Danfoss EKC 202B Manual page 12

Miscellaneous
Delay of output signal after start-up
After start-up or a power failure the controller's functions can be delayed so that overloading of
the electricity supply network is avoided.
Here you can set the time delay.
Digital input signal - DI
The controller has a digital input which can be used for one of the following functions:
Off: The input is not used
1) Status display of a contact function
2) Door function. When the input is open it signals that the door is open. The refrigeration and
the fans are stopped. When the time setting in "A04" is passed, an alarm will be given and
refrigeration will be resumed.
3) Door alarm. When the input is open it signals that the door is open. When the time setting in
"A04" is passed, there will be alarm.
4) Defrost. The function is started with a pulse pressure. The controller will register when the DI
input is activated. The controller will then start a defrost cycle. If the signal is to be received by
several controllers it is important that ALL connections are mounted the same way (DI to DI
and GND to GND).
5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is
stopped when the input is put in pos. OFF.
6) Night operation. When the input is short-circuited, there will be regulation for night opera-
tion.
7) Reference displacement when DI1 is short-circuited. Displacement with "r40".
8) Separate alarm function. Alarm will be given when the input is short-circuited.
9) Separate alarm function. Alarm will be given when the input is opened. (For 8 and 9 the time
delay is set in A27)
10) Case cleaning. The function is started with a pulse pressure. Cf. also description on page 4.
11) Inject on/off. Off when DI is open.
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.
The installation of the data communication cable has been mentioned in a separate
document "RC8AC".
The address is set between 1 and 240, gateway determined
The address is sent to the system manager when the menu o04 is set to 'ON' , or when the system
manager's scanning function is activated. (o04 is only to be used if the data communication is
LON.)
Access code 1 (Access to all settings)
If the settings in the controller are to be protected with an access code you can set a numerical
value between 0 and 100. If not, you can cancel the function with setting 0. (99 will always give
you access).
Sensor type
Normally a Pt 1000 sensor with great signal accuracy is used. But you can also use a sensor with
another signal accuracy. That may either be a PTC sensor (1000 ohm at 25°C) or an NTC sensor
(5000 Ohm at 25°C).
All the mounted sensors must be of the same type.
Display step
Yes: Gives steps of 0.5°
No: Gives steps of 0.1°
Max. standby time after coordinated defrost
When a controller has completed a defrost it will wait for a signal which tells that the refrigera-
tion may be resumed. If this signal fails to appear for one reason or another, the controller will
itself start the refrigeration when this standby time has elapsed.
Configuration of light function
1) The relay cuts in during day operation
2) The relay to be controlled via data communication
3) The relay to be controlled by the door switch defined in either o02 where the setting is
selected to either 2 or 3. When the door is opened the relay will cut in. When the door is closed
again there will be a time delay of two minutes before the light is switched off.
Activation of light relay
The light relay can be activated here (if 038=2)
Case cleaning
The status of the function can be followed here or the function can be started manually.
0 = Normal operation (no cleaning)
1 = Cleaning with fans operating. All other outputs are Off.
2 = Cleaning with stopped fans. All outputs are Off.
If the function is controlled by a signal at the DI input, the relevant status can be seen here in the
menu.
Access code 2 (Access to adjustments)
There is access to adjustments of values, but not to configuration settings. If the settings in the
controller are to be protected with an access code you can set a numerical value between 0 and
100. If not, you can cancel the function with setting 0. If the function is used, access code 1 (o05)
must also be used.
12 Manual RS8DZ702 © Danfoss 03-2012
Miscellaneous
o01 DelayOfOutp.
o02 DI 1 Config.
Definition takes place with the numerical
value shown to the left.
(0 = off )
DI state
(Measurement)
The DI input's present status is shown here.
ON or OFF.
After installation of data communication
the controller can be operated on an equal
footing with the other controllers in ADAP-
KOOL® refrigeration controls.
o03
o04
o05 -
o06 SensorConfig
Pt = 0
PTC = 1
NTC = 2
o15 Disp. Step = 0.5
o16 Max HoldTime
o38 Light config
o39 Light remote
o46 Case clean
o64 -
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