Measurement-computing Digital488 User Manual download pdf (Page 53)

Section 3 Command Descriptions

3.23

will generate a

Service Request

when the

Digital488

self-test fails.

Refer to the

Test

command

(T0)

description for details on self-tests.

M16

will generate a

Service Request

when the

Digital488

has completed the

execution of a set of commands from the bus controller. This is used by the

controller to assure the completion of a set of commands before sending a

subsequent set of commands.

Example:

CLEAR 718

reset the

Digital488

OUTPUT 718;"M4X"

select SRQ on Bus error

OUTPUT 718;"F7X"

send an invalid bus command.

Note: ERROR and SRQ LEDs should illuminate

CLEAR 718

reset the

Digital488

OUTPUT 718;"M1XM4X"

select SRQ on Bus error and SRQ on Service input.

OUTPUT 718;"M5X"

This has the same effect as the command above

where

M1X

plus

M4X

equals

M5X

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 82 83

Digital488 3
Digital488OEM 3
Instruction Manual 3
Table of Contents 5
Introduction 9
Section 1 Introduction 10
1.3 Specifications 11
&$87,21 12
Digital488/OEM Specifications 13
Digital I/O 13
IEEE 488 13
Getting Started 17
IEEE Address = 18 18
CR Only LF Only 19
EOI Enabled EOI Disabled 19
CR-LF LF-CR 19
210 20 30 40 50 20
4939199129 20
65 µS typ 50 µS typ 22
DCL, SDC or IFC 22
DATA VALID 23
15 µS min 23
50 µS typ† 23
† 15 µS typ in F5 Format 23
75 µS typ 50 µS typ 25
Command Descriptions 31
Serial Poll Status Byte 54
IEEE 488 Primer 61
Section 4 IEEE 488 Primer 63
4.3 SEND IT TO MY ADDRESS 64
4.4 BUS MANAGEMENT LINES 64
4.4.1 Attention (ATN) 64
4.4.2 Interface Clear (IFC) 65
4.4.3 Remote Enable (REN) 65
4.4.4 End or Identify (EOI) 65
4.4.5 Service Request (SRQ) 65
4.5 HANDSHAKE LINES 66
4.5.1 Data Valid (DAV) 66
4.6 DATA LINES 67
4.7 MULTILINE COMMANDS 67
4.7.1 Go To Local (GTL) 67
4.7.6 Local Lockout (LLO) 68
4.7.7 Device Clear (DCL) 68
4.8 MORE ON SERVICE REQUESTS 70
4.8.1 Serial Poll 71
4.8.2 Parallel Poll 71
Service Information 73

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Measurement-computing Digital488 User Manual Page 53

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