Hussmann RDI-27 Installation & Operation Manual page 43

Digital input signal - D2
The controller has a digital input 2 which can be used for one of the following func-
tions:
O : 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 refrig-
eration and the fans are stopped. When the time setting in "A4" is passed, an alarm
will be given and refrigeration resumed.
3) Door alarm. When the input is open it signals that the door is open. When the time
setting in "A4" is passed an alarm will be given.
4) Defrost. The function is started with a pulse signal. 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 regula-
tion 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 operation.
7) Reference displacement when DI2 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.
10) Case cleaning. The function is started with a pulse signal. Cf. also description on
page 4.
11) Forced refrigeration at hotgas defrost when the input is short-circuited.
12) The input is used for coordinated defrost in conjunction with other controllers of
the same type
Con guration of light function (relay 4 in applications 2 and 6)
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 de ned in either o02 or o37 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 o .
Activation of light relay
The light relay can be activated here, but only if de ned in o38 with setting 2.
Rail heat during day operation
The ON period is set as a percentage of the time
Rail heat during night operation
The ON period is set as a percentage of the time
Rail heat cycle
The period of time for the aggregate ON time + OFF time is set in minutes
Case cleaning
The status of the function can be followed here or the function can be started manu-
ally.
0 = Normal operation (no cleaning)
1 = Cleaning with fans operating. All other outputs are O .
2 = Cleaning with stopped fans. All outputs are O .
If the function is controlled by a signal at the DI1 or DI2 input, the relevant status can
be seen here in the menu.
Selection of application
The controller can be de ned in various ways. Here you set which of the 10 applica-
tions is required. On page 6 you can see a survey of applications.
This menu can only be set when regulation is stopped, i.e. "r12" is set to 0.
Transfer a set of presetting to the controller
It is possible to select a quick setting of a number of parameters. It depends on
whether an application or a room is to be controlled and whether defrost is to be
stopped based on time or based on temperature. The survey can be seen on page 22.
This menu can only be set when regulation is stopped, i.e. "r12" is set to 0.
After the setting the value will return to 0. Any subsequent adjustment/setting of
parameters can be made, as required.
Access code 2 (Access to adjustments)
There is access to adjustments of values, but not to con guration settings. If the set-
tings in the controller are to be protected with an access code you can set a numeri-
cal 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.
Copy the controller's present settings
With this function the controller's settings can be transferred to a programming key.
The key can contain up to 25 di erent sets. Select a number. All settings except for
Application (o61) and Address (o03) will be copied. When copying has started the dis-
play returns to o65. After two seconds you can move into the menu again and check
whether the copying was satisfactory.
Showing of a negative gure spells problems. See the signi cance in the Fault Mes-
sage section.
14 Manual RS8EP502 © Danfoss
o37 DI2 con g.
o38 Light con g
o39 Light remote
o41 Railh.ON day%
o42 Railh.ON ngt%
o43 Railh. cycle
o46 Case clean
o61 --- Appl. Mode (only output in Danfoss
only)
o62 -
o64 -
o65 -
12-2015
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