in the
Operating Page
(see Section 5.2.) can be enabled or disabled.
Select
YES
to enable or no to disable.
Crossover Output Value
Set the required crossover output value, between 0.0%
and 100.0% of P.I.D. output in 0.1% increments – see
Section 7.3.2.
Transition Bandwidth
Set the required value, between 0.0% and 100.0% of
P.I.D. output in 0.1% increments – see Section 7.3.3.
Output Off Hysteresis
The hysteresis is set to prevent oscillation of control
changes. Set the required value,
±
25.0% (of P.I.D. output)
from the crossover output value, in 0.1% increments.
Control Algorithm Offset
The offset is only applicable if
Integral Action Time
is set.
Set the required offset either 0.0 or 50.0%.
Continued on next page.
7
CONTROL LEVEL…
OFF
MrSEt c
50.0
Integral
Action
Time
Set
Int. Action
Time Off
OFF
50.0
APPb
1.0
YES
10.0
OFFHYS
5.0
OFFSEt
0.0
INtGrL c
dErIV
Mr–AdJ
CrSOVr
t–bANd
