Control Page (Standard Control) - ABB C1900 Series Operating Manual

...5 CONTROL OPERATION

5.9.1 Control Page (Standard Control)

CONtrL
PAGE
CYCt
300. 0
1. 0
Time Proportioning
Control
HYSt
0
PrOP
___. _
7200
INtGrL
OFF
Integral
On
Integral Off
MrESEt
___. _
ContrL
PAGE
dErIV
OFF
Derivativ
e Off
APPb
_. _
30
Page Header – Control Page
Cycle Time (applicable only for control using relay output)
This setting can be ignored for analog control outputs.
1. 0
Set the required cycle time for time proportioning control, from 1.0 to 300.0 in 0.1
second increments (300 seconds = 5 minutes) – see Fig. 5.16 on page 27.
only
Hysteresis (applicable only for control using relay output)
This setting can be ignored for analogue control outputs.
The hysteresis is operational above or below (depending on the control action, direct
or reverse) the set point and is only applicable for ON/OFF control – see
Fig. 5.14 on page 26.
Set the hysteresis value required for on/off control in engineering units (between 0
and 10% of engineering range span).
Proportional Band
Set the proportional band value required, between 0.1 and 999.9% in 0.1%
increments.
OFF
Integral Action Time
1
Set the required time between 1 and 7200 in 1 second increments (7200 seconds =
OFF
120 minutes). '
Manual Reset
100. 0
Set the required proportional band offset on the lower display, between 0.0 and
0. 0
100.0% of the engineering range span in 0.1% increments.
999. 9
Derivative Action Time
0. 1
Set the required time between 0.1 and 999.9 in 0.1 second increments (999.9
OFF
seconds = 16.67 minutes). '
Approach Band
3. 0
Set the required value between 0.1 and 3.0 in 0.1 increments. (Set 1.0 initially).
0. 1
OFF
' is selected above 7200 or below 1.
OFF
' is selected below 0.1.