
Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
258 Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Day and night switching
Using a day/night changeover other setpoints can be entered for specific times. The
day/night changeover control can be realized e.g. using an external signal via DI4 or using
free blocks and the real time clock via p31025.
Note
When the multi-zone control is activated, the analog inputs are newly interconnected as
sources for the setpoint and actual value of the technology controller (see table).
Table 7- 46 Parameters to set the multi-zone control:
Parameter Description
p2200 = … Technology controller enable
p2251 Set technology controller as main setpoint
Multi-zone control interconnection
(factory setting = 0)
A subsequent parameterization is performed by activating or deactivating the multi-
zone control.
Subsequent connection for p31020 = 1 (activate multi-
zone control)
Subsequent connection
for p31020 = 0
(deactivate multi-zone
control)
P31020 = …
p31023[0] = 0755.0 (AI0)
p31023[2] = 0755.1 (AI1)
p31026[0] = 0755.2 (AI2)
p31026[1] = 0755.3 (AI3)
p2253 = 31024 (setpoint output, technology controller)
p2264 = 31027 (actual value output, technology
controller)
p31023[0] = 0
p31023[2] = 0
p31026[0] = 0
p31026[1] = 0
p2253 = 0
p2264 = 0
P31021 = … Configuration of multi-zone control
• 0 = Setpoint 1 / several actual values (factory setting)
• 1 = Two zones / maximum value setting
• 2 = Two zones / minimum value setting
p31022 = … Processing of actual values for multi-zone control(only for p31021 = 0)
Possible values: 0 … 11 (factory setting = 0)
p31023[0 … 3]
= …
Setpoints for multi-zone control
Parameters for selecting the source for setpoints in multi-zone control (factory
setting = 0)
r31024 = … Multi-zone control setpoint output for technology controller
CO parameters
p31025 = … Day/night changeover for multi-zone control
Parameter for selecting the source for day/night changeover of the multi-zone
control (factory setting = 0)
p31026[0 … 2]
= …
Actual values for multi-zone control
Parameters for selecting the source for actual values of the multi-zone control
(factory setting = 0)
r31027 = … Multi-zone control actual value output for technology controller
CO parameters
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