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Preliminary 003
Access V4.X Configuration manual
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2019-05-13
Efficiency presentation
Defrosting
Damper
Fan setpoint compensation
It is possible to select whether the compensation (0...10000) should increase or decrease the fan
setpoint. The 0...10000 compensation follows the current control quantity for the fans.
Configuration > Functions > Function Activation> Heating/Cooling sequence setup > Fan
heating/cooling
Data & Settings > Temperature control > Fan heating/cooling
Step controller
Two step controllers are available if electric heater, DX cooler or change-over is used for heating or
cooling. The internal signal is then used to activate digital outputs for control of the heaters/chillers.
In order to get acces to step controller settings the Heating or Cooling sequences have to be configured
first.
Configuration > Functions > Function activation > Heating/Cooling sequence setup >
The configured sequence now can be used by step controller
Configuration > Functions > Function activation > Heating/Cooling sequence setup > Step
controller
Two operation modes for step controllers are available:
Sequential control
Each output step has individually settable on and off values in percent of the control signal.
The number
of steps is equal to the number of heater/chiller groups.
Minimum on and off times can be set, i.e. the
minimum time the step has to be inactive or active for a change to occur.
Binary control
The heater power outputs should be binary weighted (1:2:4:8 for 4 step controller). The number of loads
to be controlled is set. Thereafter the program will automatically calculate the individual activation
levels.
Switching differential and minimum on/off times can be set. The number of heating steps will be:
2no. of groups-1.
In binary mode, the analogue output signal may be used to fill out between the steps.
The signal will go 0…100 % between the activation of each step. The load connected to the analogue
signal should have the same size as the smallest of the binary groups. In the example below there are 4
heater groups (1:1:2:4) and the total number of heating steps is eight.