Statement Bus Action Summary
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The following tables show the bus actions that take place when the various IEEE-488 control statements are executed. The table is broken down into System and Non-System Controller, then into Active and Non-Active Controller, and further subdivided into interface select code only or primary address specified. The mnemonics used in the tables are listed below:
ATN - Attention Line PPD - Parallel Poll Disable
DCL - Device Clear PPE - Parallel Poll Enable
EOI - End or Identify PPU - Parallel Poll Unconfigure
GET - Group Execute Trigger REN - Remote Enable
GTL - Go to Local SDC - Selected Device Clear
IFC - Interface Clear SPD - Serial Poll Disable
LAG - Listen Address Group SPE - Serial Poll Enable
LLO - Local Lockout TAG - Talk Address Group
MLA - My Listen Address TCT - Take Control
MTA - My Talk Address UNL - Unlisten
PPC - Parallel Poll Configure UNT - Untalk
ABORT
System Controller
|
Not System Controller
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Active Controller
|
Not Active Controller
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Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
IFC
REN
~ATN
|
Error
|
IFC
REN
~ATN
|
Error
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ATN
MTA
UNL
~ATN
|
Error
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No Action
|
Error
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CLEAR
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ATN
DCL
|
ATN
MTA
UNL
LAG
SDC
|
Error
|
Error
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ATN
DCL
|
ATN
MTA
UNL
LAG
SDC
|
Error
|
Error
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LOCAL
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
~REN
~ATN
|
ATN
MTA
UNL
LAG
GTL
|
~REN
|
Error
|
ATN
GTL
|
ATN
MTA
UNL
LAG
GTL
|
Error
|
Error
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LOCAL LOCKOUT
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ATN
LLO
|
Error
|
Error
|
Error
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ATN
LLO
|
Error
|
Error
|
Error
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PASS CONTROL
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
Error
|
ATN
UNL
TAG
TCT
~ATN
|
Error
|
Error
|
Error
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ATN
UNL
TAG
TCT
~ATN
|
Error
|
Error
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PPOLL
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
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ATN
EOI
read
~EOI
ATN*
|
Error
|
Error
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Error
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ATN
EOI
read
~EOI
ATN*
|
Error
|
Error
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*Restore ATN to previous state
PPOLL CONFIGURE
System Controller
|
Not System Controller
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Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
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ISC Only
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Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
Error
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ATN
MTA
UNL
LAG
PPC
PPE
|
Error
|
Error
|
Error
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ATN
MTA
UNL
LAG
PPC
PPE
|
Error
|
Error
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PPOLL UNCONFIGURE
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ATN
PPU
|
ATN
MTA
UNL
LAG
PPC
PPD
|
Error
|
Error
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ATN
PPU
|
ATN
MTA
UNL
LAG
PPC
PPD
|
Error
|
Error
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REMOTE
System Controller
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Not System Controller
|
Active Controller
|
Not Active Controller
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Active Controller
|
Not Active Controller
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ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
REN
~ATN
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REN
ATN
MTA
UNL
LAG
|
REN
|
Error
|
Error
|
Error
|
Error
|
Error
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SPOLL
System Controller
|
Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
Error
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ATN
UNL
MLA
TAG
SPE
~ATN
read
ATN
SPD
UNT
|
Error
|
Error
|
Error
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ATN
UNL
MLA
TAG
SPE
~ATN
read
ATN
SPD
UNT
|
Error
|
Error
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TRIGGER
System Controller
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Not System Controller
|
Active Controller
|
Not Active Controller
|
Active Controller
|
Not Active Controller
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
|
ISC Only
|
Primary
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ATN
GET
|
ATN
MTA
UNL
LAG
GET
|
Error
|
Error
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ATN
GET
|
ATN
MTA
UNL
LAG
GET
|
Error
|
Error
|