Set Up Control Page - ABB COMMANDER 1900 Series Programming Manual

4.3.4 Set Up Control Page (control actions and limits – heat/cool)
Information.
• Independently programmable control actions for heat and cool outputs – direct or reverse.
• Output limits for heat and cool outputs.
ACtION
h dIr
rEV
Ht-HI
----
ACtION
C dIr
rEV
CL- xx
------
dFA-PV
------
100%
Low O/P
Limit (Cool)
0%
P.I.D. Output
0%
Heat Output Action – Direct or Reverse
Cool Output Action – Reverse
Control Action (Heat)
Select the action for the heat and P.I.D. control outputs:
h dir – direct acting
rEV – reverse acting.
100
Output decreases
as process variable
increases
%
Output
0
Eng. Range
Reverse Acting
Heat Output High Limit:
limits the high level of the heat control output value when in automatic mode. If the control output
is above this limit when automatic mode is selected, the output is allowed to stay at its current
level but is not allowed to go any higher. Once the control output returns to, or below, this limit the
limit then applies. When the controller is in manual mode the output limits do not apply. Select the
heat output high limit value required, between 0.0 and 100.0 in 0.1 increments.
Control Action (Cool)
Select the action for the cool control output (see also
C dir – direct acting
rEV – reverse acting.
Cool Output High/Low Limit:
limits the high or low level of the cool control output when in automatic mode, depending on the
Control Action (Cool) setting (
exceeds this limit when automatic mode is selected, the output remains at its current level but is
not allowed to go any further away from the limit. Once the control output returns to, or within, this
limit, the limit then applies. When the controller is in manual mode the output limits do not apply.
Select the cool output high (low) limit required, between 0.0 and 100.0 in 0.1 increments.
Continued on next page.
High O/P
Limit (Heat)
100%
Fig. 4.9 Heat/Cool Control Actions
4 CONTROL CONFIGURATION LEVEL...
Output
PV
Control Action (Heat)
rEV. is the low and dIr is the high setting). If the control output
100%
High O/P
Limit (Cool)
0%
0%
Heat Output Action – Direct or Reverse
Cool Output Action – Direct
100
Output increases
%
as process variable
increases
0
Eng. Range
Direct Acting
, above):
High O/P
Limit (Heat)
P.I.D. Output
100%
PV
41