Danfoss AK-CC 550B User Manual page 11

Data communication
The controller has fixed built-in MODBUS data communication.
If there is a requirement for a different form of data
communication, a Lon RS 485 / DANBUSS module can be inserted
in the controller.
The connection must then be to terminal RS 485.
(To use a Lon RS 485 module and gateway type AKA 245 the
module must be Version 6.20 or higher.)
Display
The controller has one plug for a display. Here display type EKA
163B or EKA 164B (max. length 15m) can be connected.
EKA 163B is a display for readings.
EKA 164B is both for readings and operation.
The connection between display and controller may be with a
cable which has a plug at both ends.
If the distance between display and controller is greater than 15
m, the connection must take another form.
An extra module must also be mounted in the controller if data
communication is used.
The built-in MODBUS data communication is used so that the
display connection and the data communication to the other
controllers must take place via a module. The module can be:
Lon RS 485 / DANBUSS or MODBUS.
When a display is to be connected to the built-in MODBUS, the
display can advantageously be changed to one of the same type,
but with Index A (version with screw terminals).
The controllers address must be set higher than 0 in order for the
display to be able to communicate with the controller.
If connection of two displays is required, one must be connected
to the plug (max. 15 m) and the other must then be connected to
the fixed data communication.
(In application 9 and 10, the MODBUS display will show values for
the B section.)
Important
All connections to the data communication MODBUS / DANBUSS
and RS 485 must comply with the requirements for data
communication cables. See literature: RC8AC.
Override
The controller contains a number of functions which can be used together with the override function in the master gateway/system
manager.
Function via data communication
Start of defrosting
Coordinated defrost
Prevent defrost start
Day/Night schedule
Light control
Forced closing
Forced cooling
Railheat link to dew point
P0 optimization
Adaptive defrost
AK-CC 550B
Function in gateway/system manager
Defrost control / Time schedule / Defrost group
Defrost control / Defrost group
Day/Night control / Time schedule / Light zone
Day/Night control / Time schedule
Forced Close / Injection ON / AKC ON
/ Enhanced railheat
P0 Optimization
/ Adaptive defrost. System manager only
Manual RS8GL302 © Danfoss 2016-03
! Address
o03 > 0
Used parameters in AK-CC 550B
--- Def start
--- HoldAfterDef / - - - DefrostState
--- Disable Def
--- Night setback
O39 light Remote
--- Forced cl.
--- Forced cool
--- Dew point
The controller supports P0 optimization
- - - Tc TempMean, MC Def.start
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