Tektronix DMM4040, DMM4050 Programmer
DMM4040 and DMM4050
Digital Multimeter
077-0363-00
Programmer Manual
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix
or its subsidiaries or suppliers, and are protected by national copyright laws and international
treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in
this publication supersedes that in all previously published material. Specifications and price
change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix, Inc.
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
- In North America, call 1-800-833-9200.
- Worldwide, visit www.tektronix.com
to find contacts in your area.
Table of Contents
Title Page
Introduction....................................................................................................... 4
Safety Information............................................................................................. 4
Symbols and Terms....................................................................................... 5
Safety and Electrical Symbols ...................................................................... 5
Local and Remote Operation........................................................................ 5
Computer Interfaces...................................................................................... 6
Optimizing System Speed for I/O Operation .................................................... 6
Selecting the Remote Interface Port.................................................................. 8
Configuring the IEEE-488 Port......................................................................... 8
IEEE-488 Operating Limitations .................................................................. 8
Setting the IEEE-488 (GPIB) Port Address.................................................. 8
Capability Commands................................................................................... 9
Interconnections............................................................................................ 9
Configuring the RS-232 Port............................................................................. 10
Setting RS-232 Baud Rate............................................................................ 10
Setting RS-232 Parity and Data Bits............................................................. 11
Setting RS-232 Stop Bits.............................................................................. 11
Setting RS-232 Flow Control........................................................................ 11
Setting RS-232 End-Of-Line Character........................................................ 11
Enabling and Disabling Fluke 45 Emulation Echo....................................... 11
RS-232 Modes of Operation......................................................................... 12
Interconnections............................................................................................ 14
Configuring the Ethernet (LAN) Port ............................................................... 16
Setting the IP Address................................................................................... 16
Setting the LAN Subnet Mask...................................................................... 17
Reading the Domain Name........................................................................... 18
Configuring the Host Name.......................................................................... 18
Reading the MAC Address........................................................................... 18
Configuring the LAN Default Gateway........................................................ 18
Configuring the General Network Socket Port............................................. 19
Establishing an Ethernet Connection ................................................................ 19
Terminating an Ethernet Connection ................................................................ 21
Selecting the Programming Language .............................................................. 21
Getting Started With an Installation Test.......................................................... 21
Installation Test for RS-232 Connections..................................................... 21
Installation Test for IEEE-488 Connections................................................. 22
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If the Test Fails ............................................................................................. 22
How the Meter Processes Input......................................................................... 23
Input Strings.................................................................................................. 23
Input Terminators.......................................................................................... 23
Typical IEEE-488 Input Strings.................................................................... 24
Sending Numeric Values to the Meter.......................................................... 24
Sending Command Strings to the Meter....................................................... 24
How the Meter Processes Output...................................................................... 25
Triggering Input ................................................................................................ 26
Internal Triggering........................................................................................ 26
External Triggering....................................................................................... 27
Service Requests (IEEE-488 Only) and Status Registers.................................. 27
Standard Event Status and Standard Event Status Enable Registers ............ 28
Questionable Data Event Register and Questionable Data Enable Register. 29
Status Byte Register...................................................................................... 30
Reading the Status Byte Register.................................................................. 30
Service Request Enable Register .................................................................. 31
Supported SCPI Commands.............................................................................. 31
SCPI Command Summary............................................................................ 32
SCPI Command Details................................................................................ 41
Using the MEASure? Command .................................................................. 42
Using the CONFigure Command.................................................................. 43
Using the READ? Command........................................................................ 46
Using the INITiate Command....................................................................... 46
Using the FETCh? Command....................................................................... 46
Using the SENSe Subsystem to Configure the Meter................................... 47
Programming for Math Operations............................................................... 55
Programming the Trigger System................................................................. 59
Using System-Related Commands................................................................ 63
Using Status Reporting Commands.............................................................. 66
Calibration Commands ................................................................................. 68
Using RS-232/Ethernet Interface Commands............................................... 70
Command Terminators ................................................................................. 71
Alternate Programming Language Compatibility......................................... 72
FLUKE 45 Command Emulation Summary..................................................... 73
Computer Interface Command Set................................................................ 73
IEEE-488 Capabilities and Common Commands......................................... 73
Triggering Output ......................................................................................... 80
Using NI SignalExpress, Tektronix Edition...................................................... 81
FLUKE 8842A Emulation Mode...................................................................... 81
Example Notes.............................................................................................. 81
Device-Dependent Command Set................................................................. 84
Input Syntax.................................................................................................. 92
Output Data................................................................................................... 94
Service Requests........................................................................................... 96
Introduction....................................................................................................... 99
Introduction....................................................................................................... 107
Incompatible Fluke 45 Commands.................................................................... 107
Dual Functions.............................................................................................. 107
Reading Rates ............................................................................................... 108
Ranges........................................................................................................... 108
Introduction....................................................................................................... 109
Your Meter and Your Network Administrator.................................................. 109
Network Primer................................................................................................. 110
Physical Layer Wiring Schemes Supported by the Meter ............................ 110
ii
Contents (continued)
Network Interconnection Devices................................................................. 111
Basic Network Packet and Frame Contents.................................................. 111
IP Addresses and Segmented Networks........................................................ 112
TCP/IP Protocol Stack.................................................................................. 114
Introduction....................................................................................................... 117
Device Dependent Command Set...................................................................... 117
Calibration Commands...................................................................................... 117
Dn (Display Commands)................................................................................... 118
Gn (Get Commands) ......................................................................................... 118
Tn (Trigger Mode Commands)......................................................................... 118
Wn (Terminator Commands)............................................................................ 118
Numeric Entry Command ................................................................................. 118
Talk-Only Mode................................................................................................ 118
Ranging in 8842A Emulation Mode ................................................................. 118
Operational Differences .................................................................................... 119
Index
Appendices
A Error Codes................................................................................................ 95
B Fluke 45 Emulation Limitations ................................................................. 103
C Network Consideration............................................................................... 105
D Fluke 8842A Emulation Limitations .......................................................... 113
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iv
List of Tables
Table Title Page
1. IEEE-488 Compatibility Codes............................................................................. 9
2. Factory Settings of RS-232 Communications Parameters..................................... 10
3. Status Register Summary....................................................................................... 27
4. Description of Bits in ESR and ESE...................................................................... 28
5. Description of Bits in the Questionable Data Register.......................................... 29
6. Description of Bits in the Status Byte Register ..................................................... 30
7. CALibration Command Summary......................................................................... 32
8. CONFigure Command Summary.......................................................................... 32
9. IEEE-488.2 Common Command Summary.......................................................... 33
10. Math Command Summary..................................................................................... 33
11. MEASure Command Summary............................................................................. 34
12. Measurement configuration command summary .................................................. 35
13. RS-232 Interface Command Summary.................................................................. 38
14. Status Reporting Command Summary .................................................................. 39
15. System-Related Command Summary.................................................................... 40
16. Triggering Command Summary............................................................................ 41
17. Preset Conditions for the MEASure? and CONFigure Commands....................... 45
18. Allowed Math/Measurement Function Combinations........................................... 55
19. IEEE-488.2 Common Commands......................................................................... 73
20. Fluke 45 Function Commands and Queries........................................................... 75
21. Function Modifier Commands and Queries .......................................................... 76
22. Range and Measurement Rate Commands and Querie ......................................... 77
23. Measurement Queries............................................................................................ 78
24. Compare Commands and Queries......................................................................... 79
25. Trigger Configuration Commands......................................................................... 79
26. Miscellaneous Commands and Queries................................................................. 80
27. RS-232 Remote/Local Configuration Commands................................................. 80
28. Trigger Types ........................................................................................................ 81
29. 8842A Get Commands .......................................................................................... 86
30. Serial Poll Register................................................................................................ 97
31. Serial Poll Register Description............................................................................. 97
32. Execution Error Codes and Descriptions............................................................... 99
33. Ethernet/ IEEE-488 Configuration Errors ............................................................. 104
34. Calibration Errors .................................................................................................. 104
35. Non-compatible Fluke 45 Remote Commands...................................................... 107
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36. Fluke 45 Dual Function Compatibility Matrix...................................................... 108
37. IP Address Assignments........................................................................................ 112
38. 8842A Device Dependent Commands Not Supported .......................................... 117
39. DMM4040/4050 Commands the Fluke 8842A Doesn't Support........................... 117
40. Fluke 8842A Virtual Range Mapping ................................................................... 119
vi
List of Figures
Figure Title Page
1. RS-232 Pin-out and Cable Interconnect................................................................ 15
2. Typical IEEE-488 Input String.............................................................................. 25
3. Overview of Status Data Structure (DMM4040/4050 and Fluke 45).................... 28
4. DMM4040/4050 Triggering System ..................................................................... 60
5. Typical Command String for Fluke 8842A Emulation ......................................... 82
6. Fluke 8842A Emulation Device-Dependent Command Set.................................. 83
7. Fluke 8842A Emulation Data Output Format........................................................ 85
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viii
Remote Operation
Introduction..........................................................................................................0-4
Safety Information................................................................................................0-4
Symbols and Terms ..........................................................................................0-5
Safety and Electrical Symbols .........................................................................0-5
Local and Remote Operation................................................................................0-5
Computer Interfaces.............................................................................................0-6
Optimizing System Speed for I/O Operation .......................................................0-6
Selecting the Remote Interface Port.....................................................................0-8
Configuring the IEEE-488 Port............................................................................0-8
IEEE-488 Operating Limitations..........................................................................0-8
Setting the IEEE-488 (GPIB) Port Address .........................................................0-8
Capability Commands..........................................................................................0-9
Interconnections...................................................................................................0-9
Configuring the RS-232 Port................................................................................0-10
Setting RS-232 Baud Rate....................................................................................0-10
Setting RS-232 Parity and Data Bits....................................................................0-11
Setting RS-232 Stop Bits......................................................................................0-11
Setting RS-232 Flow Control...............................................................................0-11
Setting RS-232 End-Of-Line Character...............................................................0-11
Enabling and Disabling Fluke 45 Emulation Echo ..............................................0-11
RS-232 Modes of Operation ................................................................................0-12
DMM4040/4050 Mode ........................................................................................0-12
Selecting Between Computer and Terminal Mode ..............................................0-12
Fluke 45 Mode .....................................................................................................0-12
Interconnections...................................................................................................0-14
Fluke 8842A Emulation Mode.............................................................................0-14
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Programmer Manual
Configuring the Ethernet (LAN) Port
Error! Bookmark not defined.-Error! Bookmark not defined.
Setting the IP Address..........................................................................................0-16
Selecting Dynamic Host Configuration Protocol (DHCP)...................................0-16
Setting a Static Internet Address ..........................................................................0-17
Setting the LAN Subnet Mask..............................................................................0-17
Reading the Domain Name..................................................................................0-18
Configuring the Host Name .................................................................................0-18
Reading the MAC Address ..................................................................................0-18
Configuring the LAN Default Gateway...............................................................0-18
Configuring the General Network Socket Port ....................................................0-19
Establishing an Ethernet Connection ...................................................................0-19
Terminating an Ethernet Connection ...................................................................0-21
Selecting the Programming Language .................................................................0-21
Getting Started With an Installation Test.............................................................0-21
Installation Test for RS-232 Connections ............................................................0-21
Installation Test for IEEE-488 Connections ........................................................0-22
If the Test Fails.....................................................................................................0-22
How the Meter Processes Input............................................................................0-23
Input Strings.........................................................................................................0-23
Input Terminators.................................................................................................0-23
Typical IEEE-488 Input Strings...........................................................................0-24
Sending Numeric Values to the Meter.................................................................0-24
Sending Command Strings to the Meter ..............................................................0-24
How the Meter Processes Output.........................................................................0-25
Triggering Input ...................................................................................................0-26
Internal Triggering ...............................................................................................0-26
External Triggering..............................................................................................0-27
Service Requests (IEEE-488 Only) and Status Registers.....................................0-27
Standard Event Status and Standard Event Status Enable Registers....................0-28
Questionable Data Event Register and Questionable Data Enable Register........0-29
Status Byte Register.............................................................................................0-30
Reading the Status Byte Register.........................................................................0-30
Service Request Enable Register..........................................................................0-31
Supported SCPI Commands.................................................................................0-31
SCPI Command Summary ...................................................................................0-32
SCPI Command Details .......................................................................................0-41
Using the MEASure? Command..........................................................................0-42
Using the CONFigure Command.........................................................................0-43
Setting Range and Resolution Parameters............................................................0-46
Using the READ? Command...............................................................................0-46
Using the INITiate Command..............................................................................0-46
Using the FETCh? Command..............................................................................0-46
Using the SENSe Subsystem to Configure the Meter..........................................0-47
Programming for Math Operations ......................................................................0-55
Programming the Trigger System ........................................................................0-59
Using the Triggering Commands .........................................................................0-60
Using System-Related Commands.......................................................................0-63
Using Status Reporting Commands .....................................................................0-66
Calibration Commands.........................................................................................0-68
Using RS-232/Ethernet Interface Commands......................................................0-70
Command Terminators.........................................................................................0-71
SCPI Parameter Types .........................................................................................0-71
Numeric Parameters.............................................................................................0-71
Discrete Parameters..............................................................................................0-72
2
Digital Multimeter
Introduction
Boolean Parameters..............................................................................................0-72
String Parameters .................................................................................................0-72
Alternate Programming Language Compatibility................................................0-72
FLUKE 45 Command Emulation Summary........................................................0-73
Computer Interface Command Set.......................................................................0-73
IEEE-488 Capabilities and Common Commands................................................0-73
Function Commands and Queries ........................................................................0-75
Function Modifier Commands and Queries.........................................................0-76
Range and Measurement Rate Commands and Queries.......................................0-77
Measurement Queries...........................................................................................0-78
Compare Commands and Queries........................................................................0-79
Trigger Configuration Commands .......................................................................0-79
Miscellaneous Commands and Queries ...............................................................0-80
RS-232 Remote/Local Configurations.................................................................0-80
Triggering Output.................................................................................................0-80
Setting the Trigger Type Configuration...............................................................0-80
External Triggering..............................................................................................0-81
Using NI SignalExpress, Tektronix Edition.........................................................0-81
FLUKE 8842A Emulation Mode.........................................................................0-81
Example Notes .....................................................................................................0-81
Device-Dependent Command Set........................................................................0-84
Bn (Offset Commands) ........................................................................................0-84
Dn (Display Commands)......................................................................................0-84
Fn (Function Commands).....................................................................................0-84
Get Commands.....................................................................................................0-84
G0 (Get Instrument Configuration)......................................................................0-86
G1 (Get SRQ Mask).............................................................................................0-87
G3 (Get User-Defined Message)..........................................................................0-87
G4 (Get Calibration Status)..................................................................................0-87
G5 (Get IAB Status).............................................................................................0-87
G6 (Get YW Status).............................................................................................0-88
G7 (Get Error Status) ...........................................................................................0-88
G8 (Get Instrument Identification).......................................................................0-88
N (Numeric Entry Command)..............................................................................0-89
Put Commands .....................................................................................................0-89
P0 (Put Instrument Configuration).......................................................................0-89
P1 (Put SRQ Mask)..............................................................................................0-90
Rn (Range Commands)........................................................................................0-90
Sn (Reading Rate Commands).............................................................................0-90
Tn (Trigger Mode Commands)............................................................................0-90
Wn (Terminator Commands) ...............................................................................0-91
X0 (Clear Error Register Command) ...................................................................0-91
Yn (Suffix Commands)........................................................................................0-91
Z0 (Self-Test Command) .....................................................................................0-91
Device Clear Command .......................................................................................0-91
? (Single-Trigger Command) ...............................................................................0-92
Input Syntax .........................................................................................................0-92
Definitions 0-92
Input Processing...................................................................................................0-92
Syntax Rules 0-93
Output Data..........................................................................................................0-94
Loading Output Data............................................................................................0-94
Types of Output Data...........................................................................................0-95
Numeric Data and Error Messages.......................................................................0-95
Overrange Indication............................................................................................0-95
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Programmer Manual
Error Messages.....................................................................................................0-95
Status Data 0-96
Output Priority......................................................................................................0-96
Service Requests ..................................................................................................0-96
The SRQ Mask.....................................................................................................0-98
Introduction..........................................................................................................A-99
Introduction..........................................................................................................B-107
Incompatible Fluke 45 Commands.......................................................................B-107
Dual Functions .....................................................................................................2-107
Reading Rates.......................................................................................................2-108
Ranges 2-108
Introduction..........................................................................................................C-109
Your Meter and Your Network Administrator.....................................................C-109
Network Primer....................................................................................................C-110
Physical Layer Wiring Schemes Supported by the Meter....................................C-110
Network Interconnection Devices........................................................................C-111
Basic Network Packet and Frame Contents .........................................................C-111
IP Addresses and Segmented Networks ...............................................................C-112
TCP/IP Protocol Stack .........................................................................................3-114
Introduction..........................................................................................................D-117
Device Dependent Command Set.........................................................................D-117
Calibration Commands.........................................................................................4-117
Dn (Display Commands)......................................................................................4-118
Gn (Get Commands) ............................................................................................4-118
Tn (Trigger Mode Commands)............................................................................4-118
Wn (Terminator Commands)...............................................................................4-118
Numeric Entry Command ....................................................................................4-118
Talk-Only Mode...................................................................................................4-118
Ranging in 8842A Emulation Mode ....................................................................4-118
Operational Differences .......................................................................................4-119
Introduction
Remote operation of the DMM4040 or 4050 Digital Multimeter (hereafter “the Meter”)
from a host, that is, a terminal, controller, PC, or computer, is accomplished by sending
commands to it through one of its remote interfaces. This manual describes how to setup,
configure, and operate the Meter through each of the remote interfaces.
The Meter is controlled remotely using either Standard Commands for Programmable
Instruments (SCPI), Fluke 45 or Fluke 8842A (8840A and 8842A) commands. Detailed
information on the SCPI command set, and how the Meter processes those commands is
included in this manual. Fluke 45 command limitations are covered in Appendix B and
Fluke 8842A command limitations are covered in Appendix D in this manual.
For more information regarding the SCPI programming language, visit
http://www.scpiconsortium.org
found at http://www.scpiconsortium.org/SCPI-99.pdf.
The level of detail in this chapter is based on the assumption that the reader is familiar
with the basics of data communication interface, and the IEEE-488 bus.
Safety Information
This section addresses safety considerations and describes symbols that may appear on
the Meter or in the manual.
Note
. A free copy of the SCPI standard can be
4
Digital Multimeter
Safety Information
Symbols and Terms
The following terms and safety and electrical symbols may appear in the manual or on
the product:
A XW Warning statement identifies conditions or practices that could result in injury
or death.
A W Caution statement identifies conditions or practices that could result in damage to
the Meter or equipment to which it is connected.
XW Warning
To avoid electric shock, personal injury, or death, carefully read
the information in the DMM4040 and DMM4050 User Manual
under “General Safety Summary” before attempting to install,
use, or service the Meter.
Safety and Electrical Symbols
Symbol Description Symbol Description
W
X
Risk of danger. Important
information. See manual.
Hazardous voltage. Voltage > 30 V
dc or ac peak might be present.
Π Display ON / OFF and Meter reset.
J Earth ground
B AC (Alternating Current) E Capacitance
F DC (Direct Current) G Diode
D
or
AC or DC (Alternating or Direct
Current)
I Fuse
C
R
Continuity test or continuity beeper
tone
Ψ
Digital signal
Y Potentially hazardous voltage U Maintenance or Service
T Double insulated h
Measurement Category II is for
CAT II
measurements performed on
circuits directly connected to the
low voltage installation.
CAT I
Static awareness. Static discharge
can damage parts.
Measurement Category I is for
measurements not directly
connected to mains.
Local and Remote Operation
When the Meter is operated from a host, it is said to be operated remotely. When operated
from the front panel, it is said to be operated locally.
Most operations that can be performed locally can also be performed remotely over the
remote interface. Some operations, like setting communications parameters for the
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DMM4040/4050
Programmer Manual
Computer Interfaces
RS-232 interface, and addressing the Meter for IEEE-488 operations can only be set
through the front panel.
XW Warning
To avoid electric shock, turn off the signal source to the Meter
before touching the test leads. The front panel display may not
indicate the true input voltage while in remote mode. Always
assume lethal voltages exist on the front-panel inputs.
Both the DMM4040 and 4050 Multimeters come equipped with an RS-232, Ethernet, and
IEEE-488 interface. Only one remote interface can be enabled at a time. Using any of the
interfaces turns the Meter into a fully programmable instrument that can be integrated
into an automated instrumentation system. For a PC with only USB ports, Tektronix
provides a cable (Tektronix PN 174-5813-00) that converts between USB and RS-232
ports.
Note
The remote interface port and settings can be changed only through the
Meter’s front-panel controls.
Enabling or selecting a port for remote operation is a separate process from setting the
various parameters associated with a remote interface. An interface does not have to be
selected to set its parameters; for example, the baud rate of the RS-232 port can be set
while the Meter has the LAN port enabled as the remote control port.
Optimizing System Speed for I/O Operation
Several factors affect the remote system speed of the DMM4040/4050. To make the
fastest measurements, it is best to store the measurements in internal memory before
transferring across the I/O bus. This is particularly true if you want to collect a large
number of samples per measurement. Set up all of the parameters (i.e. function, range,
filters, etc...) prior to taking the measurements. Use the internal trigger. Set the trigger
delay to zero. Turn off the display. If operating with RS-232, use the fastest baud rate
available.
One example of taking fast voltage readings is:
*cls # This clears all error prior to initiating readings
conf:volt:dc 0.1 # Set the DC range to manual and 100 mV.
volt:dc:nplc 0.02 # Set the NPLC to faster reading rate 4 1/2 digits.
zero:auto 0 # Turn Autozero off.
trig:sour imm # Set immediate trigger.
trig:del 0 # Set trigger delay to zero.
6
trig:coun 1 # Set trigger count to one or specify a larger number.
disp off # Turn display off. This may slightly improve reading rate.
syst:rem # Put the DMM4050 in remote. Only needed for RS-232 or
Ethernet #(required for READ? or MEAS?)
samp:coun 100 # Set the sample count from 1 to 5000.
Digital Multimeter
Optimizing System Speed for I/O Operation
:INIT; *OPC? # "*OPC?" returns 1 indicating that the measurements have been
taken and are ready to be transferred to the computer using the
FETCH? command.
:FETCH?
Note
For any sample count greater than 1, measurements are returned comma
separated.
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DMM4040/4050
Programmer Manual
Selecting the Remote Interface Port
Configuring the IEEE-488 Port
To enable or select a port for remote control of the Meter:
1. Press I.
2. Press PORT IF.
3. Press SELECT PORT.
4. Press the soft key labeled with the desired port: RS 232C, IEEE488, or LAN.
Port selection is non-volatile. Therefore, the selected port will remain active until another
port is selected through the front panel.
The IEEE-488 interface is designed in compliance with supplemental standard IEEE-
488.2. Devices connected to the bus in a system are designated as talkers, listeners,
talker/listeners, or controllers. The connector for connecting the Meter to the IEEE-488
bus is located on the rear panel. Under control of an instrument controller, the Meter
operates exclusively as a talker/listener on the IEEE-488 bus.
The Meter conforms to the Standard Specification IEEE-488.1 – 1987: IEEE Standard
Digital Interface for Programmable Instrumentation, and to IEEE-488.2 - 2004: Codes,
Formats, Protocols, and Common Commands.
IEEE-488 Operating Limitations
The following limitations govern the IEEE-488 remote interface:
• A maximum of 15 instruments may be connected in a single IEEE-488 bus system.
• The maximum length of IEEE-488 cable used on a single IEEE-488 system must be the
lesser of 20 meters, or 2 meters times the number of devices in the system.
Setting the IEEE-488 (GPIB) Port Address
Before the Meter will accept commands through the IEEE-488 remote interface, IEEE488 must first be enabled or selected as the active interface port. This can only be done
through the Meter’s front panel.
A controller uses an address between 1 and 32 to identify a specific instrument on the
bus. The Meter is shipped from the factory with the IEEE-488 port address set to 1. To
change the IEEE-488 address:
1. Press I.
2. Press PORT IF.
3. Press IEEE488.
4. Use the soft keys to set the address as follows.
Select the address digit to adjust by pressing either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
8
5. With the desired address set, press ENTER.
Digital Multimeter
Configuring the IEEE-488 Port
Capability Commands
To conform to the IEEE-488.1 standard specification, it is not essential for a device to
encompass the full range of bus capabilities. The IEEE-488.1 document describes and
codes the standard bus features, so that manufacturers may give brief coded descriptions
of their own interfaces’ overall capability.
The codes that apply to the Meter are given in Table 1 below, together with short
descriptions. These codes conform to IEEE-488.2 requirements.
Appendix C of the IEEE-488.1 document contains a complete description of each code.
Table 1. IEEE-488 Compatibility Codes
IEEE-488 Subset Interface Functions
SH1 Source Handshake Capability
AH1 Acceptor Handshake Capability
T5 Talker (basic talker, serial poll, unaddressed to talk if addressed to listen)
L4 Listener (basic listener, unaddressed to listen if addressed to talk)
SR1 Service Request Capability
RL1 Remote/Local Capability (includes local lockout)
PP0 No Parallel Poll Capability
DC1 Device Clear Capability
DT1 Device Trigger – Supports group trigger (GET).
C0 No Controller Capability
E2 Open-Collector and Three-State Drivers
Interconnections
Instruments fitted with an IEEE-488 interface communicate with each other through a
standard set of interconnecting cables, as specified in the IEEE-488.1 Standard
document.
The IEEE-488 interface connector is located on the Meter’s rear panel.
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DMM4040/4050
Programmer Manual
Configuring the RS-232 Port
The RS-232 Communication Interface allows ASCII, asynchronous, serial
communication between the Meter and a host or terminal. The following sections
describe the process of configuring the RS-232 port. To make the RS-232 port the active
port for remote operation, see the “Selecting the Remote Interface Port” section above.
Table 2 lists the RS-232 parameter settings when the Meter leaves the factory.
Table 2. Factory Settings of RS-232 Communications Parameters
Parameter Factory Setting
Baud Rate 9600
Parity None (Parity bit 0)
Number of Data Bits 8 (7 data bits plus 1 parity bit)
Number of Stop Bits 1
Flow Control None
To access the RS-232 setup menu:
1. Press I.
2. Press the PORT IF soft key.
3. Press the RS 232C soft key.
At this point, all the RS-232 settings are made available.
All RS-232 port parameter settings are non-volatile and remain set until
changed.
Setting RS-232 Baud Rate
To set the baud rate:
1. With the RS-232 set up menu displayed, press BAUD RATE.
There are eight pre-defined settings: 1200, 2400, 4800, 9600, 19200 38400, 57600,
115200, and 230400. These selections are displayed in two separate menus. When
first entering baud rate selection, baud rates 9600 to 1200 are displayed. To get to the
next five higher baud rates, press MORE. To get back to the lower baud rates, press
B.
2. With the desired baud rate displayed, press the soft key under the chosen baud rate.
Note
10
Digital Multimeter
Configuring the RS-232 Port
Setting RS-232 Parity and Data Bits
To set the data bits:
1. With the RS-232 set up menu displayed, press PARITY DATA BIT.
2. Press the soft key under the desired parity, and data bit parameter.
NONE 8B DATA = No parity with 8 data bits
ODD 7B DATA = Odd parity with 7 data bits
EVEN 7B DATA = Even parity with 7 data bits
Setting RS-232 Stop Bits
To set the stop bits:
1. With the RS-232 set up menu displayed, press PARITY DATA BIT.
2. Press the soft key labeled 2 STOP BITS to toggle between 1 and 2 stop bits.
Note
When 2 STOP BITS is highlighted, the interface is configured to use 2 stop
bits.
Setting RS-232 Flow Control
To set flow control:
1. With the RS-232 set up menu displayed, press FLOW CONTROL.
2. Press the soft key under the desired flow control.
NONE = No flow control
XON = Software flow control Xon (hex 11) and Xoff (hex 13)
RTS = Hardware flow control, RTS/CTS
Setting RS-232 End-Of-Line Character
To set the End-Of-Line (EOL) character:
1. With the RS-232 set up menu displayed, press EOL.
2. Press the soft key labeled with the desired End-Of-Line character(s).
CR = Carriage return only
LF = Line Feed only
CR LF = Carriage Return and Line Feed
Setting the EOL character(s) in RS-232 also sets the same EOL
character(s) for Ethernet operation.
Note
Enabling and Disabling Fluke 45 Emulation Echo
Although you can turn echo on or off at anytime, the selection is only used or changed
when the Meter’s command mode is set to Fluke 45 emulation.
To enable or disable Echo for the RS-232 port:
1. With the RS-232 set up menu displayed, press COMP/TERM ECHO.
2. Press either the ECHO or NO ECHO soft key.
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DMM4040/4050
Programmer Manual
RS-232 Modes of Operation
DMM4040/4050 Mode
RS-232 communication is slightly different between the DMM4040/4050 and the Fluke
45 emulation modes. Switching between these two command languages is covered in the
“Selecting the Programming Language” section later in this manual. The following
sections explain the differences in communications protocol and how to set the Meter and
computer parameters for proper operation.
There are two modes of RS-232 operation when the Meter has the DMM4040 or 4050
command set selected: TERMINAL and COMPUTER. The terminal mode is an
interactive mode where an operator inputs commands, with immediate returns for
requested information (queries) and interface messages. In terminal mode, characters sent
to the Meter are echoed on the host’s display screen and a command prompt (for example
3>) is returned after the CR/LF is entered by the terminal. If you send a character to the
Meter over the RS-232 interface, pressing the <DELETE> or <BACKSPACE> key
deletes the previous character. A backspace is echoed to the host terminal.
Note
^C (CNTRL C) is the RS-232 equivalent of IEEE-488 DCI (device clear),
causing “1>” followed by a carriage return and line feed to be output.
The computer mode is used when the Meter is operated by computer program. In this
mode, requested information is returned by query, and interface messages are queued and
returned by command. Characters are not echoed on the host computer and command
prompts are suppressed. The <DELETE> or <BACKSPACE> keys are ignored.
Selecting Between Computer and Terminal Mode
Although you can select between Computer and Terminal mode at any time, the selection
is only used or changed when the Meter’s command mode is set to DMM4040/4050.
To select computer or terminal mode from the front panel:
1. Press I and then PORT IF.
Note
If the RS-232 port is not already highlighted, press SELECT PORT and
then RS 232C.
2. Press either RS 232C, COMP/TERM ECHO and select either COMPUTER or
TERMINAL.
Fluke 45 Mode
In the Fluke 45 Command emulation mode, there are two modes of RS-232 operation:
ECHO or NO ECHO. In Echo mode, characters sent to the Meter are echoed on the
host’s display screen. In No Echo mode, characters sent are not echoed.
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To set the echo parameter, refer to the "Enabling and Disabling RS-232 Echo" section
earlier in this manual. If you send a character to the Meter over the RS-232 interface,
pressing the <DELETE> or <BACKSPACE> key deletes the previous character. A
backspace is echoed to the display screen if Echo On mode is set.
In either mode, when the host sends a command to the Meter over the RS-232 interface,
the Meter parses and executes the command, and returns a response if appropriate, and
sends one of three prompts:
Digital Multimeter
Configuring the RS-232 Port
=> No errors were detected and the command was successfully parsed and
executed.
?> A Command Error was detected. The command was not executed because it
was not understood. For instance, this prompt would be returned if the Meter
was sent an input string that contained a syntax error.
!> An Execution Error was detected. The command was understood but not
executed (i.e., a device-dependent error). For instance, this prompt would be
returned if you attempted to use the decibels modifier (dB) on a frequency
measurement (FREQ).
Note
^C (CNTRL C) is the RS-232 equivalent of IEEE-488 DCI (device clear),
causing "=>" followed by a carriage return and line feed to be output.
Terminations for the end of line can be set to carriage return (CR), line feed (LF), or both
(CRLF). Terminations for the end of line can be set in the <Instr SETUP><PORT
IF><RS232C> selection.
To change the Meter to Fluke 45 Emulation Mode, setup the remote interface for RS-232
or IEEE-488 (Fluke 45 mode will not work over Ethernet):
For RS-232
1. Press I
2. Press PORT IF softkey.
3. Press the SELECT PORT softkey.
4. Press the RS 232C softkey.
Set the baud rate to 9600 as follows:
1. Press I
2. Press PORT IF softkey.
3. Press the RS 232C softkey.
4. Press the BAUD RATE softkey.
5. Press the 9600 softkey.
Set the RS-232 port to non-echo as follows:
1. Press I
2. Press PORT IF softkey.
3. Press the RS 232C softkey.
4. Press the COMP/TERM ECHO softkey.
5. Press the NO ECHO softkey.
For IEEE-488
1. Press I
2. Press PORT IF softkey.
3.
Press the SELECT PORT softkey.
4. Press the IEEE488 softkey.
Set the IEEE-488 address to a system compatible value as follows:
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DMM4040/4050
Programmer Manual
Interconnections
1. Press I
2. Press PORT IF softkey.
3. Press the IEEE488 softkey.
4. Use the soft keys to set the address as follows.
Select the address digit to adjust by pressing either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the character.
5. With the desired address set, press ENTER.
To set the Meter to Fluke 45 emulation:
1. Press I
2. Press the COMMANDS softkey.
3. Press the FLUKE 45 softkey.
The Meter communicates with a host through a DB-9 interface connector on the rear
panel of the Meter. Connect the Meter to the host or terminal using a cable appropriate to
your application that is less than 50 feet (15 meters) long. Longer cables are permitted,
providing that the load capacitance measured at the interface point (including the signal
terminator) does not exceed 2500 picofarads.
Figure Error! Reference source not found. shows the pin-out of the Meter’s RS-232
port, and two possible cable connections for communicating with a PC.
Fluke 8842A Emulation Mode
The Fluke 8842A emulation mode is only available when the Meter has the IEEE-488
port selected. To change the Meter to Fluke 8842A Emulation Mode, setup the remote
interface for IEEE-488 (Fluke 8842A emulation mode will not work over RS-232 or
Ethernet):
1. Press I
2. Press PORT IF softkey.
3. Press the SELECT PORT softkey.
4. Press the IEEE488 softkey.
Set the IEEE-488 address to a system compatible value as follows:
1. Press I
2. Press PORT IF softkey.
3. Press the IEEE488 softkey.
4. Use the softkeys to set the address as follows.
Select the address digit to adjust by pressing either <-- or
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the character.
-->.
14
5. With the desired address set, press ENTER.
Digital Multimeter
Configuring the RS-232 Port
To set the Meter to Fluke 8842A emulation:
1. Press I.
2. Press the COMMANDS softkey.
3. Press the 8842 softkey.
4040/4050 Cable (Null Modem such as Fluke RS43) PC
Not Used
RxData
TxData
Not Used
GND
Not Used
RTS
CTS
Not Used
4040/4050
Not Used
RxData
TxData
Not Used
GND
Not Used
RTS
CTS
Not Used
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
No Connect
RxData
TxData
DTR
GND
DSR
RTS
CTS
No Connect
Cable (USB to RS-232 such as Tektronix 174-5813-00) PC
No Connect
RxData
TxData
DTR
GND
DSR
RTS
CTS
No Connect
1
2
3
4
5
6
7
8
9
1
2
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9
1
2
3
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5
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7
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DCD
RxData
TxData
DTR
GND
DSR
RTS
CTS
RI
USB
Adapter
1
2
3
4
5
6
7
8
9
DCD
RxData
TxData
DTR
GND
DSR
RTS
CTS
RI
USB
Interface
Keys
DCD
RxData
TxData
DTR
GND
Data Carrier Detect
-
Receive Data
-
Transmit Data
-
Data Terminal Ready
-
Circuit Ground
DSR
RTS
CTS
RI
-
Data Set Ready
-
Request to Send
-
Clear to Send
-
Ring Indicator
gdb058.eps
Figure 1. RS-232 Pin-out and Cable Interconnect
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DMM4040/4050
Programmer Manual
Configuring the Ethernet (LAN) Port
The Meter can be remotely controlled through the LAN port on the Meter’s rear panel.
To select the LAN port as the remote control port, see the “Selecting the Remote
Interface” section above.
Configuring the LAN port is accomplished through the Instrument Setup function. The
selectable LAN port parameters are: DHCP (Dynamic Host Configuration Protocol), IP
Address, Net mask, Host Name, Mac Address, Gateway, Port number, and Domain.
When setting IP addresses, subnet masks, and default gateways on the Meter, keep in
mind they are stored as 32-bit binary numbers and expressed as four 3-digit segments in
dot-notation form. For example, xxx.xxx.xxx.xxx, where xxx is a byte value, is stored as
a 32-bit binary number.
To set the LAN port parameters:
1. Press I.
2. Press the PORT IF soft key.
3. Press the LAN soft key.
Note
When addressing some LAN addresses, computers will often interpret 0's in
the IP address as OCTAL values. As an example, if you configure your IP
address from the front panel as 129.196.017.023 and then attempt to
establish a connection to the meter, you should connect using the IP
address 129.196.17.23. Attempting to establish a connection to
129.196.017.023 may result in a connection request to 129.196.15.19.
Setting the IP Address
An internet (IP) address is required for all internet and TCP/IP communications. If DHCP
is enabled, the Meter will use the dynamic address supplied by the DHCP server.
However, if the DHCP server fails to supply the address, or DHCP is disabled, the
currently configured static IP address will be used.
Selecting Dynamic Host Configuration Protocol (DHCP)
Dynamic Host Configuration Protocol (DHCP) is a client-server protocol that eliminates
having to manually set permanent/static IP addresses. The DHCP server provides
configuration parameters (dynamic IP address, subnet mask, and default gateway IP
addresses) which are required for a client to participate in an IP network.
Using DHCP is the easiest way to configure the Meter for remote communication
through the LAN interface. DHCP is enabled when the Meter is shipped from the factory.
When connected to a network, and the LAN port is enabled, the Meter will try and
retrieve the parameters from a DHCP server necessary for communications. If the
parameters can’t be obtained, the Meter switches to the parameters that were manually
entered into the Meter.
16
To disable or enable DHCP on the Meter:
From the PORT IF menu, press LAN. If DHCP is already enabled, then DHCP will
be highlighted in the display. Pressing DHCP will toggle between enabled and disabled.
Digital Multimeter
Configuring the Ethernet (LAN) Port
Note
After changing any Ethernet setting (except the socket port), the Meter must
be powered off and on again, using the rear-panel power switch, to make
the change active.
Setting a Static Internet Address
The Meter comes from the factory with 000.000.000.000 in the static IP address register.
Note
If you are planning to use the Meter on a corporate LAN and do not wish to
use DHCP, contact your network administrator for a static IP address to be
used exclusively by your Meter. DHCP must be disabled to set a static IP
address.
To change the Meter’s static IP Address:
1. From the LAN Port setup menu, press the IP_ADDR soft key.
2. Use the soft keys to set the IP Address as follows:
To select the address character to adjust, press either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
3. Press the ENTER soft key.
The IP address is stored in non-volatile memory, and does not change when
power is removed and reapplied to the Meter or when the Meter receives an
*RST command.
Setting the LAN Subnet Mask
If communication between the host computer and the Meter passes through a router or
gateway, and DHCP is disabled, you must set the subnet mask and default gateway
address on both the host computer and the Meter. Get the correct subnet mask and
gateway address from your network administrator.
The LAN Subnet Mask is a 32-bit number. This number is represented as four 3-digit
segment numbers on the front-panel display. The default subnet mask set at the factory is
255.255.254.0.
To change the Meter’s subnet mask:
1. From the LAN Port setup menu, press the NETMASK soft key.
2. Use the soft keys to set the subnet mask as follows:
To select the mask character to adjust, press either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
Note
3. Press the ENTER soft key.
The new Subnet Mask will not take effect until the Meter has been powered down and
back up again using the rear-panel power switch.
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DMM4040/4050
Programmer Manual
Reading the Domain Name
Configuring the Host Name
The Domain Name is supplied by the DHCP server and cannot be changed. To read the
domain name:
1. From the LAN Port setup menu, press MORE.
2. Press the DOMAIN soft key.
3. Press B to return to the LAN Port setup menu.
The Host Name is the host portion of the domain name, which is translated into an IP
address. The Meter’s default host name is “test1”.
To change the Host Name:
1. From the LAN Port setup menu, press the HOSTNAME soft key.
2. Use the soft keys to set the Host Name as follows:
To select the character to adjust, press either <-- or -->.
With the desired character selected, press the soft key labeled -- to decrement the
character or ++ to increment the character.
3. Press the ENTER soft key.
The new Host Name will not take effect until the Meter has been powered down and back
up again using the rear-panel power switch.
Reading the MAC Address
The MAC Address is set at the factory and cannot be changed. To read the MAC
Address:
1. From the LAN Port setup menu, press MORE.
2. Press the MAC_ADDR soft key.
3. Press B to return to the LAN Port setup menu.
Configuring the LAN Default Gateway
The default gateway IP address is the IP address of a gateway (router) attached to the
same network as the device. When the instrument detects that a host computer is not on
the same network (using the network number), the data is sent through the gateway to
reach the host computer.
The default for the Meter is “0” (no gateway, and subnetting is not being used).
To set the LAN Default Gateway address:
1. From the LAN Port setup menu, press MORE.
2. Press GATEWAY.
18
3. To select the digit to adjust, press either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
4. Press the ENTER soft key.
Digital Multimeter
The new gateway address will not take effect until the Meter has been powered down and
back up again using the rear-panel power switch.
Configuring the General Network Socket Port
In order to communicate with each other, a host computer and the Meter must use the
same socket port number. The default port is 3490. Typically, the default port does not
need to be changed. If the socket port must be changed, enter the Socket Port number
supplied by your network administrator.
To change the Socket Port number:
1. From the LAN Port setup menu, press the MORE soft key.
2. Press the PORT # soft key.
3. To select the digit to adjust, press either <-- or -->.
With the desired digit selected, press the soft key labeled -- to decrement the digit
or ++ to increment the digit.
4. Press the ENTER soft key.
The new Network Socket Port becomes effective immediately.
Establishing an Ethernet Connection
Note
The Network Socket Port Number is stored in non-volatile memory.
Establishing an Ethernet Connection
The easiest method of establishing an Ethernet connection with the Meter is through the
commonly available program: Telnet. Telnet is a client-server protocol, based on TCP.
The Telnet Protocol provides a fairly general, bi-directional, eight-bit byte oriented
communications facility. Telnet is available on all UNIX servers and on most PCs.
Telnet clients typically connect to hosts on socket port 23. The LAN connection to the
Meter must be established using the specified Network Socket Port. See the “Configuring
the General Network Socket Port” section above. When the remote interface port is
changed to LAN from the Meter’s front panel, a LAN server is initiated in the Meter
which listens for client connections on the socket port at the specified IP address.
To establish a LAN connection to the Meter from a computer using either UNIX,
LINUX, or MS-DOS command prompts, perform the following procedure:
1. On the Meter’s front panel, change the remote interface port to LAN
2. At the command prompt on the client computer, enter:
telnet <IP Address> <Socket Port>
Alternatively, if you are using DHCP and would like to connect using the host name
rather than the IP address, from the computer command prompt enter:
telnet <Domain Name> <Socket Port>
As an example, if you know the IP address is 129.196.136.131 and the Socket Port is set
to 3490, enter the following at a command prompt from any client computer:
telnet 129.196.136.131 3490
If you are using DHCP and the host name is test1 and the fully qualified domain name is
test1.na.tektronix.com and the Socket Port is set to 3490, enter the following at the
computer command prompt:
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DMM4040/4050
Programmer Manual
telnet test1.na.tektronix.com 3490
Once the internal LAN server connects with the client computer, the LAN server will
reject any other connection attempts by other computers and will “tunnel” a channel to
the connected computer. This prevents multiple computers from trying to control the
Meter.
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