Orion System GPC-XP Controller - Manual (Page 24)

Section 6: Confi guring Relays
GPC-XP Controller Technical Guide 24
Figure 38: Control Source Setpoints
Control Source Setpoints
Main Control Method Window
The “High Limit Setpoint” and the “Low Limit Setpoint” establish
the Control Window.
For example, if “On Above/Off Below” is selected as the Control
Method, then the relay will energize above the High Limit Setpoint
and will de-energize below the Low Limit Setpoint. In between is
a deadband.
If “On Above/On Below” is selected as the Control Method, then
the relay will energize above the High Limit Setpoint and below
the Low Limit Setpoint. In between these setpoints, the relay will
be de-energized.
The “ Night Setback Setpoint Spread” is the offset to the High and
Low Limit Setpoints used during the Unoccupied Mode. The Ques-
tion Mark feature is not used in this case.
If the Control Method for this Relay is Lead Relay for Lead/Lag
Control, then the Setpoint fi eld in Figure 39 below will appear:
Figure 39: Control Source Setpoints for Lead Relay
for Lead / Lag Control
If the Control Method for this Relay is one of the Above/Below
options, then the Control Source Setpoints need to be confi gured.
See Figure 38 below.
The “Increasing Proof Setpoint” would be used if the Control Source
input needs to rise to a certain level to establish Proof of Operation.
The “Decreasing Proof Setpoint” would be used if the Control
Source input needs to fall below a certain level to establish Proof of
Operation. Clicking on the Question Mark will show Help informa-
tion. Do not enter a value for both setpoints or the Increasing Proof
Method will take control. If the Lead/Lag Proof is a binary input,
these setpoints are not used. The Night Setback Setpoint Spread fi eld
is not available in this confi guration.
Figure 40: Slide Offset Channel
Slide Offset Channel Field
If you are using a WattMaster standard OE212 or OE213 Flush Mount
Wall Sensor which has the optional slide offset switch, and you want
that slide switch to adjust the Control Source Setpoints up or down,
be sure to select the analog input the slide offset was connected to
(Control Source fi eld, Figure 37, page 23). See Figure 40 below.
If you are using a Digital Communicating Temperature sensor
(OE217-00) and it is the Control Source, its slide offset will auto-
matically be used if Control Source Setpoints were entered. In this
case, you do not need to confi gure the Slide Offset Channel.
The slide offset effect will be refl ected on the Main GPC-XP Status
Screen in the Setpoints fi eld next to this relay (Figure 8, page 11).
The Hi Limit and Lo Limit Setpoints on this current screen will
always refl ect their confi gured values.
Figure 41: Reset Source
Reset Source/Reset Source Limits Field
You can select an input as the Reset Source (that is, any Source except
the Binary Inputs) that will cause your Control Source Setpoint to be
proportionally reset between the Lo Limit Setpoint and the Hi Limit
Setpoint as the Reset Source changes from its programmed Minimum
Limit to its Maximum Limit. The reset can be made reverse acting
by reversing the Min/Max reset limits so that the Min is the higher
value. See Figures 41 & 42.