Remote Operation; 4.0. General; 4.1. Ieee-488 Interface; Ieee-488 Interface Settings - Lakeshore 647 User Manual

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Table Of Contents

Table of Contents

4.0. GENERAL

Either of two computer interfaces available for the Model 647 permit remote MPS operation: the IEEE-488

Interface (Paragraph 4.1) and the Serial Interface (Paragraph 4.2). Use only one of the interfaces at a time.

The two interfaces share a common set of commands described in Paragraph 4.3. For further information on

RS-485 Mainframe Control Bus Operation, see Appendix C.

4.1. IEEE-488 INTERFACE

The IEEE-488 Interface is an instrumentation bus with hardware and programming standards that simplify

instrument interfacing. The MPS IEEE-488 Interface complies with the IEEE-488.2-1987 standard and

incorporates the functional, electrical, and mechanical specifications of the standard unless otherwise

specified in this manual.

All instruments on the interface bus perform one or more interface function: TALKER, LISTENER, or BUS

CONTROLLER. A TALKER transmits data onto the bus to other devices. A LISTENER receives data from other

devices through the bus. The BUS CONTROLLER designates to the devices on the bus which function to

perform. The MPS performs the functions of TALKER and LISTENER but cannot be a BUS CONTROLLER.

The BUS CONTROLLER is the digital computer which tells the MPS which functions to perform.

Below are MPS IEEE-488 interface capabilities:

• SH1: Source handshake capability

• RL1: Complete remote/local capability

• DC1: Full device clear capability

• DT0: No device trigger capability

• C0: No system controller capability

• T5: Basic TALKER, serial poll capability, talk only, unaddressed to talk if addressed to listen

• L4: Basic LISTENER, unaddressed to listen if addressed to talk

4.1.1

Interface Settings

To use the IEEE-488 interface, the user must set the

IEEE Address and Terminators. Press Function

Menu, then press the key corresponding to SETUP to

display the Setup screen. Use the cursor keys to

move the arrow indicator to IEEE/SIO, then press

either of the Up or down Numeric Entry keys to display

the IEEE Interface screen.

IEEE ADD: 1 to 30

Use the cursor keys to move arrow indicator to IEEE

ADD. The Up or down Numeric Entry keys increment

or decrement the IEEE Address. The default value is

12. The range of choices is from 1 to 30.

TERMS: CR LF, LF CR, LF, DAB

Use the cursor keys to move the arrow indicator to TERM. The Up or down Numeric Entry keys cycle through

the following choices: (CR LF), (LF CR), (LF), (DAB). The default is Carriage Return and Line Feed (CR LF).

EOI: ON or OFF

Use the cursor keys to move the arrow indicator to EOI. The Up or down Numeric Entry keys toggle EOI On

or Off. The default is On. If turned on, End Or Identify is asserted during the last byte of a multibyte transfer.

BAUD: 300, 1200, 9600

Use the cursor keys to move the arrow indicator to BAUD. The Up or down Numeric Entry keys cycle through

the following baud rates for the RS-232 interface: 300, 1200, 9600.