Protege System Controller Reference Manual

Base Data Register
The Base data register is used as the first register in the list of registers used to configure, program and control
the RTHP. The only registers that are not included in the base registers are ones that must link to an analog
input or analog output for external sensors (Temp, Humidity or Dampers). A base data register setting MUST be
set.
FN001 Base data
reg: 00000
To modify the base data register (00000 to 65535, use the keypad as explained in section Entering Decimal
Numbers (see page 341) and press [ENTER].
Base Data Register Offset
Register Offset
Register Function
0 Heating Set Point
1 Cooling Set Point
The heating set point determines the temperature that the RTHP will heat the space to
and is compared with the temperature sensor connected to the Space Temp input.
The cooling set point determines the temperature that the RTHP will cool the space to
and is compared with the temperature sensor connected to the Space Temp input.
2 Relative Humidity Set Point
The relative humidity set point determines at what humidity level the RTHP will go in to
a dehumidification cycle and drive the plant to reduce this amount. The relative humidity
set point when exceeded is added or subtracted using the Hysteresis value to prevent
oscillation of the humidity modes.
3 Heating Hysteresis Setting
The heating hysteresis value is added to the heating set point to allow the plant to drive
slightly beyond the set point. This allows specific heating and cooling tuning. Setting a
value of 0 is not recommended as it can cause the system to oscillate between the dead
band the heating modes.
4 Cooling Hysteresis Setting
The cooling hysteresis value is subtracted from the cooling set point to allow the plant to
drive slightly below the set point. This allows specific heating and cooling tuning. Setting
a value of 0 is not recommended as it can cause oscillations between the dead band and
cooling modes.
5 Relative Humidity Hysteresis Setting
6 Warm Up Set Point
The relative humidity hysteresis value is subtracted or added depending if the set point
has already been exceeded to the relative humidity set point. This allows the relative
humidity cycles to be tuned. Setting a value of 0 is not recommended as it can cause the
system to oscillate between the relative humidity states.
If the warm up set point is not equal to 0 the system will check the space temperature
against the warm up set point when the occupied relay is activated. If the internal temp is
below the warm up set point the system will close the fresh air damper and drive the
heating to achieve the heating set point. Once set point is reached the unit will operate in
a normal mode.
7 Fresh Air Cooling Set Point
If the fresh air cooling set point is not 0 the system will check the fresh air temperature
when a cooling demand exists and modulate the dampers to allow free cooling. The
system will remain in the free cooling mode for the time set by the free cooling time.
228 PRT-CTRL-SE Protege System Controller Reference Manual | PRT-CTRL-SE