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3.8
Electronic Controller EC2-551
3.8.1 Binding Process
EC2-551 controllers are pre-programmed as "Master" controllers by default.
However, in a condensing unit network only one "Master" is allowed, all other controllers
need to become "Slaves".
Controller 1: Compressor
Controller 2: Fan
Value to be displayed :
LED ON: pressure
LED OFF: temperature
Active alarm
Compressor 2 :on
The number of controllers that can communicate is limited to 4 (maximum 4 units in a
network).
The following steps should be taken to set the communication links between the
controllers ("binding"):
1)
2)
3)
4)
5)
6)
7)
8)
9)
Automatically the controller where the binding process was initiated will become the
master and all other units will be configured as slaves. This avoids setting manually the
configuration parameter "c3" on every controller
If the binding process was successful, the service LED should blink on every controller in
the binding group when traffic arrives on the input network variable
3.8.2 Timeout on binding process (Escape function)
When the binding process is initiated on a controller (display shows blinking "b1") and
the operator doesn't press any key during 2 minutes, a timeout brings the controller back
into normal operation without changing anything.
3.8.3 Delete bindings
1)
2)
3)
C6.1.4/0305/E
Condensing Unit For Refrigeration Networks
IR service LED
Fan : on
Compressor 1 :on
Press the "defrost" button for 5 sec. min. on the unit which should become
the Master (this unit will take care of compressor staging). The master unit
will be also typically the one with a digital compressor (if applicable) or the
one with a compressor to cover the base load).
Enter the "password" : default = 12
Press "Sel" key. The Display shows a blinking b1 (master unit)
Press the "Service Pin" button for 1 sec. min. on every slave unit that will take
part of the paralleling group.
The display on the master increments the digit following the "b". The number
of slave units is restricted to 3. (b2 to b4)
To execute the binding process, press the "defrost" button for 5 sec. Min.
Enter the "password" : default = 12
Press "Sel" key
The Display on every controller shows "---" for 10 sec, resets and goes to
normal operation.
Initiate binding process on a controller (display shows blinking "b1").
Terminate binding process on this controller without pressing any service key
on other controllers. ("b1" is still displayed)
The binding memory on the local controller will be cleared and the controller
will be set to master mode.
By altering parameters, controllers
can be turned into Slaves and the
Master can identify which
controllers it has to communicate
with. This process is called
"binding" and is almost automatic.
Commission the controllers
together before modifying the
system parameters.
NOTE Digital Scroll™ condensing
unit needs to be allocated as
Master unit always! (Modulated
compressor should always start
first.)
29
Part no: 3136433
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