I-Tech IT6500 Series Operating instructions

Highpowered and
programmable
Switching Power supply
IT6500 Series Programming Guide
Model: IT6512/IT6513/IT6512A/IT6513A/IT6522A/IT6502D
/IT6512D/ IT6532A/IT6533A/IT6523D
Version: 1.0

CHAPTER1 COMMUNICATION INTERFACE.............................................................................................................5
1.1 RS232 INTERFACE.................................................................................................................................................5
1.2 USB INTERFACE ....................................................................................................................................................7
1.3 GPIBINTERFACE...................................................................................................................................................7
1.4 RS485 INTERFACE ................................................................................................................................................7
1.5 LAN INTERFACE (SPECIALIZED INTERFACE FOR MODEL IT6522A/IT6512D )........................................................7
CONNECT THE LAN INTERFACE OF POWER SUPPLY TO THE COMPUTER WITH A RETICLE (CROSSED). ...............................8
CHAPTER2 SCPI COMMAND TABLE.........................................................................................................................9
2.1 IEEE488.2 COMMON COMMANDS.........................................................................................................................9
2.2 SCPI ESSENTIAL COMMANDS................................................................................................................................9
2.3 TRIGGER COMMANDS...........................................................................................................................................10
2.4 OUTPUT COMMANDS............................................................................................................................................10
2.5 COMPOUND CONTROL COMMANDS ......................................................................................................................11
2.6 MEASUREMENT COMMANDS...............................................................................................................................11
2.7 LIST OPERATION COMMANDS (SPECIALIZED FUNCTION FOR MODEL IT6512/6513/IT6532A/IT6533A/IT6523D)
.....................................................................................................................................................................................11
2.8 SEQUENCE OPERATION COMMANDS ....................................................................................................................12
2.9 CALIBRATION COMMANDS..................................................................................................................................12
CHAPTER3 SCPI STATUS REGISTER......................................................................................................................14
CHAPTER4 SCPI COMMAND DESCRIPTION .........................................................................................................16
4.1 IEEE488.2 COMMON COMMANDS........................................................................................................................16
4.2 SCPI ESSENTIAL COMMANDS...............................................................................................................................19
4.3 RELATIVE INFORMATION ABOUT DISPLAY ................................................................................................................27
4.4TRIGGER COMMANDS.............................................................................................................................................27
4.5 OUTPUT COMMAND................................................................................................................................................28
4.6 COMPOSITE CONTROL COMMAND..........................................................................................................................32
4.7 INPUT MEASURING COMMANDS .............................................................................................................................33
4.8 LIST OPERATION COMMANDS(SPECIALIZED FUNCTION FOR MODEL IT6512/6513/IT6532A/IT6533A/IT6523D) 35
4.9 SEQUENCE OPERATION COMMAND........................................................................................................................37
4.10 CALIBRATION COMMANDS....................................................................................................................................38

Safety
Please do not install replacement parts in the instrument, or perform any unauthorized
modification. Please send the instrument to our company's maintenance department for
maintenance, to ensure its security features.
Please refer to the manual for specific information warning or precautions to avoid personal
injury or equipment damage.
There is no part that the operator can maintenance. If maintenance service is required,
please contact a trained service personnel.
Security regulation
To prevent electric shock, non-authorized personnel is strictly not allowed to open the
machine.
This equipment is strictly prohibited for use in life support systems or any other device with
security requirements.
We cannot accept responsibility for any direct or indirect financial damage or loss of profit that
might occur when using the electronic load.
Certification and Quality Assurance
IT6512 programmable DC power supply fully meet all of the technical specification in the
manual.
Warranty
Our Company give one year warranty for the materials and manufacturing of the product
since the date of shipment.
Warranty Service
For the warranty service or repair the product, the product must be returned to the designated
maintenance units. Return the product to us for warranty service, you should pre-pay the
one-way Freight to the maintenance department. and our company is responsible for the
return shipping cost.
If products are returned from other countries for maintenance service, then you should pay all
freight, duties and other taxes.
Limitation of Warranty
The guarantee does not apply to the damage caused by the following conditions:
Improper or inadequate maintenance to the products by customer;
Customers use their own software or interface;
Unauthorized modification or misuse;
Operate this product not in the specified environment, or at the wrong place configuration and
maintenance.
Damage from Customer self-installation of circuit, or defects due to customers use their
products.
Product model or serial number of the fuselage has been altered, deleted, removed or made
illegible;

Damage caused by accidents including but not limited to lightning, water, fire, abuse or
neglect.
Notice
If the contents of this manual is subject to change, we will not notice additionally

Chapter1 Communication interface
IT6512/IT6513/IT6512A/IT6513A/IT6522A/IT6502D/IT6512D power supply have four
standard communication interfaces: RS232,USB,GPIB,RS485. And IT6522A/IT6512D also
have Ethernet interface. IT6532A/IT6533A/IT6523D power supply have four standard
communication interfaces: RS232/USB/GPIB/Ethernet. You can choose any one according to
his demands.
1.1 RS232 interface
Using a cable with two COM ports to connect power supply and PC.Then please press
+ (Menu) button to enter the menu to configure the communication parameters.
You could do the secondary development with all SCPI commands.
Note：The setup about RS232 in the program should agree with the configuration in the
system set.If you want to change the communication parameters, please press +
(Menu) button to enter the system set.
RS-232 Data style
RS232 is a 10-bit data with start bit and stop bit.The start bit and stop bit can’t be
edited.While you could select the odd parity or even parity under the system set.
Odd or EVEN options have been saved in the nonvolatile memory.
Baudrate
Edit baudrate:press +(Menu) to enter the menu setup,you could select the
baudrate among the following options:
4800 9600 19200 38400 57600 115200
RS-232 connection
Please use a straight-through RS232 cable with DB-9 interface and connect the RS232
serial port with the controller’s serial port(for example,PC). Form 2-2 give a detailed
description for each pin.
If your computer is using a RS232 interface with a DB-25 connector, you need a cable
and a adaptor with a DB-25 connector at one end and DB-9 connector at the other end(not a
null modem).

RS-232 pins description
Pin description
1 connectionless
2 TXD,transmit data
3 RXD,receive data
4 connectionless
5 GND
6 connectionless
7 connectionless
8 connectionless
9 connectionless
RS-232 Troubleshooting：
If you meet some problems when communicating with PC by RS232 interface, please check
the following items:
Please check the parameters setting
PC and power supply must have the same configuration in the following items: baudrate,
parity bit,data bit and flow control.Please note that power supply has been configured with a
start bit and stop bit(the two values are fixed).
Check the cable
Ensure you have used the correct communication cable.Please pay attention that some
cable may not have a correct internal wiring even it is with a appropriate DB9 interface.
The RS232 communication cable should have been connected to a correct serial port of
the PC(COM1,COM2,ext).
Communication Setup
Please ensure the PC and power supply have the same configuration in the following
items.
baudrate：9600(4800、9600、19200、38400、57600、115200).You could enter the system
menu to set the baudrate.
Data bit：8
Stop bit：1
Parity bit：(none,even,odd)
EVEN 8 data bits have even parity

ODD 8 data bits have odd parity
NONE 8 data bits have no parity
Native machine address：（ 0 ～31，factory default is 0）
Parity=None Start Bit 8 Data Bits Stop Bit
1.2 USB interface
Use a cable with two USB ports to connect power supply and PC.You can program through
USB interface to achieve all functions of power supply.
The functions of USB488 interface are as follows:
Interface is 488.2 USB488 interface
Receive the following request: REN_CONTROL, GO_TO_LOCAL, and
LOCAL_LOCKOUT
When the interface receives MsgID = TRIGGER USBTMC command,it will transmit
the TRIGGER command to the function layer
The functions of power supply’s USB488 are as follows:
receive all SCPI commands
device is SR1 enabled
device is RL1 enabled
device is DT1 enabled
1.3 GPIB Interface
Use a IEEE488 bus to connect GPIB interfaces of power supply and PC.Please ensure
that the screws have been screwed down in order to have a full connection.Then press
+(Menu) to enter the system menu to set the address.The address range of
power supply is 0-31.After you set the address,please press button to confirm.GPIB
address is saved in nonvolatile memory.
1.4 RS485 Interface
Use a straight-through cable with two RS485 ports to connect power supply and PC.
Press + (Menu) button to enter the system set.Please set the following
parmeters:baudrate,data bit,stop bit,parity bit,native machine address.The setting way is the
same with RS232 setting.
The definition for each pins of RS485:
1. Pin1 is B line of RS485 interface
2. Pin5 is A line of RS485 interface
3. The other pins are suspended
1.5 LAN Interface (Specialized Interface for model IT6522A/IT6512D )

Press +(Menu) button to enter the system set. Please select
“ETHERNET” in the Communication from System and then configure Gateway, IP,
Mask and SocketPort in the LAN option.
Connect the LAN interface of power supply to the computer with a reticle (crossed).

Chapter2 SCPI command table
2.1 IEEE488.2 Common commands
*CLS
*ESE
*ESE?
*ESR?,
*IDN?,
*OPC,
*OPC?,
*RST,
*PSC
*PSC?
*SRE,
*SRE?,
*STB?,
*TRG,
*SAV ,
*RCL,
2.2 SCPI essential commands
STATus:QUEStionable
[:EVENt]?
:CONDition?
:ENABle <n>
:ENABle?
:PTRansition {<NR1>}
:PTRansition?
:NTRansition {<NR1>}
:NPTRansition?
:OPERation
:EVENt]?
: CONDition?
:ENABle <NR1>
:ENABle?
:PTRansition {<NR1>}
:PTRansition?
:NTRansition {<NR1>}
:NPTRansition?
SYSTem :ERRor?
:VERSion?

:REMote
:LOCal
:RWLock
:POSetup {<RST | RCL0>}
:POSetup?
:CLEar?
:BEEPer
:BEEPer?
:COMMunicate:GPIB:RDEVice:ADDRess
:COMMunicate:GPIB:RDEVice:ADDRess?
:INTerface
CONFigure
:SAVe
Address
2.3Trigger commands
TRIGger[:IMMediate]
:SOURce {<source>}
:SOURce？
2.4Output commands
[SOURce:]
OUTPut
[:STATe] {<bool>}
[:STATe]?
RISe [:LEVel]
[:LEVel]?
FALL [:LEVel]
[:LEVel]?
CURRent
[:LEVel] [:IMMediate] [:AMPLitude]
[:AMPLitude]?
:TRIGgered [:AMPLitude]
[:AMPLitude]?
VOLTage

[:LEVel] [:IMMediate] [:AMPLitude]
[:AMPLitude]？
:TRIGgered [:AMPLitude]
[:AMPLitude]?
:PROTection [:LEVel]
[:LEVel]？
:DELay
:DELay？
:STATe
:TRIGgered?
:CLEar
:LIMit [:LEVel]<voltage level>
[:LEVel]?
:RANGe< voltage level >
:RANGe?
2.5Compound control commands
[SOURce:] APPLy
APPLy?
2.6Measurement commands
MEASure[:SCALar] :VOLTage[:DC]?
:CURRent[:DC]?
:POWer[:DC]?
FETCh :VOLTage?
:CURRent?
:POWer?
SENSe
:AVERage :COUNt
:COUNt?
2.7 List operation commands (Specialized function for model

IT6512/6513/IT6532A/IT6533A/IT6523D)
LIST :STATe
:STATe?
:RECall
:RECall?
:EDIT
:EDIT?
:POWer
:POWer?
:REPeat
:REPeat?
:LINK :SEQuence
:SEQuence?
:SEQuence
:REPeat<NR1><，NR1>
:REPeat? <NR1>
:SAVe
2.8 Sequence operation commands
SEQuence
:EDIT
:EDIT?
:STEP
:ACTive
:ACTive?
:VOLTage
:VOLTage?
:CURRent
:CURRent?
:WIDTh
:WIDTh?
:SLOPe
:SLOPe?
:SAVe
2.9Calibration commands
CALibration
:SECure
[:STATe] {<0|1ON|OFF>,<quoted code>}
[:STATe]?

:VOLTage
: LEVel {<P1 | P2> }
[:Datal] {<numeric value>}
:CURRent
:LEVel {< P1 | P2> }
[:Data] {<numeric value>}
:STRing
:STRing?
:INITitialize
:SAVe

Chapter3 SCPI status register
You can get the current status of the power supply by reading the operation status
registers. The power supply records the different status of the instrument through the four
status register group，the four status register group are: status byte register, standard event
register, query status register and operation status register. Status byte register records the
information of the other status register
BIT
Signal
Meaning
0
3
4
5
CAL
WTG
CV
CC
Operation status register
The power supply is calculating the new calibration parameter.
The power supply is waiting for the trigger information.
The power supply is in constant voltage status.
The power supply is in constant current status.
0
1
3
4
OV
OC
OP
OT
Query status register
Over voltage
Over current
Over power
Over temperature
0
2
3
4
5
7
OPC
QYE
DDE
EXE
CME
PON
Standard event register
Operation completed. All the parallel operations are completed.
Query error. Output buffer data lost.
Instrument memory data loss or self test error
Execute error. Command parameter over flow or the operation
condition is not consistent
Command error. There is syntax or semantic error in the command
received.
Power on bit, this bit is set to 1 after power on
2
3
4
5
6
7
EAV
QUES
MAV
ESB
RQS
OPER
Status byte register
Error buffer available
This bit is set to 1 when any one status of enabled query status register
changes.
Output buffer available
Bit ESB is set to 1 when the status of a enabled standard event status
register changes
If the status of enabled operation register changes,then this bit is set
to1.
The following chart is the Status register Structure of the power supply:

QUESTIONABLE STATUS register
CONDITION PTR/NTR EVENT ENABLE
OV
OT
Unr
OP
OT
n.u
n.u
n.u
Error Queue
OPERATION STATUS REGISTER STATE BYTE REGISTER
CONDITION PTR/NTR EVENT ENABLE EVENT ENABLE
CAL n.u
n.u n.u
WTG EAV
CV QUES
CC MAV
n.u ESB
n.u RQS
n.u OPER
Output Buffer
STANDARD EVENT REGISTER
EVENT ENABLE
OPC
n.u
QYE
DDE
EXE
CME
n.u
PON
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
L
O
G
I
C
O
R
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
L
O
G
I
C
O
R
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
L
O
G
I
C
O
R
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
L
O
G
I
C
O
R
Data
Data
Data
Err
Err
Err

Chapter4 SCPI Command description
4.1 IEEE488.2 common commands
*CLS
This command clears the following registers：
Standard event register
Query event register
Operation event register
Status byte register
Error code
Command syntax：*CLS
Parameter: None
*ESE
This command can set the parameter of standard event enable register. Setting parameter
can determine which bit of standard event register is 1 and the byte will enable ESB of status
byte register is 1.
Command syntax：*ESE <NR1>
Parameter: 0~255
The value when power on：Refer to *PSC command
Example：*ESE 128
Query syntax：*ESE？
Returned parameter：<NR1>
The bit definition of the standard event enabled register：
Bit Position 7 6 5 4 3 2 1 0
Bit name PON not used CME EXE DDE QYE not used OPC
Bit weight 128 32 16 8 4 1
PON Power-on
CME Command error
EXE Execution error
DDE Device-dependent error
QYE Query error
OPC Operation complete
*ESE?

This command is used to read the standard event register
Query syntax：*ESE？
Parameter: None
Returned parameter：<NR1>
*ESR?
This command can read the value of standard event status register. After executing this
command, standard event status register is reset. Bit definition of standard event status
register is as the same as the standard event status enable register
Query syntax：*ESR？
Parameter: None
Returned parameter：<NR1>
*IDN?
This command can read information about power supply. The returns parameter contains 4
segments divided by comma.
Query syntax：*IDN？
Parameter: None
Returned parameter：<AARD> segment description
ITECH Ltd Manufacturer
6512 Product model
XXXXXX Product serial number
VX．XX –VX．XX Software version
Example：ITECH，6512，00000000000004，V1.01-V1.00
*OPC
When all commands before this command are executed, bit OPC in standard event register
will be set to 1.
Command syntax：*OPC
Parameter: None
Query syntax：*OPC？
Returned parameter：<NR1>

*RST
This command reset the power supply to default settings.
OUTP OFF CURR MIN
VOLT:PROT MAX VOLT MIN
Command syntax：*RST>
Parameter: None
*SRE
This command can set the parameter of state byte enable register. Setting parameter can
determine which byte value of state byte register is 1 and the byte will set RQS of state byte
register to 1. Bit definition of state byte enable register is as the same as the state byte
register.
Command syntax：*SRE <NR1>
Parameter:0~255
Query syntax：*SRE？
Returned parameter：<NR1>
*STB?
This command can read the data from status byte register.
Query syntax：*STB？
Parameter: None
Returned parameter：<NR1>
*TRG
When power supply trigger source is a command from via BUS, this command will give a
trigger signal. And its function is the same as “TRIGger” command.
Query syntax：*TRG
Parameter: None
Returned parameter：None
*SAV
This command can save the current setups of power supply to specified memory. These
setups contains current setups, voltage setups, max voltage set, min voltage set, OVP set,
OVP timer, OPP set, voltage rise and fall time, analog interface and series and parallel set.
The memory can divided into 10 groups, each contains 0~9 setups. So IT6512 can save 100
Setups in all.

Command syntax：*SAV<NRf>〉
Parameter: 0~9
*RCL
This command can recall the setups you saved before from the specified memory.
Command syntax：*RCL<NRf>
Parameter: 0~9
4.2 SCPI essential commands
STATus:QUEStionable[:EVENt]?
This command can be used to read the value in query event register. After executing this
command, the query event register will be cleared.
Query syntax：STATus:QUEStionable[:EVENt]?
Parameter: None
Returned parameter：<NR2>
Relative command：STATus:QUEStionable:ENABle
The bit definition of query event enable register：
Bit position 15 14 13 12 11 10 9 8
Bit name no use no use no use no use no use no use no use no use
Bit weight
Bit position 7 6 5 4 3 2 1 0
Bit name no use no use no use OT OP no use OC OV
Bit weight 16 8 2 1
STATus:QUEStionable:CONDition?
This command is used to read the value of query condition register. When a bit of quest
condition changes, the bit value corresponding in quest event register is 1.
Query syntax：STATus:QUEStionable: CONDition?
Parameter:None
Returned parameter：<NR2>
STATus:QUEStionable:ENABle
This command can set the parameter of quest event enable register. Setting parameter can
determine which bit value of quest event register is 1 and the bit will enable QUES

Command syntax：STATus:QUEStionable:ENABle <NR2>
Parameter:0~65535
Default set：Refer to *PSC command
Example：STATus:QUEStionable:ENABle 128
Query syntax：STATus:QUEStionable:ENABle？
Returned parameter：<NR2>
STATus: QUEStionable:NTRansition
This command is used to edit the negative transition trigger register of operation event. The
parameter determines which bits of operation event register is 1 will cause the OPER of
status byte register to be 1.
Command syntax：STATus: QUEStionable:NTRansition <NR1>
Parameter:0~255
Example：STATus: QUEStionable:NTRansition 128
Query syntax：STATus: QUEStionable:NTRansition？
STATus: QUEStionable:PTRansition
This command is used to edit the positive transition trigger register of operation event. The
parameter determines which bits of operation event register is 1 will cause the OPER of
status byte register to be 1.
Command syntax：STATus: QUEStionable:PTRansition <NR1>
Parameter:0~255
Example：STATus: QUEStionable:PTRansition 128
Query syntax：STATus: QUEStionable:PTRansition？
STATus:OPERation[:EVENt]?
This command can read the parameter from operation event register. After executing this
order, operation event register is reset.
Query syntax：STATus: OPERation [:EVENt]?
Parameter: None
Returned parameter：<NR1>