Danfoss EKE 1C User Manual

Parameter
Function
Description
O010
Ext ref. supply
Dene how the external reference signal is used
1 = V->SH: Displacement of SH reference given by External voltage signal.
2 = V->Max OD: Maximum opening degree of the valve given by external voltage
signal
3 = V->Temp: Displacement of temperature given External voltage signal.
4 = Bus -> SH: Displacement of SH reference given via Modbus.
5 = Bus->Max OD: Maximum opening degree of the valve given via Modbus.
6 = Bus -> T: Displacement of temperature given via Modbus
7 = mA->SH: Displacement of SH reference given by External current signal.
8= Bus->Max OD: Maximum opening degree of the valve given by External cur-
rent signal.
9 = mA->Temp: Displacement of temperature given External current signal.
I034
Ext ref voltage low
Dene min. reference Voltage
I035
Ext ref. voltage high
Dene max. reference Voltage
I036
Ext ref. current low
Dene min. reference current
I037
Ext ref. current high
Dene max. reference current
X010
Bus ext. ref
Readout oset in Kelvin

WARNING:
• SH reference is not allowed to oset the signal below SH min.
• Only analog input AI4 can be set as an analog external reference for displacing references
• EKE1D receives reference parameter via wired CANBus, while EKE 1C, EKE 1B receive it via Modbus.
6.2.4 Compressor feed Forward function
When a compressor speed changes, system dynamics change correspondingly. Hence, Compressor speed feed
forward function changes the PI parameter values according to the actual compressor speed, which means the
reactivity of the controller is changed.
For example, when the speed of the compressor is low, this feature increases the integration time which leads to a
slower response of the PI controller.
To use this feature bus communication is needed and the master controller must send a feed-back about the
compressor speed to the EKE controller.
EKE
1A
1B
1C
1D
Applicable

WARNING:
This function is basically used in one-to-one systems and requires a Modbus (Or CANBus in EKE 1D) to feed the
compressor speed. This functionality may not be used in multi-evaporator system.
Figure 71: compressor feedforward function
Danfoss 80G8305.10
TT
S2
EEV
P
Compressor speed signal via MODbus
Master
control
© Danfoss | Climate Solutions | 2022.06 BC398828796060en-000101 | 49
Superheat controller, Type EKE 1A, 1B, 1C, 1D

Danfoss EKE 1C Specifications

General

Brand	Danfoss
Model	EKE 1C
Category	Controller
Language	English