Instek PEL-3021, PEL-3041, PEL-3111, PEL-3211 Programming Manual

Download

DC Electronic Load

PEL-3000

PROGRAMMING MANUAL

VERSION: 1.11

ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company.

The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures at any time without notice.

Good Will Instrument Co., Ltd. No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan.

Table of Contents

INTERFACE OVERVIEW ..................................................... 2

Front Panel Overview ............................. 3

Rear Panel Overview .............................. 4

Interface Configuration .......................... 5

COMMNAND OVERVIEW ................................................ 16

Command Syntax ................................. 16

Command List ..................................... 21

Error Messages .................................... 90

PEL-3000 Programming Manual

Front Panel Overview ........................................................ 3

Rear Panel Overview .......................................................... 4

Interface Configuration ..................................................... 5

Configure to USB Remote Interface ....................................................................... 5

Configure GPIB Interface ........................................................................................ 6

Configure RS232C ..................................................................................................... 7

RS232C/USB Remote Control Function Check ................................................... 8

Using Realterm to Establish a Remote Connection .............................................. 9

GPIB Function Check ............................................................................................ 13

INTERFACE OVERVIEW

This chapter describes basic configuration of IEEE488.2 based remote control.

INTERFACE OVERVIEW

I MON OUT TRIG OUT

1.5 - 150V

175W

0 - 35A

CAL.

Lock

Utility

Local

File

EnterClear

Shift

Preset

Load

On/ Off

Main

Help

FUNC

Short

Air inlet LCD Display Power key

FUNC/File

Help/Utility

Short

Load On/Off

USB Port, Preset and Shift keys

Number pad, Clear/ Lock and Enter keys

Main/Local

Scroll wheel

Function keys

Input terminals

I MON OUT, TRIG OUT

Front Panel Overview

(PEL-3021/PEL-3041 shown)

PEL-3000 Programming Manual

47 - 63 Hz

90 VA MAX.

100 - 120 VAC 200 - 240 VAC

FRAME CONT

J 1

J 2

SER. NO. LB

RS232C

GPIB

WARNING

TO AVOID ELECTRIC SHOCK THE POWER CORD

DO NOT REMOVE COVERS.

NO OPERATOR SERVICEABLE COMPONENTS INSIDE.

PROTECTIVE GROUNDING CONDUCTOR MUST BE

REFER SERVICING TO QUALIFIED PERSONNEL.

CONNECTED TO GROUND.

Remote sense inputs

Frame control ports, J1, J2

RS232C port

USB port

USB device port

Exhaust fanGPIB Power socket

Rear panel inputs

Rear Panel Overview

(PEL-3021 / PEL-3041 shown)

INTERFACE OVERVIEW

USB configuration

PC side connector

Type A, host

PEL-3000 side connector

Rear panel Type B, slave

Speed

2.0 (full speed)

USB Class

USB CDC AMC

Note

Before USB can be used for remote control, it is necessary to install the PEL-3000 USB device driver, located on the accompanying User Manual CD.

Operation

1. Connect the USB cable to the rear panel USB B

port.

2. Press

Shift

Utility

Help

> Interface[F3] and set

the Interface setting to USB.

Interface Configuration

Configure to USB Remote Interface

PEL-3000 Programming Manual

Operation

1. Ensure the PEL-3000 is off before proceeding.

2. Connect a GPIB cable from a GPIB controller to

the GPIB port on the PEL-3000.

3. Turn the PEL-3000 on.

4. Press

Shift

Utility

Help

> Interface[F3] and set

the Interface setting to GPIB.

5. Set the GPIB address.

GPIB address

0~30

GPIB constraints



Maximum 15 devices altogether, 20m cable length,

2m between each device



Unique address assigned to each device



At least 2/3 of the devices turned On



No loop or parallel connection

Pin Assignment

112

1324

Signal

Signal 1~4

Data I/O 1~4

13~16

Data I/O 5~8

5 EOI

REN 6

DAV

Ground (DAV)

7 NRFD

Ground (NRFD)

8 NDAC

Ground (NDAC)

9 IFC

Ground (IFC)

SRQ

Ground (SRQ)

Configure GPIB Interface

To use GPIB, the optional GPIB port must be installed. See the user manual for details.

INTERFACE OVERVIEW

ATN

Ground (ATN)

SHIELD Ground

Single GND

RS232C Configuration

Connector

DB-9, Male

Baud Rate

2400, 4800, 9600, 19200, 38400

Stop Bit

1, 2

Parity

None, Odd, Even

Operation

1. Connect an RS232C cable from the PC to the

rear panel RS232 port.

2. Press

Shift

Utility

Help

> Interface[F3] and

set the Interface setting to RS232.

3. Set the Baud Rate, Stop Bit and Parity settings.

Pin Assignment

1 2 3 4 5

6 7 8 9

2: RxD (Receive data)

3: TxD (Transmit data)

5: GND

4, 6 ~ 9: No connection

PC Connection

Use a null modem connection as shown in the diagram below.

PEL-3000 PC

RxDPin2 RxD Pin2

GNDPin5 GND Pin5

TxD Pin3

TxDPin3

Configure RS232C

PEL-3000 Programming Manual

Functionality check

Invoke a terminal application such as RealTerm. For RS232C, set the COM port, baud rate, stop bit, data bit and parity accordingly.

To check the COM settings, see the Device Manager in the PC. For WinXP; Control panel → System → Hardware tab.

Run this query command via the terminal after the instrument has been configured for RS232/USB remote control (page 5).

*idn?

This should return the Manufacturer, Model number, Serial number, and Firmware version in the following format.



GW-INSTEK,PEL-3000, XXXXXXXXXXXX,

V.X.X.X.X

Manufacturer: GW-INSTEK Model number : PEL-3000 Serial number : XXXXXXXXXXXX Firmware version : V.X.X.X

RS232C/USB Remote Control Function Check

INTERFACE OVERVIEW

Background

Realterm is a terminal program that can used to communicate with a device attached to the serial port of a PC or via an emulated serial port via USB.

The following instructions apply to version

1.99.0.27. Even though Realterm is used as an example to establish a remote connection, any terminal program can be used that has similar functionality.

Note

Realterm can be downloaded on Sourceforge.net free of charge.

For more information please see http://realterm.sourceforge.net/

Operation

1. Download Realterm and install according to the

instructions on the Realterm website.

2. Connect the PEL-3000 via USB (page 5) or via

RS232 (page 7).

3. If using RS232, make note of the configured

baud rate, stop bits and parity.

4. Go to the Windows device manager and find

the COM port number for the connection. For example, go to the Start menu > Control Panel > Device Manager

Double click the Ports icon to reveal the connected serial port devices and the COM port for the each connected device.

Using Realterm to Establish a Remote Connection

PEL-3000 Programming Manual

If using USB, the baud rate, stop bit and parity settings can be viewed by right-clicking the connected device and selecting the Properties option.

5. Start Realterm on the PC as an administrator.

Click: Start menu>All Programs>RealTerm>realterm

Tip: to run as an administrator, you can right click the Realterm icon in the Windows Start menu and select the Run as Administrator option.

INTERFACE OVERVIEW

6. After Realterm has started, click on the Port tab.

Enter the Baud, Parity, Data bits, Stop bits and Port number configuration for the connection.

The Hardware Flow Control, Software Flow Control options can be left at the default settings.

Press Open to connect to the PEL-3000.

PEL-3000 Programming Manual

7. Click on the Send tab.

In the EOL configuration, check on the +CR and +LF check boxes.

Enter the query: *idn?

Click on Send ASCII.

8. The terminal display will return the following:

GW, PEL-3XXX,EXXXXXXX,VX.XX.XXX

(manufacturer, model, serial number, version)

9. If Realterm fails to connect to the PEL-3000,

please check all the cables and settings and try again.

INTERFACE OVERVIEW

Functionality check

Please use the National Instruments Measurement & Automation Controller software to confirm GPIB/LAN functionality.

See the National Instrument website, http://www.ni.com for details.

Operation

1. Start the NI Measurement and

Automation Explorer (MAX) program. Using Windows, press:

Start>All Programs>National Instruments>Measurement & Automation

2. From the Configuration panel access;

My System>Devices and Interfaces>GPIB0

GPIB Function Check

PEL-3000 Programming Manual

3. Press the Scan for Instruments button.

4. In the Connected Instruments panel the PEL-3000

should be detected as Instrument 0 with the address the same as that configured on the PEL-3000.

5. Double click the Instrument 0 icon.

6. Click on Communicate with Instrument.

7. In the NI-488.2 Communicator window, ensure

*IND? is written in the Send String: text box.

Click on the Query button to send the *IDN? query to the instrument.

8. The String Received text box will display the

query return:

GW, PEL-3XXX,EXXXXXXX,VX.XX.XXX

(manufacturer, model, serial number, version)

INTERFACE OVERVIEW

7 8

9. The function check is complete.

PEL-3000 Programming Manual

Compatible Standard

IEEE488.2

Partial compatibility

SCPI, 1999

Partial compatibility

Command Structure

SCPI (Standard Commands for Programmable Instruments) commands follow a tree-like structure, organized into nodes. Each level of the command tree is a node. Each keyword in a SCPI command represents each node in the command tree. Each keyword (node) of a SCPI command is separated by a colon (:).

For example, the diagram below shows an SCPI sub-structure and a command example.

:RESPonse:CRANGe :VRANGe

[:MODE]:CRANGe

:MODE

COMMNAND OVERVIEW

The Command overview chapter lists all PEL-3000 commands in functional order as well as alphabetical order. The command syntax section shows you the basic syntax rules you have to apply when using commands.

Command Syntax

COMMNAND OVERVIEW

Command types

There are a number of different instrument commands and queries. A command sends instructions or data to the unit and a query receives data or status information from the unit.

Command types

Simple

A single command with/without a parameter

Example

:CONFigure:RESPonse MAX

Query

A query is a simple or compound command followed by a question mark (?). A parameter (data) is returned.

Example

:CONFigure:RESPonse?

Compound

Two or more commands on the same command line. Compound commands are separated with either a semicolon (;) or a semi-colon and a colon (;:).

A semi-colon is used to join two related commands, with the caveat that the last command must begin at the last node of the first command.

A semi-colon and colon are used to combine two commands from different

PEL-3000 Programming Manual

nodes.

Example

CONFigure:VON MAX;:CONFigure:VDELay MIN

Command Forms

Commands and queries have two different forms, long and short. The command syntax is written with the short form of the command in capitals and the remainder (long form) in lower case.

The commands can be written in capitals or lower-case, just so long as the short or long forms are complete. An incomplete command will not be recognized.

Below are examples of correctly written commands.

Long form

:CURRent:LEVel? :CURRENT:LEVEL? :current:level?

Short form

:CURR:LEV? :curr:lev?

Square Brackets

Commands that contain square brackets indicate that the contents are optional. The function of the command is the same with or without the square bracketed items, as shown below

For example for the query: “[:CONFigure]:GNG [:PASS]?”

Both “:CONFigure:GNG:PASS?” and “:GNG?” are both valid forms.

Command Format

1.0 0A

2 3 4

:CURRent:Set

1. Command header

2. Space

3. Parameter 1

4. Unit or suffix.

Common Input Parameters

Type

Description

Example

boolean logic

0, 1

<NR1>

integers

0, 1, 2, 3

<NR2>

decimal numbers

0.1, 3.14, 8.5

<NR3>

floating point

4.5e-1, 8.25e+1

<NRf>

any of NR1, 2, 3

1, 1.5, 4.5e-1

[MIN] (Optional parameter)

For commands, this will set the setting to the lowest value. This parameter can be used in place of any numerical parameter where indicated.

For queries, it will return the lowest possible value allowed for the particular setting.

[MAX] (Optional parameter)

For commands, this will set the setting to the highest value. This parameter can be used in place of any numerical parameter where indicated.

For queries, it will return the highest possible value allowed for the particular setting.

Unit Suffixes (Optional parameters)

Unit suffixes can be optionally used with most NRf type input parameters.

COMMNAND OVERVIEW

PEL-3000 Programming Manual

[A]

Amps

1.00A

[%]

Percentage

10%

[V]

Volts

5.00V

[W]

Watts

3.00W

[mS]

milliseconds

20mS

[mV]

Millivolts

150mV

[S]

Seconds

[MHO]

Reciprocal of one ohm

0. 02MHO

[mA/uS]

Millamps/ microsecond

100mA/uS

[Hz]

Hertz

1000Hz

Message Terminator

Line feed code (0x0A)

COMMNAND OVERVIEW

Common Commands

*CLS ....................................................................................... 25

*ESE ....................................................................................... 25

*ESR? ..................................................................................... 26

*IDN? ..................................................................................... 26

*OPC ...................................................................................... 27

*RCL ....................................................................................... 27

*RST ....................................................................................... 27

*SAV ....................................................................................... 28

*SRE ....................................................................................... 28

*STB? ..................................................................................... 29

*TRG ...................................................................................... 29

*TST? ..................................................................................... 30

Trigger Commands

:ABORt .................................................................................. 30

:INPut ..................................................................................... 30

:INPut:SHORt ...................................................................... 31

Measurement Commands

:MEASure:CURRent? .......................................................... 32

:MEASure:VOLTage? .......................................................... 32

:MEASure:POWer? .............................................................. 32

:MEASure:ETIMe? ............................................................... 33

Configure Subsystem Commands

[:CONFigure]:OCP .............................................................. 34

[:CONFigure]:OPP ............................................................... 35

[:CONFigure]:UVP ............................................................... 36

[:CONFigure]:OVP .............................................................. 36

[:CONFigure]:SSTart ............................................................ 37

[:CONFigure]:VON ............................................................. 38

[:CONFigure]:VDELay ........................................................ 38

:CONFigure:RESPonse ....................................................... 39

[:CONFigure]:CNTime ........................................................ 40

[:CONFigure]:COTime ........................................................ 40

[:CONFigure]:CRUnit .......................................................... 41

:CONFigure:DYNamic ........................................................ 41

:CONFigure:MEMory .......................................................... 42

:CONFigure:SHORt ............................................................. 43

Command List

PEL-3000 Programming Manual

[:CONFigure]:GNG:SPECtest ........................................... 43

[:CONFigure]:GNG:DTIMe .............................................. 44

[:CONFigure]:GNG:MODE .............................................. 44

[:CONFigure]:GNG[:PASS]................................................ 45

[:CONFigure]:GNG:H ........................................................ 45

[:CONFigure]:GNG:L ......................................................... 46

[:CONFigure]:GNG:C ......................................................... 46

Parallel Commands

[:CONFigure]:PARallel ........................................................ 47

Step Commands

[:CONFigure]:STEP:CCH ................................................... 48

[:CONFigure]:STEP:CCM .................................................. 49

[:CONFigure]:STEP:CCL .................................................... 50

[:CONFigure]:STEP:CC ...................................................... 50

[:CONFigure]:STEP:CRH ................................................... 51

[:CONFigure]:STEP:CRM .................................................. 51

[:CONFigure]:STEP:CRL .................................................... 52

[:CONFigure]:STEP:CR ...................................................... 52

[:CONFigure]:STEP:CVH ................................................... 53

[:CONFigure]:STEP:CVL ................................................... 53

[:CONFigure]:STEP:CV ...................................................... 54

[:CONFigure]:STEP:CPH ................................................... 54

[:CONFigure]:STEP:CPM ................................................... 55

[:CONFigure]:STEP:CPL .................................................... 55

[:CONFigure]:STEP:CP ...................................................... 56

External Commands

[:CONFigure]:EXTernal[:CONTrol] ................................. 57

[:CONFigure]:EXTernal:LOADonin ................................ 57

[:CONFigure]:EXTernal:SYNC ......................................... 58

Mode Subsystem Commands

:MODE .................................................................................. 59

[:MODE]:CRANge .............................................................. 59

[:MODE]:VRANge .............................................................. 60

[:MODE]:RESPonse ............................................................ 60

[:MODE]:DYNamic ............................................................ 61

COMMNAND OVERVIEW

Current Subsystem Commands

:CURRent[:VA] ..................................................................... 62

:CURRent:VB ........................................................................ 63

:CURRent:SRATe ................................................................. 63

:CURRent:L1 ......................................................................... 64

:CURRent:L2 ......................................................................... 64

:CURRent:SET ...................................................................... 65

:CURRent:LEVel .................................................................. 66

:CURRent:RISE .................................................................... 66

:CURRent:FALL ................................................................... 67

:CURRent:T1 ......................................................................... 67

:CURRent:T2 ......................................................................... 68

:CURRent:FREquency ......................................................... 69

:CURRent:DUTY ................................................................. 69

Resistance Subsystem Commands

:RESistance[:VA] .................................................................. 71

:RESistance:VB ..................................................................... 72

:RESistance:SRATe .............................................................. 72

:RESistance:L1 ...................................................................... 73

:RESistance:L2 ...................................................................... 74

:RESistance:SET ................................................................... 74

:RESistance:LEVel................................................................ 75

:RESistance:RISE ................................................................. 76

:RESistance:FALL ................................................................ 76

:RESistance:T1 ...................................................................... 77

:RESistance:T2 ...................................................................... 78

:RESistance:FREquency ...................................................... 78

:RESistance:DUTY ............................................................... 79

Voltage Subsystem Commands

:VOLTage[:VA] ..................................................................... 81

:VOLTage:VB ....................................................................... 81

Power Subsystem Commands

:POWer[:VA] ......................................................................... 83

:POWer:VB ............................................................................ 84

:POWer:L1 ............................................................................. 84

:POWer:L2 ............................................................................. 85

:POWer:SET ......................................................................... 85

:POWer:LEVel ...................................................................... 86

:POWer:T1 ............................................................................ 87

:POWer:T2 ............................................................................ 87

PEL-3000 Programming Manual

:POWer:FREquency ............................................................. 88

:POWer:DUTY ..................................................................... 89