Kingfisher Plus+ Hardware Manual
2.5.5 Setting Slot Number Range
Backplanes have hard-coded slot numbers which, for the BA-x-PLUS modules, can be set to
four different ranges determined by the rack number (please refer to the ‘
Setting Rack
Number’ section of this chapter for details). The BP-x-PLUS backplanes slot numbering
range is not configurable and always starts from #1.
The BP-x-PLUS, BA-6-PLUS and BA-12-PLUS backplanes occupy the start of each rack,
while the BA-4-PLUS (and BA-40-PLUS) occupies the last four slot numbers in each rack
(e.g. #13 to #16 in Rack 1). Starting from v3.3, the BA-4-PLUS / BA-40-PLUS backplanes
can be used in the beginning of the rack as well. To achieve this, the BA-4-PLUS / BA-40-
PLUS backplanes are equipped with an extended 10-way DIP-switch. Switches #9 and #10
are used to configure the desired slot numbering range (see the figure below for possible
switch configurations).
Slots numbered from 1 to 4 (for Rack 1) Slots numbered from 13 to 16 (for Rack 1)
Slot Number Range control switches (BA-4-PLUS & BA-40-PLUS only)
The configuration when both #9 and #10 switches are turned ON (factory default setting) is
equal to the left picture above (Slots are numbered from 1 to 4 for Rack 1) but increases
current consumption from the 5V rail by 3 mA approximately. The configuration with both #9
and #10 switches turned OFF should not be used as the slot numbering setting becomes
undefined.
An example of the possible RTU configuration, explaining rack and slot numbering
sequence, is shown on the picture below.
Hardware Manual Version 7.16
http://www.servelec-semaphore.com/
Page 33
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