Eaton Cutler-Hammer Digitrip RMS 510 Instructions Manual page 55

Page
54
AD
33-855-4
10.2 Setting Digitrip RMS
Communications
Addreis
(Digitrip RMS
810 & 9'10
Kits
OnlY)
NOTE: Setting Digitrip RMS PowerNet Address
providLs the Trip Unit a unique identifica-
iion for communications.
PowerNet
com-
munications may be compromised unless
the Trip Unit, Breaker, and Switchgear Cell
are
matched.
To enable
the
INCOMM communications system
to
identifv each Circuit Breaker individually, the
Dioitri;
BMS 810 & 910 Trip Units have a unique
thrie
digit "ADDRESS" which INCOMM uses
to
identify the Trip Unit and the Circuit Breaker it
controls.
NOTE: Digitrip
81
0 & 910 Trip Units will already
co-ntain a
factory-set Baud Rate and
Address which, in general, will not apply
to
vour network. For proper communications,
each Trip Unit Address and Baud Rate
must be set to the values applicable
for
your network. Similarly, prior to the instal-
iation of
a
Trip Unit into its Circuit Breaker'
or prior
to
installation of a Circuit Breaker
into its compartment (after maintenance for
example), the user should verify that the
Baud Rate and Address are
correct Failure
to
use the correct Baud Rate or Address
can confuse the communication system' lt
is
recommended that the appropriate Baud
Rate, Address, and Circuit Breaker Cell
location or bus or circuit reference be
recorded in the spaces provided on the
Trip Unit Display Panel, for future reference
(see Figure 10-4).
The user can view the present Address and assign
a new
3-digit Address by
the following the proce-
dure detailed below.
NOTE: The Breaker need not be open and may
be
carrying current'
1.
Press
and continue to hold
in
the "Trip Reset"
push button (see Figure 10-4)'
2. Watch the display window and, after about
5 seconds, the kA, MW, or MWh value will
disappear, and either the letter H or L (Baud
Rate code),
followed by the 3-digit Address
(between
OOt
ana 999,
there is no 000) will
appear.
(You
do need to continue to hold in the
"Trip Reset" push button.)
To increment the
Address, press and release
the "Demand Reset" push button near
the
display window (see Figure
10-2). The Address
will increase by one unit each time you press
the Demand Reset push button. lf you press
and hold the Demand Reset push bution, the
Address will increase continuously, slowly at
first, and then faster as you continue to hold
the button in. (Continue to hold
in the Trip
Reset push button while you do this.)
To decrement
the Address, press and release
the "Step" push button, also located near
the
display window (see Figure
10-4). The Address
will decrease by one unit each time you press
the Step push button. lf you press and hold the
Step push button, the Address will decrease
continuously, slowly at first, and then faster as
vou continue to hold the button in. (Continue
to
irold in
the
Trip Reset
push button while you do
this.)
The letter
"H"
refers to the High (9'600) Baud
Rate; and the letter
"L"
refers
to the
Low
(1
.200) Baud Rate' An "X"
in
the
Baud Rate
iietd indicates that neither High nor Low Baud
Rate has been selected. Press and release the
"Test" push button
to
change the Baud Rate'
(You
do need to continue to hold in the Trip
Reset push button.)
Suooestion.' Before you
press
and
release
the
"Ie?
'pusfr
button
set
the
"Test Amps" switch
to
1
to minimize the effect of an unintended
test,
which can occur if
your other
finger
.would
happen to come off the "Trip Reset" push
buion.
For
conect communications,
be sure to
use the Terminating Resistor
at the end of the
tuvisted
pair
(last
element in the INCOMM
chainl. Fiqures
1O-5, 10-6,
and
10-7 show the
tocation 6f the Terminating Resisto/: Refer to T
D.
17-531 for the correct PowerNet wiring
specification.
4.
5.
6. When the Address and Baud Rate code
in
the
display window are correct, release the "Trip
Reset; push button to save the values into the
Trip Unit's non-volatile
memory
and the kA'
MW,
or MWh value will return to the display
window
lf control power
is lost, the Trip Unit
will still know its
(new)
Address and Baud Rate'
ElT.il
Effective 9/01