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DKRCC.PS.R1.A3.02 / 520H9752
© Danfoss A/S (DCS-IMCGPD/sw), 2015-03
Manual
Electronic superheat controller, type EKC 312
Function
Parameter Parameter by operation via data communication
Miscellaneous
Miscellaneous
Address
If the controller is built into a network with data communication,
it must have an address, and the master gateway of the data
communication must then know this address.
These settings can only be madewhen a data communication
modulehas been mounted in the controller and the installation of
the data communication cable has been completed.
This installation is mentioned in a separate document “RC8AC”.
Following installation of a data communication
module, the controller can be operated on a par with
the other controllers in ADAP-KOOL® refrigeration
controls
The address is set between 1 and 60 (119)
o03
-
The address is sent to the gateway when the menu is set in pos. ON
(The setting will automatically change back to Off after a few
seconds).
o04
-
Frequency
Set the net frequency.
o12
50/60 Hz
(50=0, 60=1)
Select signal for showing display
Here you can select the signal to be shown in the normal display.
The signal is also transmitted to the analog output. See o09.
1: Superheat
2: Valve’s opening degree
3: Air temperature
(If you during operation give the lower button a brief push, you can
see the following: The S4 temperature, if 1 has been selected. The
superheat reference, if 2 has been selected. Temperature reference if
3 has been selected).
o17
Display mode
Manual control of outputs
For service purposes the individual relay outputs and the
ETS-output can be forced.
However only when regulation has been stopped.
OFF: No override.
3: Alarm relay is activated (connection established between
terminals 12 and 13).
After 600 seconds the manual control will be interrupted, and the
setting will return to ”0”.
In settings 3, ”o45” will become active and the ETS output can be set
manually.
o18
Manual ctrl
Manual control of the ETS valve
When ”o18” is activated the valve’s opening degre can be
determined from this menu.
o45
Manual ETS OD%
Working range for pressure transmitter
Depending on the application a pressure transmitter with a given
working range is used. This working range (say, -1 – 12 bar) must be
set in the controller. The min. value is set.
o20
MinTransPres.
The max. value is set
o21
MaxTransPres.
Selection of control mode (loop Ctrl)
Depending on the application control can be carried out based on
different parameters.
The two possibilities are shown in appendix 4.
1=normal control
2=double loop
The initial or factory setting for Loop Ctrl (o56) is 1, and factory
settings for Kp factor (n04) is 3.0 and KpTo (n20) is 0.4.
When Loop Ctrl. is set for 2, Kp factor and KpTo will be initially set
to 0.7 and 3.0 respectively. Changes can still be made to these
parameters when Loop Ctrl is changed.
When Loop Ctrl is set to 1, Kp factor and KpTo are set to factory
settings.
Note, Loop Ctrl. can only be changed when Main Switch (r12) is off.
o56
Loop ctrl
Survey of functions