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ANSI/IEEE Std 488.1-1987 IEEE Standard Digital Interface for Programmable Instrumentation -Description

Content +

  • 1. General
    • 1.1 Scope
    • 1.2 Object
    • 1.3 Definitions
      • 1.3.1 General System Terms
      • 1.3.2 Units Connected Via the Interface System.
      • 1.3.3 Signals and Paths
    • 1.4 Interface System Overview
      • 1.4.1 Interface System Objective
      • 1.4.2 Fundamental Communication Capabilities
      • 1.4.3 Message Paths and Bus Structure
      • 1.4.4 Interface System Elements
    • 1.5 References
  • 2. Functional Specifications
    • 2.1 Functional Partition
      • 2.1.1 Device Functions
      • 2.1.2 Interface Function Concepts
      • 2.1.3 Message Concepts
    • 2.2 Notation Used to Specify Interface Functions
      • 2.2.1 State Diagram Notation
      • 2.2.2 Message Output Notation
    • 2.3 Source Handshake (SH) Interface Function
      • 2.3.1 General Description
      • 2.3.2 SH Function State Diagram
      • 2.3.3 SH Function State Descriptions
      • 2.3.4 SH Function Allowable Subsets
      • 2.3.5 Additional SH Function Requirements and Guidelines
    • 2.4 Acceptor Handshake (AH) Interface Function
      • 2.4.1 General Description
      • 2.4.2 AH Function State Diagram
      • 2.4.3 AH Function State Descriptions
      • 2.4.4 Acceptor Function Allowable Subsets
      • 2.4.5 Additional AH Function Requirements and Guidelines
    • 2.5 Talker (T) Interface Function (Includes Serial Poll Capabilities)
      • 2.5.1 General Description
      • 2.5.2 T Function State Diagrams
      • 2.5.3 T Function State Descriptions
      • 2.5.4 T Function and TE Function Allowable Subsets
      • 2.5.5 Additional T and TE Interface Function Requirements and Guidelines
    • 2.6 Listener (L) Interface Function
      • 2.6.1 General Description
      • 2.6.2 L Function State Diagram
      • 2.6.3 L Function State Descriptions
      • 2.6.4 L Function and LE Function Allowable Subsets
      • 2.6.5 Additional L or LE Requirements and Guidelines
    • 2.7 Service Request (SR) Interface Function
      • 2.7.1 General Description
      • 2.7.2 SR Interface Function State Diagrams
      • 2.7.3 SR State Description
      • 2.7.4 SR Interface Function Allowable Subsets
      • 2.7.5 Additional SR Interface Function Requirements and Guidelines
    • 2.8 Remote Local (RL) Interface Function
      • 2.8.1 General Description
      • 2.8.2 RL Function State Diagram
      • 2.8.3 RL State Descriptions
      • 2.8.4 RL Function Allowable Subsets
      • 2.8.5 Additional RL Interface Function Requirements and Guidelines
    • 2.9 Parallel Poll (PP) Interface Function
      • 2.9.1 General Description
      • 2.9.2 PP Function State Diagram
      • 2.9.3 PP State Descriptions
      • 2.9.4 PP Interface Function Allowable Subsets
      • 2.9.5 Additional PP Interface Function Requirements and Guidelines
    • 2.10 Device Clear (DC) Interface Function
      • 2.10.1 General Description
      • 2.10.2 DC Function State Diagram
      • 2.10.3 DC Function State Descriptions
      • 2.10.4 DC Interface Function Allowable Subsets
      • 2.10.5 Additional DC Function Requirements and Guidelines
    • 2.11 Device Trigger (DT) Interface Function
      • 2.11.1 General Description
      • 2.11.2 DT Function State Diagram
      • 2.11.3 DT Function State Descriptions
      • 2.11.4 DT Interface Allowable Subsets
      • 2.11.5 Additional DT Function Requirements and Guidelines
    • 2.12 Controller (C) Interface Function
      • 2.12.1 General Description
      • 2.12.2 C Function State Diagram
      • 2.12.3 C State Descriptions
      • 2.12.4 C Interface Function Allowable Subsets
      • 2.12.5 Additional C Function Requirements and Guidelines
    • 2.13 Remote Message Coding and Transfer
      • 2.13.1 Remote Message Coding
      • 2.13.2 Remote Message Coding Concepts
      • 2.13.3 Remote Message Transfer
      • 2.13.4 Remote Message Coding Table Organization and Conventions
      • 2.13.5 Remote Message Coding Table Perspective
      • 2.13.6 Summary Notes and Symbols for Remote Message Coding Table
      • 2.13.7 ISO Code Representation: Message Coding Guidelines
      • 2.13.8 State Transition Timing Values
  • 3. Electrical Specifications
    • 3.1 Application
    • 3.2 Logical and Electrical State Relationships
    • 3.3 Driver Requirements
      • 3.3.1 Driver Types
      • 3.3.2 Driver Specifications
    • 3.4 Receiver Requirements
      • 3.4.1 Receiver Specifications, Allowed
      • 3.4.2 Receiver Specifications, Preferred
    • 3.5 Composite Device Load Requirements
      • 3.5.1 Resistive Termination
      • 3.5.2 Negative Voltage Clamping
      • 3.5.3 DC Load Requirements
      • 3.5.4 Capacity Load Limit
      • 3.5.5 Typical Circuit Configuration
    • 3.6 Ground Requirements
    • 3.7 Cable Characteristics
      • 3.7.1 Conductor Requirements
      • 3.7.2 Cable Construction
    • 3.8 State Transition Timing Values
  • 4. Mechanical Specifications
    • 4.1 Application
    • 4.2 Connector Type
      • 4.2.1 Electrical Considerations
      • 4.2.2 Mechanical Considerations
      • 4.2.3 Environmental Considerations
    • 4.3 Connector Contact Assignments
    • 4.4 Device Connector Mounting
    • 4.5 Cable Assembly
  • 5. System Applications and Guidelines for the Designer
    • 5.1 System Compatibility
    • 5.2 Data Rate Consideration
    • 5.3 Device Capabilities
      • 5.3.1 Busy Function
      • 5.3.2 NRFD Hold
      • 5.3.3 RL Applications
    • 5.4 AND and OR Logic Operations
      • 5.4.1 RFD and DAC Messages
      • 5.4.2 SRQ Message
      • 5.4.3 Circuit Implementations
    • 5.5 Address Assignment
    • 5.6 Typical Combinations of Interface Functions
    • 5.7 Unimplemented Interface Message Handling
  • 6. System Requirements and Guidelines for the User
    • 6.1 System Compatibility
    • 6.2 System Installation Requirements
      • 6.2.1 Maximum Number of Devices
      • 6.2.2 Minimum System Configurations
      • 6.2.3 System Controllers
      • 6.2.4 Devices Powered Off and On
    • 6.3 Address Assignment
      • 6.3.1 Primary Talk Addresses
      • 6.3.2 Primary Listen Addresses
      • 6.3.3 Secondary Addresses
    • 6.4 Cabling Restrictions
      • 6.4.1 Maximum Cable Length
      • 6.4.2 Distribution of Maximum Cable Lengths
      • 6.4.3 Cabling Configurations
    • 6.5 Operational Sequence Guidelines
      • 6.5.1 Data Transfer
      • 6.5.2 Serial Poll
      • 6.5.3 Control Passing
      • 6.5.4 Parallel Poll
      • 6.5.5 Placing Devices in Forced Remote Control
      • 6.5.6 Sending Interface Clear
  • Annex A Typical Instrument System
    • A.1 Event Sequence 1
    • A.2 Event Sequence 2 (Device Dependent Data Directed to Digital Printer)
  • Annex B Handshake Process Timing Sequence
    • B.1 General Comments
    • B.2 List of Events for Handshake Process
  • Annex C Interface Function Allowable Subsets
    • C.1 General Comments
    • C.2 Capability Identification Codes
    • C.3 SH Function Allowable Subsets
    • C.4 AH Function Allowable Subsets
    • C.5 T Function Allowable Subsets
    • C.6 T Function (with Address Extension) Allowable Subsets
    • C.7 L Function Allowable Subsets
    • C.8 L Function (with Address Extension) Allowable Subsets
    • C.9 SR Function Allowable Subsets
    • C.10 RL Function Allowable Subsets
    • C.11 PP Function Allowable Subsets
    • C.12 DC Function Allowable Subsets
    • C.13 DT Function Allowable Subsets
    • C.14 Function Allowable Subsets
  • Annex D Interface Message Reference List
  • Annex E Multiline Interface Messages: ISO Code Representation
  • Annex F Logic Circuit Implementation
    • F.1 Implementing States Which Require No Memory
    • F.2 Implementing States Which Require Memory
  • Annex G Parallel Polling Sequence
  • Annex H Description of Interface Parameters on Data Sheets
    • H.1 General
    • H.2 Description of Interface Function Capabilities
    • H.3 Electrical Driver/Receiver Capabilities
      • H.3.1 Signal lines with open collector drivers (everywhere there is a choice) use E1 (specify applicable DIO lines and Constraints)
      • H.3.2 Signal lines with three-state drivers (everywhere there is a choice) use E2 (specify applicable DIO lines and constraints)
    • H.4 Additional Information of Value to Systems Users and Designers
      • H.4.1 Functional Specifications
      • H.4.2 Controls, Connectors and Indicators
      • H.4.3 Power Up/Down Sequences and Default Values
      • H.4.4 Programmable Device Functions
      • H.4.5 Status Handling Information
    • H.5 Description of Typical Time Related Values
      • H.5.1 Data rates for DAB messages
      • H.5.2 Identify other time values relating to system performance
  • Annex I Address Switch Labeling and Interface Status Indicators
    • I.1 General Comments
    • I.2 Talk and Listen Addresses
    • I.3 DIP Switch
    • I.4 Alternate Implementations
    • I.5 Device Status Indicators
  • Annex J Recommended Methods for Reducing the Effects of Radiated and Conducted Interference for Devices Specified in this Standard
    • J.1 Reducing the Effect of Radiated Interference
      • J.1.1 Screened Cables
      • J.1.2 RF Connection Techniques
      • J.1.3 Connector Housing
      • J.1.4 EM Radiation Screening
    • J.2 Connectors Conforming to this Standard Used On Equipment
    • J.3 Reducing the Effects of Conducted Interference
      • J.3.1 Generation of Injected Signals on Signal Ground Lines
      • J.3.2 Protection Against Conducted EMI

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