Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 110)

Publication 1747-UM010B-EN-P - September 2003
6-14 Module Control and Status Word
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SW-1.6: Last Module in LSL. The 1747-BSN module that the user
intends to be the last in the Local Status Link must have this
switch ON. All the other 1747-BSN modules must have this
switch OFF. If a backup system has only one 1747-BSN in each
processor chassis, this switch must be ON in this module.
The four-position dip switch is used to configure the 1747-BSN
address in the Local Status Link. The table below shows the meaning
of bits 0 through 2 of SASW. Switch SW-2-4 is not used.
Module Status Counters The1747-BSN module counts the changes in the local module’s
significant status and indicates the changes in its Module Status Word.
The counters show all the errors and status changes since the last
power-up and cannot be cleared by the user without powering down
the chassis.
Switch Assemblies Status Word Bits
1747-BSN Address
SW-2.4 SW-2.3 SW-2.2 SW-2.1
Not Used
0 0 0 1
0 0 1 2
0 1 0 3
0 1 1 4
1 0 0 5
1 0 1 6
1 1 0 7
1 1 1 8
Address Counter
M1:s.3420 HSSL Error Counter
M1:s.3421 LSL Error Counter
M1:s.3422 Buffer Full Counter
M1:s.3423 Reserved
M1:s.3424 RIO Comm. Error Counter
M1:s.3425 Processor Fault Counter
M1:s.3426 Switchover Counter