TAC AB, 1999-08-18
0-004-7516-1 (GB), 5:7 (16)
TAC Xenta 102 Handbook
Functional description
nviSetPntOffset can be regarded as a setpoint adjustment from a
wall module connected to the network. Its value is added to
setpoints for comfort and economy mode.
In Appendix A there are detailed calculation examples of
setpoint calculation.
1
The wall module’s setpoint knob only affects comfort and economy mode.
2
In comfort mode, the setpoints for method A and method B are the same.
Figure 5.6 The relation between variables for the setpoint calculation.
1
2
2
nviSetpntOffset
Wall module
setpoint knob
nviSetpoint
nciAppOptions bit 9
Calculation
according to
method A or B
if nviSetpoint
has a valid
value, otherwise
no recalculation
nciSetpoints
Comf., ool.setp.
Comf., heat.setp.
Econ., cool.setp.
Econ., heat. setp.
Addition
Addition
Control-
ler
nvoEffect-
Setpt
Index Variable name
Description
2
nvoUnitStatus
Unit status output
4
nvoEffectSetpt
Effective setpoint output
14
nviApplicMode
Application mode input
16
nviSetpoint
Temperature setpoint input
17
nviSetpntOffset
Setpoint offset input
24
nciAppOptions
Application options
25
nciSetpoints
Occupancy temperature setpoints