Product Overview

© Danfoss | DCS | 2019.04
Data sheet | Superheat controller type EKE 1A, EKE 1B, EKE 1C
DKRCC.PD.RS0.A4.02 | 49
18.0 SH or Temp
Reference via
External signal
Superheat reference or temperature reference can be oset by external analog signal.
SH reference is not allowed to oset the signal below SH min.
Parameter (R006 Ext. ref oset max. ,R106 Ext. ref oset min. ) dene the range of the oset,
parameter (I034, I035) and (I036, I037) dene the signal range of the external signal (default is
0-10 V and 4-20mA)
Note:
The curve can be dened
in reverse direction as well.
18.1 SH reference
Using the SH Reference via the analog input a displacement can be made of the temperature
reference or of the superheat reference. The signal can either be a current signal or voltage signal.
The reference can be displaced in positive or negative direction.
EKE 1A 1B 1C
Applicable
Parameter Function Description
O010 Ext ref. conguration
dene how the external refernce signal is used
7 = mA->SH: External current signal oset superheat reference
1 = V->SH: External voltage signal oset superheat reference
4 = Modbus - SH : Modbus give oset to superheat reference
I037 Ext ref. current high if O010=3, dene max. reference current
I036 Ext ref. current low if O010=3, dene min. reference current
I035 Ext ref. voltage high if O010=4, dene max. reference Voltage
I034 Ext ref voltage low if IO010=4, dene min. reference Voltage
X010 Bus ext. ref. if O010=5, readout oset in Kelvin
I037 Ext ref. current high if O010=3, dene max. reference current
I036 Ext ref. current low if O010=3, dene min. reference current
I035 Ext ref. voltage high if O010=4, dene max. reference Voltage
I034 Ext ref voltage low if IO010=4, dene min. reference Voltage
X010 Bus ext. ref. if O010=5, readout oset in Kelvin
Parameter Function Description
O010 Ext ref. conguration
dene how the external refernce signal is used
9 = mA->Temp: External current signal oset temperature reference
3 = V->Temp : External voltage signal oset temperature reference
6 = Modbus->T: Modbus give oset to temperature reference
18.2 Temperature reference
Temperature reference can be change as descripted above using either 0 – 20 mA signal or
4 – 20 mA signal.
The thermostat reference can be displaced via an external voltage signal which is particularly
useful for process cooling. The signal may be e.g 0 – 5 V or user dened voltage signal. Two
oset values must be set, one indicating the displacement at minimum signal and another
indicating the displacement at maximum signal. The displacement will apply to all sections.
The displacement will not aect the alarm limits.
EKE 1A 1B 1C
Applicable
-
Voltage
Offset
I035
Ext ref. voltage high
0
I034
Ext ref. voltage low
R006
Ext. ref offset max.
R106
Ext. ref offset min
10
5
Danfoss 80G354.10
Danfoss 80G356.10
Curren
t
Offset
I037
Ext ref. current high
I036
Ext ref. current low
R006
Ext. ref offset max
.
R106
Ext. ref offset min
4
20
4
-2