1747-6.22, Backup Scanner User Manual

9-166 Programming Techniques
Program File 2
0000
0001
0002
Copy the System Status Word (SSW) and the Module Status Word (MSW) from the BSN module to internal storage words in the SLC processor every program scan. Bits 6 and
7 of the SSW word indicate whether this processor is Primary or Secondary at any given time. Bits 6 and 14 of the MSW word indicate whether the local or remote system is in
the Primary or secondary Mode respectively. Virtual SSW and MSW words/bits are used to minimize M-file transfers, thereby minimizes their effects on the program scan time.
Publication 1747-6.22
COP
Copy File
Source #M1:1.3400
Dest #B3:1
Length 2
This rung executes subroutine number 3 when the Local System is in the Secondary Mode. Subroutine 3 contains the logic which must be executed to properly transfer HSSL
data from the Secondary BSN Module to the Secondary SLC Processor.
Virtual SSW Bit:
when = 1, indicates Virtual MSW Bit: Virtual MSW Bit:
the local system is when = 1, indicates when = 1, indicates
in the Secondary the Local System is the Remote System is
Mode
in the Primary Mode in the Primary Mode
B3:1
B3:2
B3:2
JSR
Jump To Subroutine
7
6
14
SBR File Number U:3
This rung executes subroutine number 4 when the Local System is in the Primary Mode. Subroutine 4 contains the logic which must be executed to properly transfer HSSL data
from the Primary SLC Processor to the Primary BSN Module.
Virtual SSW Bit: Virtual MSW Bit: Virtual MSW Bit:
when = 1, the Local when = 1, indicates when = 1, indicates
System is in the the Local System is the Remote System is
Primary Mode in the Primary Mode in the Primary Mode
B3:1
B3:2
B3:2
JSR
Jump To Subroutine
6
6
14
SBR File Number U:4
0003 END