Statement Bus Action Summary

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
Active Controller		Not Active Controller		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	ATN MTA UNL ~ATN	Error	No Action	Error

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	ATN DCL	ATN MTA UNL LAG SDC	Error	Error

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

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	ATN LLO	Error	Error	Error

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	ATN UNL TAG TCT ~ATN	Error	Error

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
ATN EOI read ~EOI ATN*	Error	Error	Error	ATN EOI read ~EOI ATN*	Error	Error

*Restore ATN to previous state

PPOLL CONFIGURE

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 MTA UNL LAG PPC PPE	Error	Error	Error	ATN MTA UNL LAG PPC PPE	Error	Error

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	ATN PPU	ATN MTA UNL LAG PPC PPD	Error	Error

REMOTE

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	REN ATN MTA UNL LAG	REN	Error	Error	Error	Error	Error

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	ATN UNL MLA TAG SPE ~ATN read ATN SPD UNT	Error	Error	Error	ATN UNL MLA TAG SPE ~ATN read ATN SPD UNT	Error	Error

TRIGGER

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 GET	ATN MTA UNL LAG GET	Error	Error	ATN GET	ATN MTA UNL LAG GET	Error	Error