Rockwell Automation 1747-BSN Backup Scanner Module - Manual (Page 100)

Publication 1747-UM010B-EN-P - September 2003
6-4 Module Control and Status Word
Module Status Word The Module Status Word (MSW) shows the status of the 1747-BSN
module itself and its counterpart in the remote system. Bits 0 through
7 show the local status while bits 8 through 15 show the remote
status. The module status bits have the following meaning:
•
HSSL High-Speed Serial Link status: This bit is set when the
HSSL is faulted or has communication errors in the local
1747-BSN module (bit 0) or in the remote one (bit 8). The
normal state of this bit is OFF.
•
LSL Local Status Link status: This bit is set when the Local
Status Link is not working well in the local system (bit 1) or
remote system (bit 9). If the system has only one 1747-BSN
module in each chassis, then the LSL is not used and this bit is
reset. The normal state of this bit is OFF.
•
Buffer Full: This bit is set when the secondary 1747-BSN is
receiving a second block of data before the reading of the first
block by the secondary SLC 5/0x. It could be occurring in the
local system (bit 2) or remote system (bit 10).
•
DH+ Communication: This bit is set when a problem occurs
with the DH+ network in the local (bit 3) or remote (bit 11)
1747-BSN module. The type of problem that may occur is
different for primary and secondary systems (as shown below).
The normal state of this bit is OFF):
1. Primary mode: The network is down or the channel is seeing
communication errors.
2. Secondary mode: Communication errors to the secondary
SLC 5/04.
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
14
0
15 13 12 11 10 9 8 7 6 5 4 3 2 1 0
HSSL
LSL
DH+ Communication
RIO Communication
Processor Fault
Primary/Secondary System
Reserved
HSSL
LSL
Buffer Full
DH+ Communication
Buffer Full
LOCAL MODULE BITS
REMOTE MODULE BITS
RIO Communication
Processor Fault
Primary/Secondary System
Reserved
MSW