TDK-Lambda Z+ series Manuale utente

Programmable DC Power Supplies

200W/400W/600W/800W in 2U

Built-in USB, RS-232 & RS-485 Interface

Series

User Manual

Optional Interface:

IEEE488.2 SCPI (GPIB) Multi-Drop

USER MANUAL FOR

IEEE Programming Interface

POWER SUPPLIES

Manual Supplement

Refer to the Z+Technical Manual for information on installing the power supply,

safety requirements, specifications, operating the front panel, using the serial

RS-232/485, USB programming and the analog programming.

IA710-04-03A

Table of Contents

INTRODUCTION ...........................................................................................................3

SCOPE OF MANUAL .....................................................................................................3

CHAPTER 1: THE IEEE-488.2 INTERFACE....................................................................3

CHAPTER 2: CONNECTION

2.1 Point to Point ...................................................................................................................................... 4

2.2 Multi Drop............................................................................................................................................ 4

2.2.1 Selecting One Power Supply in a Multi Drop Chain............................................................................4

2.3 Communication Cables................................................................................................................... 4

CHAPTER 3: CONFIGURATION

3.1 Configuration the IEEE Controller................................................................................................ 5

3.2 Configuration the Power Supply................................................................................................. 5

3.2.1 To Select the Communication Interface .....................................................................................................5

3.2.2 To Select the Address.............................................................................................................................................6

3.2.3 To Select the Baud Rate 57600. (485 Interface only)............................................................................6

3.2.4 To Select the Communication Language SCPI. (485 interface only).........................................6

CHAPTER 4: PROGRAMMING COMMANDS

4.1 SCPI Protocol ...................................................................................................................................... 7

4.2 SCPI Common Commands............................................................................................................. 7

4.3 SCPI Subsystem Commands.......................................................................................................... 8

4.4 Register Structure............................................................................................................................. 12

4.5 The Summary Registers................................................................................................................. 12

4.6 Output Queue ................................................................................................................................... 12

4.7 Error Messages .................................................................................................................................. 12

4.8 Execution Time ................................................................................................................................. 12

CHAPTER 5: COMMUNICATION EXAMPLE................................................................15

INTRODUCTION

The internal factory installed General Purpose Interface Bus (GPIB) allows operation of the Z+ Power

Supply from a computer via IEEE-488.

The interface allows the user complete remote control of the Power Supply, including output

voltage and current setting and monitoring, protection setting, trigger, waveform list operation,

Power Supply status and SRQ reporting.

CommunicationovertheGPIB interface meetsIEEE488.2 standardsfor ProgrammableInstrumentation

(SCPI) compliant.

SCOPE OF MANUAL

This manual contains the information needed to operate the optional embedded IEEE(GPIB)

Interface used in the Power Supply. It includes the following:

•A general description of the GPIB.

•Connection.

•Configuration.

•Listing and description of SCPI command.

•Communication Example.

CHAPTER 1: THE IEEE-488.2 INTERFACE

The IEEE-488 digital programming interface (also called the GPIB interface) is a popular way to

connect instruments to a computer. It uses a specialized 24-pin cable with connectors that allow

cables to be ‘stacked’ together. There are eight data wires; eight control wires and eight ground

wires. If the system runs from a personal computer, there are numerous vendors of IEEE controller

cards and software.

The IEEE-488 standard has gone through several upgrades. The IEEE-488.1 focused on the

handshaking of the eight control lines.The IEEE-488.2 added status registers inside each instrument

and it added common commands to make programming groups of instruments easier. The latest

specification, SCPI, adds guidelines for the command syntax so one vendor’s Power Supply will

use the same commands as another’s. The Interface follows all of these standards.

Because many instruments may be connected and independently controlled by a single IEEE

controller, each instrument must have a unique address. The IEEE controller automatically sets

its address equal to the Power Supply address.

For complete and specific information, refer to the following documents: ANSI/IEEE Std 488.1-1987

IEEE Standard Digital Interface for Programmable Instrumentation and ANSI/IEEE Std 488.2-1987

IEEE Standard Codes, Formats, Protocols and Common Commands.

CHAPTER 2: CONNECTION

This section provides information on variable IEEE (GPIB) connection modes, communication

cables and selecting communication parameters for operation via IEEE (GPIB) interface.

It is possible connect to IEEE (GPIB) interface in two ways.

2.1 Point to Point

One IEEE Interface can control only one Z+Power Supply. Refer to Fig.2-1. Each Power Supply must

be configured for IEEE communication interface. Each unit must have a unique address, ranging

from 01 to 31. Baud rate and address are automatically fixed to “57600" and "SCPI".

2.2 Multi Drop

One IEEE Interface can control more than one Z+Power Supply. A maximum of 30 Z+units can be

connected via RS485 interface to a Power Supply with the installed IEEE option. Refer to Fig.2-2.The

Power Supply connected to a PC via the GPIB cable must be configured for an IEEE communication

interface, the other must be configured for a RS485 interface. Each unit must have a unique address,

ranging from 01 to 31. IEEE module gets the address of the unit into which it is installed. For RS485

interface set Baud rate at “57600" bps and Communication Language to "SCPI".

2.2.1 Selecting One Power Supply in a Multi Drop Chain

All the SCPI commands may be sent to any one of the Power Supplies in an RS-485 chain by first

sending the INST:nSEL address command. All commands and queries will then apply only to

the selected Power Supply, until a new INST:nSEL is sent.

At power-up, the IEEE master Power Supply is automatically the one selected.

After sending INST:nSEL, it is recommended that you verify the command by sending INST:nSEL?,

otherwise the following commands may be sent to the wrong Power Supply.

Fig.2-1: Point To Point Connection Fig.2-2: Multi Drop Connection

2.3 Communication Cables

•GPIB cable - Use standard IEEE-488, 26 AWG GPIB cable up to 3 meters in length.

•RS485 link cable - Use serial link cable with RJ-45 shielded connectors (P/N: GEN/RJ45). Refer

to Z+Series User Manual Fig.7-8.

CHAPTER 3: CONFIGURATION

3.1 Configuration the IEEE Controller

A typical IEEE controller is a personal computer with an IEEE interface card. Each card vendor

supplies its own configuration instructions and interface software.

Each time the software is executed, the controller is configured as follows:

•Controller Address = Power Supply address.

•Serial bus Baud Rate = 57600

•SCPI protocol.

•EOI Flag = TRUE. The “End or Identify” is a control line in the IEEE cable that is initiated when

the last character of a message string is sent. It is not supported by this interface.

•EOS Flag = FALSE: The “End of String”, used in some instruments to indicate the last character

of a message. It is required for this interface.

Fig.3-1: Front Panel Fig.3-2: Rear Panel

1. AC ON/OFF Switch

2. REM LED/Buttom

3. Voltage Encoder

4. Voltage Display

5. Current Encoder

6. Current Display

7. RS-232/RS-485 INPUT Remote Serial Programming

8. RS-485 OUTPUT to other Z+Power Supplies

3.2 Configuration the Power Supply

Refer to Fig.3-1.

3.2.1 To Select the Communication Interface

1. Press REM button. The LED is illuminated. “IN t F " appears on Voltage display.

2. Press Voltage Encoder. Existing communication mode appears on Current display.

3. Turn Current Encoder until desired message appears; "I" (for unit with IEEE option) or "5".

4. To select desired parameter press Current encoder.













 

3.2.2 To Select the Address

1. Press REM button. The LED is illuminated. “Adr" appears on Current display.

2. Press Current Encoder. Existing address mode appears on Current display.

3. Turn Current Encoder until desired address appears.

4. To select desired address press Current encoder.

3.2.3 To Select the Baud Rate 57600. (485 Interface only)

1. Press REM button. The LED is illuminated. “IN t F " appears on Voltage display.

2. Turn Voltage Encoder until "baUd" message appears on Current display

3. Press Current Encoder. Existing Baud Rate appears on Current display.

4. Turn Current Encoder until "57600" appears.

5. To select desired Baud Rate press Current encoder.

3.2.4 To Select the Communication Language SCPI. (485 interface only)

1. Press REM button. The LED is illuminated. “IN t F " appears on Voltage display.

2. Turn Voltage Encoder until "La nG" message appears on Current display

3. Press Current Encoder. Existing Language appears on Current display.

4. Turn Current Encoder until "SCPI" appears.

5. To select desired Language press Current encoder.

For more information refer to section 4 of Z+series User Manual

CHAPTER 4: PROGRAMMING COMMANDS

Communication over the GPIB interface meets IEEE 488.2 standards and is Standard Commands

for Programmable Instrumentation (SCPI) compliant.

4.1 SCPI Protocol

Refer to section 7.10 of Z+series User Manual

4.2 SCPI Common Commands

Common commands are used to control instrument status registers, status reporting, synchronization,

data storage, and other common functions.

*CLS Clear Status command. Clears the entire status structure.

*ESE <NR1> Standard Event Status Enable command.

*ESR? Standard Event Status Register query.

*IDN? Identification query.

*OPC Operation Complete command.

*OPC? Operation Complete query.

*OPT? Returns a string identifying internal options.

*PSC <bool> Power-On Status Clear (PSC).

*RCL <NR1> Restores the Power Supply to a state previously stored in memory.

*RST Resets the Power Supply to a defined state.

*SAV <NR1> The SAV command saves all applied configuration setting.

*SRE <NR1> Service Request Enable command.

*STB? Status Byte query. Returns the contents of the Status Byte Register.

*TRG Command starts the waveform when the trigger source is set to BUS.

ABORt Resets the trigger system and places the Power Supply in an IDLE state.

For more information refer to section 7.11 of Z+series User Manual.

4.3 SCPI Subsystem Commands

Subsystem commands control all Z+functions. For a full command description refer to section

7.12 in Z+series User Manual. Short list of Z+series commands:

OUTPut

[:STATe] <bool> Enable/Disable output

[:STATe]? Enable/Disable output query

:PON

[:STATe] <bool> Set power-on state in Safe or Auto start

[:STATe]? Power-on state in Safe or Auto start query

:PROTection

:CLEar Reset latched protection

:FOLDback

[:MODE] <CRD> Protection at transition CC<->CV modes

[:MODE]? Protection at transition CC<->CV modes query

:DELay <NR3> Delay before protection activated

:DELay? Delay before protection activated query

:ILC

:MODE <CRD> Set remote inhibit input (ENAble|DISable)

:MODE? Set remote inhibit input query

:TTLTrg

:MODE <CRD> Set or disable Function Strobe Mode

:MODE? Function Strobe Mode query

:RELay

[:STATe] <bool> Set programming pin status

[:STATe]? Programming pin status query

:MODE? Replay operation mode CV/CC/OFF

INSTrument

:COUPle <CRD> Couple for all

Z+

power supplies

:NSELect <NR1> Select the Power Supply to remote operation

:NSELect? Selected Power Supply

VOLTage

[:LEVel]

[:IMMediate]

[:AMPLitude] <NR3> Set output voltage

[:AMPLitude]? Set output voltage query

:TRIGger <NR3> Set current value for trigger pending

:TRIGger? Set current value for trigger pending query

:PROTection

:LEVel <NR3> Set OVP value

:LEVel? Set OVP value query

: LOW

:STATe <CRD> Set UVP or UVL mode

:STATe? Set UVP or UVL mode query

:[LEVel] <NR3> Set UVP|UVL value

:[LEVel]? Set UVP|UVL value

:CLEar

:MODE <CRD> Set arbitrary trigger control mode

:MODE? Set arbitrary trigger control mode query

CURRent

[:LEVel]

[:IMMediate]

[:AMPLitude] <NR3> Set output Current

[:AMPLitude]? Set output Current query

:TRIGger <NR3> Set current value for trigger pending

:TRIGger? Set current value for trigger pending query

:MODE <CRD> Select arbitrary trigger control mode

:MODE? Select arbitrary trigger control mode query

MEASure

:CURRent[:DC]? Reads the measured output current.

:VOLTage[:DC]? Reads the measured output voltage.

:POWer[:DC]? Reads the measured output power.

DISPlay

[:WINDow]:STAT <bool> Display ON/OFF

[:WINDow]:FLASh <bool> Display Flash ON/OFF

INITate

[:IMMediate] Enables the trigger subsystem.

:CONTinuous <bool> Trigger system is continuously enabled/disabled

:CONTinuous? Trigger system is continuously enabled/disabled

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