IOtech MultiScan 1200, User Manual

Page: 349 / 364

TempScan / MultiScan User's Manual Appendix 339
Appendix A
IEEE 488 Bus & Serial Bus Lines……339
IEEE 488 Bus Commands……340
ASCII Codes……341
ASCII Code Summary……341
ASCII Code Details……343
IEEE 488 Bus & Serial Bus Lines
Bus State Bus Line Data Transfer (DIO) Lines
8 7 6 5 4 3 2 1
Bus Management Lines
IFC
Interface Clear
REN
Remote Enable
IEEE 488 Interface: Bus Management Lines
ATN
Attention ($04)
0 0 0 0 0 1 0 0
EOI
End-Or-Identify ($80)
1 0 0 0 0 0 0 0
SRQ
Service Request ($40)
0 1 0 0 0 0 0 0
IEEE 488 Interface: Handshake Lines
DAV
Data Valid ($08)
0 0 0 0 1 0 0 0
NDAC
Not Data Accepted ($10)
0 0 0 1 0 0 0 0
NRFD
Not Ready For Data ($20)
0 0 1 0 0 0 0 0
Serial Interface: Bus Management Lines
DTR
Data Terminal Ready ($02)
0 0 0 0 0 0 1 0
RI
Ring Indicator ($10)
0 0 0 1 0 0 0 0
RTS
Request To Send ($01)
0 0 0 0 0 0 0 1
Serial Interface: Handshake Lines
CTS
Clear To Send ($04)
0 0 0 0 0 1 0 0
DCD
Data Carrier Detect ($08)
0 0 0 0 1 0 0 0
DSR
Data Set Ready ($20)
0 0 1 0 0 0 0 0
Hexadecimal & Decimal Values
Hexadecimal Value $80 $40 $20 $10 $08 $04 $02 $01
Decimal Value 128 064 032 016 008 004 002 001