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3 Operation by Front Panel
Register 1 9
Demand Period Length . . . dPrd
Registers 1 4 and 1 6, the phase and ground secondaries, are
always 5.
Registers 1 7 and 1 8, the Tap Ranges, are pre-programmed
based on the style number ordered.
Registers 7, 8, 9 and 1 0, the Instantaneous #1 and #2 Functions,
are options only supplied when ordered.
Thus, you normally only need to program registers 3 through 1 2
in the field. These are the protective settings. The values are
established by a time-current coordination study. You may also
need to make the choices for registers 1 9, 20 and 21 . Values
which have been entered can be viewed by entering the
CONFiguration mode, and scrolling through all items.
3.2.6 Programming the Address
Skip this item if the relay is not equipped with the communi
cations option .
Enter the configuration mode (described above) and advance to
the Addr register by depressing and releasing the NEXT switch.
The SCOR unit address is displayed. This number which ranges
from 1 to 254 is a unique address used for communicating to this
SCOR via its RS-485 port on the back of the case. The number
must be selected such that it is unique among all devices
connected on the same RS-485 loop (multiple devices may be
daisy-chained together on a single communication bus). When
configuring the SCOR to communicate to a Siemens Power
Monitor unit, the address will be used to identify the particular
SCOR.
Relays initially are configured with the address 222. If this has not
been changed , it must be done prior to accessing from the
Power Monitor unit. It is suggested that a list of devices be made
with the information shown in Table 4.
3.2.7 Setting the Baud Rate
Using the procedures described above for entering the
CONFiguration mode, display "bAUd" by advancing to the
second register. (Reference Table 3.) The baud rate may now
be adjusted by raising or depressing the UP/DOWN switch as
required.
Table 4. List of Devices
D ev i c e
Seria l
Circuit
Type
Nu mber
Na m e
3 2 5
Main
#1
SCOR
4700
2 09 2
Main
#1
SCOR
333
Feeder
#1
2 105
Feeder
#1
4700
Use key a ssign ment "A" to change a n address
The baud rates available and their sequence are listed below.
Note that the displayed value requires a multiplier of 1 000 to
arrive at the actual rate.
Baud Rate
1 9, 200
1 9. 20
9,600
9.600
4,800
4.800 (standard for Power Monitor)
2,400
2.400
1 . 200
1 , 200
0.600
600
300
0.300 {The next advance wraps
to 1 9. 20.)
The selected baud rate is loaded into the relay's nonvolatile
memory with the return to OAT A mode. The message "P EE" will
appear briefly on the display to indicate that the new data is
stored in nonvolatile memory
NOTE: The Power Monitor System uses a Baud Rate of 4800.
Page 12
N ew
Address
Locati on
Address/
in
S w gr
Date
2 2 3
Cell 18
32 3
Cell 1 8
2 2 4
Cell 2 A
32 4
Cell 2 A
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