Tektronix Series 2200 Multichannel Programmable DC Power Supplies Programming Reference manual

www.keithley.com

Series 2200

Multichannel Programmable DC Power Supplies

Programming Technical Reference

2220S-907-01 Rev. B / Dec 2013

ECNEDIFNOCFOERUSAEMRETAERGA

Multichannel Programmable DC Power Supplies

Series 2200

Programming Technical Reference

© 2013, Keithley Instruments, Inc.

Cleveland, Ohio, U.S.A.

All rights reserved.

Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part,

without the prior written approval of Keithley Instruments, Inc. is strictly prohibited.

All Keithley Instruments product names are trademarks or registered trademarks of Keithley

Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective

holders.

Document number: 2220S-907-01 Rev. B / Dec 2013

Safety precautions

The following safety precautions should be observed before using this product and an y associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all install a tion, operation, and maintenance information carefully before using
the product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.

Keithley Instruments products are designed for use with electrical signals that are measurement, control, and data I/O
connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high
transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring inst ruments may be connected to
mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test

fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.

Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)

connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use

of a lid interlock.

screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.

If a

The
user documentation in all cases where the symbol is marked on the instrument.

The
contact with these voltages.

The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The

If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.

The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power

transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national
safety approvals may be used if the rating and type are the same. Other components that are not safety-related may be
purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be
purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If yo u are unsure about the
applicability of a replacement component, call a Keithley Instruments office for information.

symbol on an instrument means caution, risk of danger. The user must refer to the operating instructions located in the

symbol on an instrument means caution, risk of electric shock. Use standard safety precautions to avoid personal

symbol indicates a connection terminal to the equipment frame.

To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do n ot app ly
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled
according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning/servicing.

Safety precaution revision of January 2013.

ii

-907-01 Rev. B/December 2013

2220S

Table of Contents

Preface .............................................................................................................. iii

Welcome ........................... ................................ .................................. .......... iii

Products.............................. .................................. ................................ ........ iii

Extended Warranty ....................... ................................ ................................ .... iv

Contact Information .......................................................................................... iv

Getting Started

Getting Started ... . .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. .. .. . 1-1

Using the USB interface .................................................................................... 1-1

Using the GPIB interface ................................ .................................. ................. 1-1

Command Timing........................................... ................................ ................. 1-2

Command Syntax.... ................................ ................................ ............................. 2-1

Command and Query Structure ............................................................................ 2-1

Command Entry.............................................................................................. 2-3

and Groups ................................................................................................ 2-7

Comm

Status Commands............................................................................................ 2-7

Save and Recall Commands ................................................................................ 2-8

System Commands ........................... ................................ ............................... 2-9

Diagnostic Commands ...................................................................................... 2-9

Synchronization Commands............................... ................................ ................. 2-9

Trigger Commands ... ................................ ................................ ..................... 2-10

Measurement Commands ................................................................................. 2-11

Source Commands........................ ................................ ................................ . 2-11

Channel Combination Commands ....................................................................... 2-12

Display Commands ........................................................................................ 2-12

Commands Listed in Alphabetical Order ................... .................................. ............... 2-13

Status and Events

Status and Events ................................................................................................. 3-1

Status Reporting Structure.................................................................................. 3-1

Registers ......... ................................ .................................. ........................... 3-3

Queues ........................................................................................................ 3-9

Messages and Codes.................... ................................ .................................. . 3-10

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual i

Table of Contents

Appendices

Appendix A: ASCII Code Chart ............................................................................... A-1

Appendix B: Programming Examples......................................................................... B-1

Appendix C: Default Setup..................................................................................... C-1

ii Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Preface

Welcome

Thank you for using a Keithley Instruments product. The Series 2200
Multichannel Programmable DC Power Supplies are flexible DC sources designed
to power a wi
offer three power channels and the model 2220-30-1 and its variants provide two
channels. The output channels on both models are independent and isolated,
allowing you to power circuits with different references or polarities. Each
channel can be enabled or disabled as your application requires. All outputs
feature remote sense capability which can be used to reduce the effect of lead
resistan
Basic current accuracy is 0.1% for all channels and linear regulation delivers
low noise – less than 3 mVp-p. Flexible display modes make it easy to use the
two 30 V outputs in combination, and the USB interface makes it easy to build
PC-based systems without converters or special cables. The G versions of each
model include a GPIB interface in combination with the USB interface.

These compact power supplies cover a wide range of applications without
covering a lot of bench space. Versions of these power supplies are available for

t 100 VAC nominal line voltage which is common in Japan. These versions

use a
are indicated by the "J" suffix.

de range of applications. The model 2230-30-1 and its variants

ce, delivering 0.03% basic voltage accuracy even when using long leads.

Products

This manual contains information about the following products:

ModelDescription

2220-30-1

Programmable Dual Channel DC Power Supply

2220G-30-1Programmable Dual Channel DC Power Supply with GPIB Interface

2220J-30-1

Programmable Dual Channel DC Power Supply for Japan

2220GJ-30-1Programmable Dual Channel DC Power Supply with GPIB Interface for Japan

2230-30-1

Triple Channel Programmable DC Power Supply

2230G-30-1Programmable Triple Channel DC Power Supply with GPIB Interface

2230J-30-1

Triple Channel Programmable DC Power Supply for Japan

2230GJ-30-1Programmable Triple Channel DC Power Supply with GPIB Interface for Japan

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual iii

Preface

Extended Warranty

Contact Information

Additional years of warranty coverage are available on many products. These
valuable contracts protect you from unbudgeted service expenses and provide
additional years of protection at a fraction of the price of a repair. Extended
warranties are available on new and existing products. Contact your local Keithley
Instrument

s representative for details.

If you have
following sources:

1. Keithley

2. Keithley web forum (http://forum.keithley.com)

3. Call Keithley Instruments corporate headquarters (toll-free inside the U.S. and

Canada only) at 1-888-KEITHLEY (1-888-534-8453), or from outside the
U.S. at
Instruments website (http://www.keithley.com).

any questions after reviewing this information, please use the

Instruments website (http://www.keithley.com)

[phone]. For worldwide contact numbers, visit the Keithley

iv Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Getting Started

Getting Started

Using the USB interface

Your power supply has a USB 2.0 high-speed device port to control the power
supply using the USBTMC protocol. The USBTMC protocol allows USB devices
to communica

If you have a G-version, you can also remotely communicate between your power
supply and PC over GPIB.

Start by connecting an appropriate USB cable between the USB 2.0 high-speed
device port on the rear panel of your power supply and a PC.

In order for the PC to recognize the power supply, a USBTMC driver must be
installed on the PC. A USBTMC driver can be installed on your PC by installing
a virtual instrument communications API like NIVISA. This VISA is available
for download from the Keithley or National Instruments Web sites. Once the
USBTMC driver is loaded, your PC will establish communication with the power
supply upon USB cable connection.

For further remote control and/or programming use, other software applications
may be needed in addition to a

te using IEEE-488.2 style messages.

VISA and the USBTMC driver.

Using the GPIB interface

Start by connecting an appropriate GPIB cable between the power supply and
either a PC or another instrument with a GPIB interface if the power supply is
in a multi-instrument system.

It is recommended that NIVISA be installed on your PC for the GPIB interface
for maximum programming flexibility.

To change GPIB address

settings

Your power supply must have a unique device address to function properly.
The default setting for the GPIB configuration is Communication Address 1.
If there is more than one GPIB instrument on the bus, you will need to change
the default setting on the power supply. To change the GPIB address settings,
do the following:

1. Push the Menu button on the instrument front-panel to access the main menu.

2. Press the up arrow key until you see User Settings andthenpresstheEnter

3. Press the up or down arrow key until you see Communication Port and

4. You can now change the address of your GPIB port.

button.

then press the Enter button.

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 1-1

Getting Started

Command Timing

The power suppl
controller.

The average time it takes to both send and receive every command is
approximately 20 ms. In the case of more complex commands, more time may
be required to complete transmission.

y is now set up for bidirectional communication with your

1-2 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Syntax

You can control the power supply through the USB interface or the GPIB interface
(G-version instruments only) using commands and queries.

This section describes the syntax these commands and queries use and the
conventions the power supply uses to process them. The commands and queries
themselves
Groups.)

are listed by group and alphabetically. (See page 2-7, Command

You tra ns m
Standard Code for Information Interchange (ASCII) character encoding. Appendix
A contains a chart of the ASCII character set.

The Backus Naur Form (BNF) notation is used in this manual to describe
commands and queries. (See Table 2-1.)

Table 2-1: BNF notation

Symbol Meaning

<>

::=

| Exclusive OR

{ } Group; one element is required

[]
.. .

( ) Comment

Command and Query Structure

Commands consist of set commands and query commands (usually simply called
commands and queries). Commands change power supply settings or perform a
specific action. Queries cause the power supply to return data and information
about its status.

it commands to the power supply using the enhanced American

Defined element

Is defined as

Optional; can be omitted

Previous element(s) may be repeated

Most commands have both a set form and a query form. The query form of the
command is the same as the set form except that it ends with a question mark.
For example, the set command STATus:OPERation:ENAble has a query form
STATus:OPERation:ENAble?. Not all commandshavebothasetandaquery
form; some commands are set only and some are query only.

A command message is a command or query name, followed by any information
the power supply needs to execute the command or query. Command messages
consist of five different element types. (See Table 2-3.)

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-1

Command Syntax

Table 2-2: Comm

Symbol Meaning

<Header>

<Mnemonic>

<Argument

<Comma> A single c

<Space>

>

and message elements

The basic command name. If the header ends with a question mark,
the command is a query. The header may begin with a colon (:)
character; i
beginning colon is required. The beginning colon can never be used
with command headers beginning with a star (*).

A header subfunction. Some command headers have only one
mnemonic. I
always separated from each other by a colon (:) character.

A quantity
Not all commands have an argument, while other commands have
multiple arguments. Arguments are separated from the header by a
<Space>. A

It may optionally have white space characters before and after the
comma.

A white space character between command header and argument. It
may optionally consist of multiple white space characters.

f the command is concatenated with other commands the

f a command header has multiple mnemonics, they are

, quality, restriction, or limit associated with the header.

rguments are separated from each other by a <Comma>.

omma between arguments of m ultiple-argument commands.

The following figure shows the five command message elements.

Commands

Queries

Figure 2-1: Command message elements

Commands cause the power supply to perform a specific function or change one
of its settings. Commands have the structure:

[:]<Header>[<Space><Argument>[<Comma><Argument>]...]

A command header is made up of one or more mnemonics arranged in a
hierarchical or tree structure. The first mnemonic is the base or root of the tree
and each subsequent mnemonic is a level or branch off of the previous one.
Commands at a higher level in the tree may affect those at a lower level. The
leading colon (:) always returns you to the base of the command tree.

Queries cause the power supply to return information about its status or settings.
Queries have the structure:

[:]<Header>

[:]<Header>[<Space><Argument>[<Comma><Argument>]...]

2-2 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Syntax

Query Responses

Command Entry

You can specify

a query command at any level within the command tree unless
otherwise noted. These branch queries return information about all the mnemonics
below the specified branch or level.

When a query is sent to the power supply, only the values are returned. When
the returned value is a mnemonic, it is noted in abbreviated format, as shown
in the following table.

Table 2-3: Query response examples

Query Response

MEASure:VOLTage:DC?

SOURce:FUNCtion:MODE?

5.0011

LIST

Follow these general rules when entering commands:

Enter commands in upper or lower case.

You can precede any command with white space characters. White space
characters include any combination of the ASCII control characters 00 through
09 and 0B through 20 hexadecimal (0 through 9 and 11 through 32 decimal).

SCPI Commands and

Queries

The power supply ignores commands that consists of just a combination of
white space characters and line feeds.

The power supply uses a command language based on the SCPI standard. The
SCPI (Standard Commands for Programmable Instruments) standard was created
by a consortium to provide guidelines for remote programming of instruments.
These guidelines provide a consistent programming environment for instrument
control and data transfer. This environment uses defined programming messages,
instrument responses and data formats that operate across all SCPI instruments,
regardless of manufacturer.

The SCPI language is based on a hierarchical or tree structure that represents a
subsystem. The top level of the tree is the root node; it is followed by one or more
lower-level nodes. (See Figure 2-2.)

Figure 2-2: Example of SCPI subsystem hierarchy tree

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-3

Command Syntax

Message Terminators

Parameter types

You can create c

ommands and queries from these subsystem hierarchy trees.
Commands specify actions for the instrument to perform. Queries return
measurement data and information about parameter settings.

This manual u

ses the term <EOM> (End of message) to represent a message

terminator.

USB End of Message (EOM) terminators. See the USB Test a nd Measurement
Class Specification (USBTMC) section 3.2.1 for details. The power supply
terminates messages by setting the EOM bit in the USB header of the last
transfer

of a message to the host (USBTMC Specification section 3.3.1), and by

terminating messages with a LF.

When rec

eiving, the power supply expects a LF and an asserted EOM bit as a
message terminator. When using the GPIB interface, the power supply expects a
line feed (LF) as the message terminator.

Many po

wer supply commands require parameters. Parameters are indicated
by angle brackets, such as <file_name>. There are several different types of
parameters, as listed in the following table. The parameter type is listed after the
parameter. Some parameter types are defined specifically for the power supply
command set and some are defined by SCPI. (See Table 2-4.)

Table 2-4: Types of parameters

Parameter type Description Example

boolean Boolean numbers or values ON or ≠ 0

OFF or 0

discrete

NR1 numeric Integers 0, 1, 15, -1

NR2 numeric Decimal numbers 1.2, 3.141516, -6.5

NR3 numeric Floating point numbers 3.1415E-9, -16.1E5

NRf numeric

string

A list of specific values

Flexible decimal number that
maybetypeNR1,NR2,orNR3

Alphanumeric characters (must
be within quotation marks)

MIN, MAX

See NR1, NR2, NR3 examples in
this table

“Testing 1, 2, 3”

2-4 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Syntax

Abbreviating Commands,

Queries, and Parameters

Chaining Commands and

Queries

You can abbrevi
short form. This manual shows these commands as a combination of upper and
lower case letters. The upper case letters indicate the accepted short form of a
command, as shown in the following figure. The accepted short form and the long
form are equivalent and reques t the same action of the instrument.

Figure 2-3: Example of abbreviating a command

You can chain several commands or queries together into a single message. To
create a chained message, first create a command or q
(;), and finally add more commands or queries and semicolons until you are done.
If the command following a semicolon is a root node, precede it with a colon
(:). The following figure illustrates a chained message consisting of several
commands and queries. The chained message should end in a command or query,
not a semicolon. Responses to any queries i n your message are separated by
semicolons.

ate most SCPI commands, queries, and parameters to an accepted

uery, then add a semicolon

Figure 2-4: Example of chaining commands and queries

If a command or query has the same root and lower-level nodes as the previous
command or query, you can omit these nodes. In the following figure, the second
command has the same root node (STAT:QUES) as the first command, so these
nodes can be omitted.

Figure 2-5: Example of omitting root and lower level nodes

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-5

Command Syntax

General Rules for Using

SCPI Commands

The following a

re three general rules for using SCPI commands, queries, and

parameters:

You c an us e s in

gle (‘ ’) or double (“ ”) quotation marks for quoted strings, b ut

you cannot use both types of quotation marks for the same string.

correct

correct

incorrect “This strin

“This string uses quotation marks correctly.”

‘This string also uses quotation marks correctly.’

g does not use quotation marks correctly.’

You can use upper case, lower case, or a mixture of both cases for all
commands, queries, and parameters.

:SOURCE:FREQUENCY 10MHZ

is the same as

:source:frequency 10mhz

and

:SOURCE:frequency 10MHZ

NOTE. Q

uoted strings are case sensitive.

No embedded spaces are allowed between or within nodes.

correct

incorrect

:OUTPUT:FILTER:LPASS:FREQUENCY 200MHZ

:OUTPUT: FILTER: LPASS:FREQUENCY 200MHZ

2-6 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Groups

This manual lists the power supply commands in two ways. First, it presents
them by functional groups. Then, it lists them alphabetically. The functional
group list st
(See page 2-13.)

The power supply interface conforms to Keithley standard codes and formats
except where noted. The GPIB interface also conforms to IEEE Std 488.2–1987
except where noted. The USB interface also conforms to USB Test and
Measurement Class, Subclass USB488 Specification, except where noted.
Arguments are not mentioned in the group command descriptions, but are listed
under the commands in the Commands Listed in Alphabetical Order section of
this manual. (See page 2 -13.)

Status Commands

Status commands let you determine the status of the power supply and control
events.

Several commands and queries are common to all devices on the GPIB or USB
bus. These commands and queries are defined by IEEE Std. 488.2-1987 and Tek
Standard Codes and Formats 1989, and begin with an asterisk (*) character.

arts below. The alphabetical list provides detail on each command.

Table 2-5: Status commands

Command Description

*CLS Clear all event registers and queues.

*ESE Set/query standard event status enable register.

*ESR?

*IDN? Return identification information in IEEE 488.2 notation.

*RST

*PSC Set/query power-on status clear.

*SRE Set/query service request enable register.

*STB?

STATus:QUEStionable:INSTrument[:EVENt]?

STATus:QUEStionable:INSTrument:ENABle Set/query questionable enable register. This parameter

STATus:QUESTionable:INSTrument:ISUMmary<x>:[EVENt]? Return questionable event register summary for channel x,

STATus:QUEStionable:INSTrument:ISUMmary<x>:ENABle Set/query questionable enable register summary for channel x,

Return standard event status register.

Resets to known settings, but does not purge stored settings.

Read status byte.

Return questionable event register.

determines which bit of the quest event register is set to 1. If a
QUES condition changes, the QUES bit of status byte register
will be set to 1.

where <x> is 1, 2, or 3.

where <x> is 1, 2, or 3. This parameter determines which bit of
the quest event register is set to 1. If a QUES condition changes,
the QUES bit of status byte register will be set to x.

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-7

Command Groups

Table2-5:Statuscommands(cont.)

Command Description

STATus:QUEStionable:INSTrument:ISUMmary<x>:CONDition? Return questionable condition register summary for channel

x, where <x> is 1, 2, or 3. When a bit of the quest condition
changes, the corresponding bit value in the quest event register
will be set to x.

STATus:QUEStionable:ENABle Set/query questionable enable register. This parameter

determines which bit of the quest event register is set to 1. If a
QUES condition changes, the QUES bit of status byte register
will be set to 1.

STATus:QUEStionable[:EVENt]?

STATus:OPERation:INSTrument[:ENABle]? Set/query operation enable register. The parameter determines

STATus:OPERation:INSTrument[:EVENt]?

STATus:OPERation:INSTrument[:EVENt]? Queries the contents of the operation instrument event register

STATus:OPERation:INSTrument[:ENABle]? Queries the contents of the operation instrument enable register

STATus:OPERation:INSTrument:ISUmmary<x>[:EVENt]? Return operation event register for channel x, where <x> is 1,

STATus:OPERation:INSTrument:ISUmmary<x>:ENABle Set/query operation enable register for channel x, where <x> is

STATus:OPERation:INSTrument:ISUMmary<x>:CONDition? Return operation condition register for channel x, where <x> is

Return questionable event register.

which bit value of quest event register is set to 1. If a OPER
condition changes, the OPER bit of the status byte register will
be set to 1.

Return operation event register.

(OIEVR).

(OIENR).

2, or 3.

1, 2, or 3. The parameter determines which bit value of quest
event register is set to 1. If a OPER condition changes, the
OPER bit of the status byte register will be set to 1.

1, 2, or 3. When a parameter of the operation condition register
changes, the corresponding bit in the operation event register
will be set to 1.

Save and Recall Commands

Save and recall commands allow you to save the active settings to one of the
settings memories within the power supply, and recall those settings at a later time.

Table 2-6: Save and recall commands

Header Description

*SAV Save instrument setting to setup memory

*RCL Recall instrument setting from setup memory

2-8 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Groups

System Comman

Table 2-7: System commands

Header Description

SYSTem:POSetup Set or query power-on parameters

SYSTem:MODUle? Queries the module of the power supply

SYSTem:VERSion? Return SCPI version information

SYSTem:MODUle? Return error code and error information

SYSTem:KEY Set or query key operation

SYSTem:REMote Set or query remote mode

SYSTem:RWLock Set to remote mode and lock front-panel

SYSTem:LOCal Set to front-panel control mode

ds

Diagnostic Commands

The po
is functioning as expected. A table of error codes that may be returned by the self
test are given in the Messages and Codes section. (See page 3-10.)

Table 2-8: Diagnostic commands

wer supply includes a self test function that may be used to confirm that it

Header Description

*TST? Perform self-test and return result status

Synchronization Commands

Table 2-9: Synchronization commands

Header Description

*OPC Set/query operation complete

*WAI

Wait to continue

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-9

Command Groups

Trigger Comma

Table 2-10: Trigger commands

Header Description

TRIGger[:IMMediate]

*TRG Generates a trigger event.

[SOURce:]VOLTage:TRIGgered[:IMMediate] Set or query the trigger voltage.

[SOURce:]CURRent:TRIGgered[:IMMediate] Set or query the trigger current.

INSTrument:COUPle[:TRIGger] Set or query the channel that will respond the trigger command.

nds

Trigger commands are used to determine the timing of list mode sequences.

Forces an immediate trigger event.

2-10 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Command Groups

Measurement C

ommands

Measurement commands are used to query parameters. The MEASure commands
initiate and execute a complete measurement cycle and are recommended for
measuring vo

ltage and current at the outputs of the power supply.

FETCh

commands do not initiate a new measurement cycle but rely on measurements
stored in the communication buffers of the power supply. The

FETCh commands

are provided for voltage and current measurements to maintain compatibility
with other instruments. Output power, however, is only available using a
command.

Table 2-11: Measurement commands

Command Description

MEASure[:SCALar][:VOLTage][:DC]?

MEASure[:SCALar]:POWer[:DC]?

MEASure[:SCALar]:CURRent[:DC]?

FETCh[:SCALar]:CURRent[:DC]? Query the output current stored in the communications buffer

FETCh[:SCALar]:POWer[:DC]? Query the output power stored in the communications buffer

FETCh[:SCALar]:VOLTage[:DC]? Query the output voltage stored in the communications buffer

Initiate a measurement and query the measured output voltage

Initiate a measurement and query the measured output current

Initiate a measurement and query the measured output current

FETCh

Source Commands

These commands allow you to set various output parameters. Some of the
commands are used to configure protection functions like output timers and Max
Voltage.

Table 2-12: Source commands

Command Description

[SOURce:]CURRent[:LEVel][:IMMediate][:AMPLitude] Set or query the current value in units of A or mA.

[SOURce:]CURRent[:LEVel]:UP[:IMMediate][:AMPLitude] Set the current level to increase a step.

[SOURce:]CURRent[:LEVel]:DOWN[:IMMediate][:AMPLitude] Set the current level to decrease a step.

[SOURce:]CURRent[:LEVel][:IMMediate]:STEP[:INCRement] Set or query the current step value.

[SOURce:]OUTPut:TIMer[:STATe] Set or query the state of the output timer.

[SOURce:]OUTPut[:STATe][:ALL] Set or query power supply output on or off.

[SOURce:]OUTPut:TIMer:DELay Set or query the time duration of output timer.

[SOURce:]VOLTage[:LEVel][IMMediate][:AMPLitude] Set or query voltage level.

[SOURce:]VOLTage[:LEVel]:UP[:IMMediate][:AMPLitude] Set to increase the voltage level by a step.

[SOURce:]VOLTage[:LEVel]:DOWN[:IMMediate][:AMPLitude] Set to decrease the voltage level by a step.

[SOURce:]VOLTage[:LEVel][:IMMediate]:STEP[:INCRement] Set or query the voltage step value.

[SOURce:]VOLTage:LIMit:STATe Set or query enable/disable voltage limit function.

[SOURce:]VOLTage:LIMit[:LEVel] Set or query the maximum output voltage setting.

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-11

Command Groups

Table 2-12: Source commands (cont.)

Command Description

[SOURce:]OUTPut:ENABle Set or query the current channel as enabled or disabled.

[SOURce]:CHANnel:OUTPut:[STATe] Set or query the output status of the current channel.

[SOURce:]APPly Sets voltage and current level and switch channels at the same

time.

[SOURce:]OUTPut:PARallel[:STATe] Sets the parallel state of CH1 and CH2.

[SOURce:]OUTPut:SERies Sets the serial state of CH1 and CH2.

[SOURce:]OUTPut:PON[:STATe] Sets the power supply to power up with its output turned off, or to

return the output to the state it was in when it powered down.

Channel Combination Commands

These commands allow you to set various channel combinations. The commands

n use depends on the number of channels your instrument has.

you ca

Table 2-13: Channel combination commands

Command Description

INSTrument:SELect Switch or query the current channel.

INSTrument:COMbine:SERies Set CH1 and CH2 in series.

INSTrument:COMbine:PARAllel Set CH1 and CH2 in parallel.

INSTrument:COMbine:TRACk Set CH1 and CH2 to track.

INSTrument:COMbine:OFF Remove the combination of channels.

INSTrument:COMbine? Query which channels are combined.

Display Commands

Display commands are used to clear of show particular strings on the instrument
display.

Table 2-14: Display commands

Header Description

DISPlay[:WINDow][:STATe] Set or query the display state.

DISPlay[:WINDow]:TEXT[:DATA] Set or query the display to show a particular string.

DISPlay[:WINDow]:TEXT:CLEar Set to clear the characters on the display and returns the display

to normal mode.

2-12 Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual

Commands Listed in Alphabetical Order

You can use commands to either set instrument features or query instrument
values. You can use some commands to do both, some only to set and some only
to query. Thi
Form” included with the command name. It marks query-only commands with
a question mark appended to the header, and includes the words “Query Only”
in the command name.

This document spells out headers, mnemonics, and arguments with the minimal
spelling shown in uppercase. For example, to use the abbreviated form of the

MEASure:SCALar:VOLTage:DC? command, type MEAS:S CAL:VOLT:DC?.

*CLS (No Query Form)

s document marks set-only commands with the words “No Query

The *CLS

Group

Syntax

Related Commands

Status

*CLS

*ESR?, *STB?

DISPlay[:WINDow][:STATe]

Sets or queries the state of the instrument display.

Group

Syntax

Arguments

Display

DISPlay[:WINDow][:STATe] {0|1 |ON|OFF}
DISPlay[:WINDow][:STATe]?

0|1|ON|OFF

command clears all event registers and queues.

DISPlay[:WINDow]:TEXT[:DATA]

Sets or queries the state of the instrument display to show a particular string.

Group

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-13

Display

Commands Listed in Alphabetical Order

Syntax

Arguments

DISPlay[:WIND
DISPlay[:WINDow]:TEXT[:DATA]?

String with quotes. 48 character length limit.

ow]:TEXT[:DATA] <string>

DISPlay[:WINDow]:TEXT:CLEar (No Query Form)

Clears the characters on the display and then returns the display to normal m ode.

Group

Syntax

Arguments

Display

DISPlay[:WINDow]:TEXT:CLEar

None

*ESE

Sets and queries the bits in the Event Status Enable Register (ESER). The ESER
is an eight-bit mask register that determines which bits in the Standard Event
Status Register (SESR) will set the ESB bit in the Status Byte Register (SBR).
(See page 3-1, Status and Events.)

Group

Syntax

Related Commands

Arguments

Examples

Status

*ESE <mask>
*ESE?

*CLS, *ESR?

<mask>::=<NR1> where:

<NR1> is a value in the range from 0 through 255

are set according to this value.

The power-on default for ESER is 0 if *PSC is 1. If *PSC is 0, the ESER
maintains its value through a power cycle.

*ESE 145 sets the ESER to binary 10010001, which enables the PON, EXE,

and OPC bits.

. The binary bits of the ESER

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Commands Listed in Alphabetical Order

*ESR? (Query Only)

Group

Syntax

Related Commands

Returns

*ESE might retu

binary value 10111010.

Returns the contents of the Standard Event Status Register (SESR). *ESR? also
clears the SESR (since reading the SESR clears it). (See page 3-1, Status and
Events.)

Status

*ESR?

*CLS, *OPC, *SRE,

<NR1>, which is a decimal representation of the contents of the Standard Event

Status Register (SESR).

rn the string

*ESE 186, showing that the ESER contains the

FETCh[:SCAL

Related Commands

Examples

*ESR? might return the value 149, showing that the SESR contains binary

10010101.

ar]:CURRent[:DC]? (Query Only)

This command returns the last measured output current stored in the
communications buffer of the power supply. A new measurement is not initiated

and.

Group

Syntax

by this comm

CAUTION. Using this FETCh c ommand may return an old result, which could

adversely affect the accuracy of your test. In most cases, using the MEASure
command is recommended. The benefit of the FETCh command is that it provides
a result a bit more quickly than the MEASure command.

Measurement

FETCh[:SCALar]:CURRent[:DC]? [CH1|CH2|CH3|ALL]

MEASure[:SCALar]:POWer[:DC]?

Series 2200 Programmable Multichannel DC Power Supplies Programmer Manual 2-15

Commands Listed in Alphabetical Order

Returns

Examples

<NR2>, which gi

FETC:CURR? might return 0.09998, which would be the current measured at the

output of the power supply in amperes.

ves is the measured output current in amperes.

FETCh[:SCALar]:VOLTage[:DC]? (Query Only)

This command returns the last measured output voltage stored in the
communications buffer of the power supply. A new measurement is not initiated
by this command.

Group

Syntax

Related Commands

Returns

Measurement

FETCh[:SCALar]:VOLTage[:DC]? [CH1|CH2|CH3|ALL]

MEASure[:SCALar][:VOLTage][:DC]?

<NR2> is the measured output voltage in volts.

Examples

FETC:VOLT? might return 5.0011, which would be the measured voltage across

the power supply outputs in volts.

FETCh[:SCALar]:POWer[:DC]? (Query Only)

This command returns the calculated power based on the last measured output
voltage and current. A new measurement is not initiated by this command. The
power calculation in the instrument is performed approximately every 100 ms.
Insure that the voltage and current are stable longer than this for good results.

Group

Syntax

Returns

Examples

Measurement

FETCh[:SCALar]:POWer[:DC]? [ CH1|CH2|CH3|ALL]

<NR2> is the measured output power in watts.

FETCh:POW? might return 6.01667, which would be the power measured at the

output of t he power supply in watts.

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