TDK-Lambda Z+ series User manual

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

3
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.

4
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.

5
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.






 

6
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

7
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.

8
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

9
: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

10
LIST
:COUN <NR3>
Set the number of times the list is executed before it is completed.
:COUN? Set the number of times the list is executed query
:CURR <NR3> Specifies the output current points in a list.
:CURR? Specifies the output current points in a list query.
:DWEL <NR3>
Specifies the time interval that each point of a list is to remain in effect.
:DWEL?
Specifies the time interval that each point of a list is to remain query.
:LOAD <NR1> Loads from memory LIST type.
:STEP <CRD> Determines if a trigger causes to next point or through all points.
:STEP?
Determines if a trigger causes to next point or through all points query.
:STORe <NR1> Saves data under specified numbers <1..4> of the last LIST typed
:VOLT <NR3> Specifies the output voltage points in a list.
:VOLT ? Specifies the output voltage points in a list query.
STATus
:OPERation Returns the value of the event register
[:EVENt] Returns the value of the condition register
:CONDition? Set current value for trigger pending
:ENABle <NR1> Enables specific bits in the Event register
:ENABle? Enables specific bits in the Event register query
:QUEStionable
[:EVENt] Returns the value of the event register
:CONDition? Returns the value of the condition register
:ENABle <NR1> Enable specific bits in the Event register
:ENABle? Enables specific bits in the Event register query
SYSTem
:ERRor:ENABle Enable Error Message
:ERRor? Read system error. Refer to table 9-6 of Z+ series User Manual
:LANGuage Switch to GEN Language
:REMote
[:STATe] <CDR> Set program communication mode
[:STATe]? Set program communication mode query
:VERSion? Z+ Main software revision
:DATE? Calibration date
:PON:TIME? Operation time from first power on applied

11
TRIGger
[:START] Run trigger
:DELay <NR3> Set trigger delay
:DELay? Set trigger delay query
:SOURce <CRD> Set trigger source
:SOURce ? Set trigger source query
WAVE
:COUN <NR1> Set the number of times that waveform is executed before it is
completed.
:COUN? Set the number of times that waveform is executed before it is
completed query.
:CURR <NR1> This command specifies the output current points in a list.
:CURR? This command specifies the output current points in a list query.
:LOAD <NR1> Loads from memory WAVE type.
:STEP <CRD> Determines if a trigger causes to next point or through all points.
:STEP? Determines if a trigger causes to next point or through all points.
:STORe <NR1> Saves data under specified numbers <1..4> of the last WAVE typed
:TIME <NR1> Set the slope time of the waveform.
:TIME? Set the slope time of the waveform query.
:VOLT <NR3> Specifies the output voltage points in a waveform list.
:VOLT? Specifies the output voltage points in a waveform list query.
GLOBal
:OUTPut
[:STATe] <bool> Set all Power Supply Output On /OFF
:VOLTage
[:AMPLitude] <NR3> Set all Power Supply output voltage
:CURRent
[:AMPLitude] <NR3> Set all Power Supply output current
:*SAV <NR1> Same as *SAV <NR1>
:*RCL <NR1> Same as *RCL <NR1>
:*RST Same as *RST
4.4 Register Structure
Refer to Fig.3-1.
Refer to section 9 of Z+series User Manual.

12
4.5 The Summary Registers
The INSTRUMENT SUMMARY EVENT REGISTER, ISUM1 through ISUM3 (Refer to Fig.3-2), will
record the address of the supply causing an SRQ. These are ‘EVENT’ registers and the bits will
remain set until read by the STAT:QUES:INST:ISUMn command. (Refer to Table 4-1)
Command Description
STATus:QUEStionable
:INSTrument:ISUMmary1? Reads the source of the SRQ in Logical
Z+ Supplies 0 through 13
STATus:QUEStionable
:INSTrument:ISUMmary2? Reads the source of the SRQ in Logical
Z+ Supplies 14 through 27
STATus:QUEStionable
:INSTrument:ISUMmary3? Reads the source of the SRQ in Logical
Z+ Supplies 28 through 30
STATus:QUEStionable
:INSTrument:ISUMmary1:ENABle xx
Enable supplies to cause IEEE SRQ in Logical Z+ Supplies 0 through 13
STATus:QUEStionable
:INSTrument:ISUMmary2:ENABle xx
Enable supplies to cause IEEE SRQ in Logical Z+ Supplies 14 through
27
STATus:QUEStionable
:INSTrument:ISUMmary3:ENABle xx
Enable supplies to cause IEEE SRQ in Logical
Z+ Supplies 28 through
30
STATus:QUEStionable
:INSTrument:ISUMmary1:ENABle?
Read which supplies can cause IEEE SRQ in Logical
Z+ Supplies 0
through 13
STATus:QUEStionable
:INSTrument:ISUMmary2:ENABle?
Read which supplies can cause IEEE SRQ in Logical
Z+ Supplies 14
through 27
STATus:QUEStionable
:INSTrument:ISUMmary3:ENABle?
Read which supplies can cause IEEE SRQ in Logical
Z+ Supplies 28
through 30
Table 4-1: ISUM commands
4.6 Output Queue
Refer to section 9.6.16 of Z+series User Manual.
4.7 Error Messages
Refer to section 9.6.17 of Z+series User Manual.
4.8 Execution Time
Command execution time except for *CLS (150mS) is less than 15 milliseconds.
INST:NSEL 06 11 millisecond
OUTP:STAT ON 12 millisecond
:VOLT 15 10 millisecond
WAVE:TIME 1,1,1,1,1,1,1,1,1,1,1,1 14 millisecond
Query execution time is between 20-50 milliseconds. Response is dependent upon string length.
WAVE:VOLT? 45 millisecond
SYST:ERR? 22 millisecond
*IDN? 38 millisecond
INST:NSEL? 20 millisecond
It is required that the user adds a delay after a command before sending any further messages.
(Refer to Table 4-2)

13
LSB
MSB
STAT:OPER:COND?
STAT?
STAT:OPER:ENAB nnnn
STAT:OPER:ENAB?
SENA nnnn
SENA?
STAT:OPER:EVEN?
SEVE?
Condition Enable Event
Operational Condition
LSB Condition Enable
Standard Event Status
*ESR? *ESE nn
*ESE?
PON _ \_Power On
00User Request
CME _ \_Command Error
EXE _ \_Execution Error
DDE _ \_Device Depandant Error
QYE _ \_Query Error
OPC _ \_Operation Complite
00Not Used
CV _ \_ CV
Constant Voltage
CC _ \_ CCConstant Current
NFLT _ \_ NFLTNo Fault
TWI 0 0Trigger Wait
AST 0 0
Auto Start Enabled
FBE _ \_ FBEFoldback Enable
LSC _ \_ LSCList Step Complite
LOC _ \_ LOCLockal / Remote
OR
UVPE _ \_ UPE
UVP enabled
ILCE _ \_ ILCEInterlock enable
00 0Reserved
CFBM _ \_ FBMCurrent Foldback mode
AVP _ \_ AVP
Analog Voltage Channel
ACP _ \_ ACPAnalog Current Channel
DWE 0 0List Step Active
00 0Reserved
OR
MSB
M E S S A G E
Output Queue
LSB
MSB
STAT:QUES:COND?
FLT?
STAT:QUES:ENAB nnnn
STAT:QUES:ENAB?
FENA nnnn
FENA?
STAT:QUES:EVEN?
FEVE?
Condition Enable Event
AC _ \_ ACAC Fail
OTP _ \_ OTPOver Temperature
FLD _ \_ FLDFoldback (tripped)
OVP _ \_ OVP
Over Voltage Protection
SO _ \_ SOShut Off
OFF _ \_ OFFOutput Off
INT _ \_ INTInterlock
OR
UVP _ \_ UVP
Under Voltage Protection
0_ \_ 0Not used
INPO _ \_ INPOInternal Input Overflow
INTO _ \_ INTOInternal Overflow
ITMO _ \_ ITMO
Internal Time Out
ICOM _ \_ ICOMInternal Comm Error
0_ \_ 0Not used
00 0Not used
NOR
*SRE?
OR
00
0BSY
_ \_SYS
_ \_QUE
_ \_MAV
_ \_ESB
0RQS
_ \_OPR
*SRE nn*STB?
Service Request Enable
Staus byte
Service Request
0 , N o E r r
1 0 2 , S y n t
2 2 2 , D a t a
1 4 1 , I n v a
r
t
e
a
Syst:Err Queue
Command Erroe "Cnn"
Execution Error "Enn"
OR
Language select
Positive Logic
0 = No Event
1 = Event Occured
OR
!nn(SRQ)
7
6
5
4
3
2
0
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Questionable Summary
Message Available
Standard Event Summary
Operation Summary
GEN
SYST ERR?
System Error
Busy
To Instrument Summary register
Fault Registers
Fig.4-1: Status Register and SRQ Tree
ADDRESSED COMMAND/QUERY 10 milliseconds
GLOBAL COMMAND 20 milliseconds
Table 4-2: Addition of Delay

14
Fig.4‐2: Instrument Summary Register Tree for Multi Drop Mode

15
CHAPTER 5: COMMUNICATION EXAMPLE
This section provides an example the National Instruments™ MAX program to communicate with
the Z+.
1. Run National Instruments™ MAX (Measurement & Automation Explorer) program
2. Select “Devices and Interfaces” -> “GPIB0” press Scan for Instruments. Refer to Fig.4-1
3. In the right window, click on Instrument0 and review the device properties. Refer to Fig.4-2
Fig.5-1: Scanning for Instrument
Fig.5-2: Instrument Properties

16
4. Click Communicate with Instrument in the GPIB Explorer toolbar. NI-488.2 Communicator
appears. Refer to Fig. 4-3
5. In the Send String box, *IDN? appears. Click Query. The ID string indicates the model, serial
number, firmware version and the GPIB card firmware version. This will be shown in the text
box below String Received. Refer to Fig.4-3.
Fig.5-3: ID String Query
IA710-04-03A

TDK-Lambda EMEA
www.emea.tdk-lambda.com
Innovating Reliable Power
AD0412 IA710-04-03A
NORTH AMERICA
TDK-Lambda Americas Inc.
3055 Del Sol Boulevard San Diego, CA 92154 U.S.A.
Tel: [phone]
Fax: [phone]
www.us.tdk-lambda.com/lp
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EX 34 8ES United Kingdom
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Tel: [phone]
Fax: [phone]
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CHINA
Shanghai Branch of Wuxi TDK-Lambda Electronic Co. Ltd.
28F, Xingyuan Technology Building No.418, Guiping Road,
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Tel: [phone] Fax: [phone]
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Beijing Branch of Wuxi TDK-Lambda Electronic Co. Ltd.
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Tel: [phone]
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