Keithley 7001 User Manual

IEEE-488 Reference
5-91
5.14 Sense Subsystems
The Sense subsystems are used to read digital input ports. The :SENSe1 Subsystem is used to read the built-in digital input lines.
The :SENSe2 and :SENSe3 Subsystems are used to read the inputs of digital cards installed in slots 1 and 2 respectively.
Table 5-9
SENSe command summary
Command Description
:SENSe[1]
:TTL[1]
:DATA?
Command path to read internal input line.
Read internal digital input line.
:SENSe2
:DATA? <list>
Command path:
Read specified input channels for slot 1.
:SENSe3
:DATA? <list>
Command path:
Read specified input channels for slot 2.
Notes:
1. Brackets ([ ]) are used to denote optional character sets. These optional characters do not
have to be included in the program message. Do not use brackets ([ ]) in the program mes-
sage.
2. Angle brackets (< >) are used to indicate parameter type. Do not use angle brackets (< >) in
the program message.
3. Upper case characters indicate the short-form version for each command word.
4. At least one space is requred between a command word and the parameter.
:SENSe[1] Subsystem
:TTL[1]:DATA?
:SENSe[1]:TTL[1]:DATA? Read internal input port
:sens:ttl:data?
This command is used to read the single line of the digital input port. After sending this com-
mand and addressing the Model 7001 to talk, a value indicating the status of the port will be sent
to the computer.
A value of “1” indicates that the input port is high (ON), and a value of “0” indicates that the
port is low (OFF).
10 OUTPUT 707; “:sens:ttl:data?”
20 ENTER 707; A$
30 PRINT A$
40 END
Line 10 Read the input port.
Line 20 Addresses the 7001 to talk.
Line 30 Displays the status of the input port (0 or 1).
Short-form
formats
Description
Programming
example
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Keithley 7001 Specifications

General

Max Switching Voltage	300 V
Max Switching Current	1 A
Operating Temperature	0°C to 50°C
Switching Speed	1 ms
Interface	GPIB, RS-232
Switching Type	Various, depending on installed switch cards (e.g., electromechanical, solid-state)

Summary

Warranty

Limitation of Warranty

Limits of warranty coverage, remedies, and exclusions.

Safety Precautions

7001 High Density Switch System Specifications

SYSTEM

Core system parameters including capacity, memory, timing, triggers, and I/O.

ANALOG BACKPLANE

Details on analog backplane signals, voltage, current, and isolation.

IEEE-488 BUS IMPLEMENTATION

GENERAL

1 General Information

1.3 Warranty Information

Details and procedures related to product warranty.

1.5 Safety Symbols and Terms

Explanation of safety symbols and terms used throughout the manual.

1.6 Specifications

Technical specifications of the Model 7001 instrument.

2 Card Installation

2.2 Model 701X Series Card Installation

Steps for installing 701X series cards into the mainframe.

2.3 Non-701X Series Cards

Steps for installing non-701X series cards into the mainframe.

4 Front Panel Operation

4.2 Power-up Procedure

Steps for connecting power and starting the instrument.

4.5 Mainframe Programming

4.7 Card Config

4.8 Scan Config

5 IEEE-488 Reference

5.2 IEEE-488 Bus Connections

5.3 Primary Address Selection

5.6 Status Structure

7 Maintenance

7.2 Service Options

7.3 Static-Sensitive Devices

Precautions for handling static-sensitive components.

7.5 Disassembly

Procedures for removing instrument covers and boards.

7.6 Diagnostics

How to run the instrument's built-in diagnostic tests.

7.8 Troubleshooting

Guidance for diagnosing and fixing instrument malfunctions.

8 Replaceable Parts

8.2 Electrical Components List

8.4 Ordering Information

8.5 How to Obtain Factory Service

Process for returning the instrument for factory service.

6 Theory of Operation

6.2 Overall Functional Description

General functional overview of the Model 7001.

6.3 Control Function

Description of the instrument's internal control mechanisms.

6.4 Relay Control Circuitry