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6.2.7 Setting the master/slave identifier
When several cooling units are linked together (up to
a maximum of 10), one of the cooling units must be
defined as the "master" and the others as "slaves".
To this end, assign a corresponding identifier
(address) to each cooling unit which will enable the
cooling unit to be identified in the network.
If one of the slave units reaches the set temperature
or in the case of the door limit switch function, the
affected slave unit will report to the master unit,
which will then switch off all the other cooling units.
Notes:
– Only one unit may be configured as
master, and its identifier must match the
number of slave units.
– The slave units must have different
identifiers.
– The identifiers must be in ascending
order without any gaps.
On the
master cooling unit
set the number of slave units contained in the net-
work:
01: Master with 1 slave cooling unit
02: Master with 2 slave cooling units
03: Master with 3 slave cooling units
04: Master with 4 slave cooling units
05: Master with 5 slave cooling units
06: Master with 6 slave cooling units
07: Master with 7 slave cooling units
08: Master with 8 slave cooling units
09: Master with 9 slave cooling units
On the
slave cooling unit
set its own address:
11: Slave cooling unit no. 1
12: Slave cooling unit no. 2
13: Slave cooling unit no. 3
14: Slave cooling unit no. 4
15: Slave cooling unit no. 5
16: Slave cooling unit no. 6
17: Slave cooling unit no. 7
18: Slave cooling unit no. 8
19: Slave cooling unit no. 9
Rittal cooling unit assembly instructions
(00 = factory setting),
(00 = factory setting),
Master
Slave
02
11
Fig. 38: Master/slave connection (example)
For further connection examples, see "4.6.1 Bus
connection (only in conjunction with several units
with a Comfort controller)", page 13.
For details of how to set the identifier, see "6.2.4
Variable parameters", page
ming overview", page 27, parameter "Ad".
6.2.8 Evaluating system messages
In the Comfort controller, system messages are indi-
cated by a number in the display.
Following the appearance of messages A03, A06
and A07 and after rectifying their cause, you will
need to reset the Comfort controller (see "6.2.9
Resetting the Comfort controller", page 31).
6 Operation
Slave
12
26
or "6.2.5 Program-
29
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