User Manual

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Building Technologies Integration von DESIGO™ RXC in VISONIK CM2Z8338en_01
Building Automation Integration functions 12.06.2006
3.2.4 Define controller operating mode
All RXC applications
VISONIK BPS NIDES.RX RXC controller
DP.Parameter Function/Range NV name / element Function/Range
BT
User designation NV name NV element
@TCRn.RLHT
@TCRn.RLCO
See table of bindings
→
nvoApplicMode
Controller application mode
(see table of bindings)
→
1
Application Mode nviApplicMode
Table of bindings
@TCRn.RLHT @TCRn.RLCO
Application Mode Description
1 1
Ö
0 = HVAC_AUTO Normal operation (heating and cooling possible)
1 0
Ö
1 = HVAC_HEAT Heating only (cooling sequence disabled)
0 1
Ö
3 = HVAC_COOL Cooling only (heating sequence disabled)
0 0
Ö
9 = HVAC_FAN_ONLY
Ventilation only (heating and cooling sequence
disabled)
In changeover applications, therefore, the changeover has to be effected between the two operating modes HVAC_HEAT (winter) and HVAC_COOL (summer) As can be seen
from the binding table, new values must be assigned in each case to the two parameters RLHT and RLCO.
For this purpose it is recommended that you should effect the
changeover via the intermediate state RLHT / RLCO = 1 / 1 (i.e. HVAC_AUTO).
Note The question of which operating modes are actually supported depends, of course, on the application in the RXC controller. For radiator applications, for
example, the operating modes HVAC_COOL and HVAC_FAN_ONLY have no effect.
Caution The NV “Application Mode” is also used by the “Night purge” function. Since the last-received value is always valid in the RXC controller, the functions can
influence each other mutually.
Note The other values of the NV "Application Mode" are only supported via the associated link point from CFE Version 2.1.