Faithtech FTG Series Owner's manual

Programmable DC Switching Power Supply
Programming Manual
( FTG Series )
©Copyright Faithtech
Version V2.02
2020-04

I
Preface
This manual contains reference information for programming the FTG series
programmable switching DC power supply Unit (PSU, i.e. Power Supply Unit) over the
remote interface using the SCPI programming language.
Related Information
The applications in this manual assume that you know how to connect the power supply
to the computer. Please refer to the user manual for the specific online method.
Part of the content in the manual is related to specific accessories. If you need some
special accessories or the accompanied accessories are not enough to meet your needs,
please contact Faithtech Technology sales or after-sales service department.
Announcement
Faithtech Technology owns the copyright and final interpretation right of this manual. The
information contained in the manual is for reference only and is subject to change without
notice. Faithtech Technology is not responsible for the errors that may be contained in this
manual or the damage caused by the provision, execution and use of this manual.
For product latest information, please log on to Faithtech's official website
http://www.faithtech.cn for inquiries.
Version History
Date
Version
Amendment
2016-03
1.00
Complete this manual
2019-04
1.01
Correction of certain examples
2020-04
2.02
Revise and append some prgramming examples

II
Table of Contents
1. Communication Interface...................................................................................................... １
1.1. Introduction......................................................................................................................１
1.2. Configure communication interface............................................................................. １
Connect RS232................................................................................................................ ２
Connect LAN....................................................................................................................２
Connect GPIB...................................................................................................................３
1.3. Switching protocol...........................................................................................................３
1.4. Enter remote control mode............................................................................................３
1.5. Others................................................................................................................................４
2. SCPI Status Registers............................................................................................................... ５
2.1. Command introduction.................................................................................................. ５
2.2. Program syntax................................................................................................................ ５
Command keyword........................................................................................................ ６
Root Specifier.................................................................................................................. ６
Command separators.....................................................................................................６
Query syntax....................................................................................................................７
Command terminator.....................................................................................................７
2.3. Paramter Format.............................................................................................................. ８
2.4. Status system....................................................................................................................８
Channel Status Register Group.....................................................................................９
Standard Event Status Register Group.....................................................................１０
Status Byte Register....................................................................................................１０
2.5. Command version information..................................................................................１１
3. SCPI Command Description...............................................................................................１２
3.1. IEEE488.2 common command reference................................................................. １２
*CLS...............................................................................................................................１２
*ESE............................................................................................................................... １３
*ESR?.............................................................................................................................１３
*IDN?.............................................................................................................................１３
*OPC..............................................................................................................................１３
*PSC.............................................................................................................................. １４
*RST...............................................................................................................................１４
*SRE...............................................................................................................................１４
*STB?.............................................................................................................................１５
*SAV.............................................................................................................................. １５
*RCL...............................................................................................................................１５
*TST?............................................................................................................................. １６
*WAI.............................................................................................................................. １６
3.2. CONFigure command................................................................................................. １７
CONFigure:FOLD:BACK.............................................................................................. １７
CONFigure:FOLD:TIME............................................................................................... １７
CONFigure:APG:MODE...............................................................................................１７

III
CONFigure:APG:VOLTage...........................................................................................１７
CONFigure:INHibit......................................................................................................１８
CONFigure:AUTO:LOAD............................................................................................. １８
CONFigure:AUTO:OUTPut..........................................................................................１８
3.3. OUTPut command....................................................................................................... １９
OUTPut[:STATe]............................................................................................................１９
OUTPut:FUNCtion....................................................................................................... １９
OUTPut:PROTect:VOLTage......................................................................................... １９
OUTPut:PROTect:CURRent......................................................................................... １９
OUTPut:PROTect:POWer............................................................................................ ２０
OUTPut:PROTect:CLEar............................................................................................... ２０
3.4. SOURce command.......................................................................................................２０
SOURce:VOLTage[:LEVel]............................................................................................２０
SOURce:VOLTage:LIMit:HIGH.................................................................................... ２０
SOURce:VOLTage:LIMit:LOW..................................................................................... ２１
SOURce:CURRent[:LEVel]............................................................................................２１
SOURce:CURRent:LIMit:HIGH....................................................................................２１
SOURce:CURRent:LIMit:LOW.....................................................................................２２
3.5. SEQuence command...................................................................................................２２
SEQuence:STATus........................................................................................................ ２２
SEQuence:RUN:NUMBer............................................................................................２２
SEQuence:EDIT:NUMBer............................................................................................ ２２
SEQuence:EDIT:COUNt...............................................................................................２３
SEQuence:EDIT:CYCLe................................................................................................ ２３
SEQuence:EDIT:LINK................................................................................................... ２３
SEQuence:EDIT:SAVE.................................................................................................. ２３
SEQuence:EDIT:STEP...................................................................................................２４
SEQuence:EDIT:VOLTage............................................................................................２４
SEQuence:EDIT:CURRent............................................................................................２４
SEQuence:EDIT:DELay.................................................................................................２４
3.6. CP command................................................................................................................ ２５
CP:VOLTage..................................................................................................................２５
CP:CURRent..................................................................................................................２５
CP:POWer.....................................................................................................................２５
CP:RESPonse................................................................................................................ ２５
3.7. MEASure command.....................................................................................................２６
MEASure:VOLTage?.....................................................................................................２６
MEASure:CURRent?.................................................................................................... ２６
MEASure:POWer?........................................................................................................２６
MEASure:TEMPerature?..............................................................................................２６
3.8. STATus command.........................................................................................................２７
STATus:CHANnel:CONDition?....................................................................................２７
STATus:CHANnel[:EVENt]?..........................................................................................２７
STATus:CHANnel:ENABle............................................................................................２７

IV
3.9. SYSTem command....................................................................................................... ２７
SYSTem:ERRor?............................................................................................................ ２７
SYSTem:LOCal.............................................................................................................. ２８
SYSTem:VERSion?........................................................................................................２８
4. SCPI error information........................................................................................................２９
4.1. Introduction..................................................................................................................２９
4.2. Check error information............................................................................................. ２９
4.3. Command errors..........................................................................................................２９
4.4. Execution errors........................................................................................................... ３１
4.5. Query errors................................................................................................................. ３１
5. Programming example....................................................................................................... ３２
5.1. VI static output.............................................................................................................３２
5.2. Query measurement parameter................................................................................ ３２
5.3. Edit SEQ file.................................................................................................................. ３２
5.4. Run SEQ File................................................................................................................. ３３
5.5. Constant power (CP) output...................................................................................... ３３

FTG Series Programming Manual
_________________________________________________________________
１
1. Communication Interface
1.1. Introduction
Faithtech FTG series programmable DC switching power supply provides various remote
communication interfaces such as RS232 port (standard), LAN (standard), GPIB (optional), etc..
You can connect to the power supply through a dedicated cable with the computer, the
computer can control the source.
Table 1-1 Communication Interfaces
Remote Controller
Interface
Explanation
PC
RS232
Universal serial port
LAN
Standard ethernet
◎Caution:
You can only select one communication method at a time. Default is RS232.
1.2. Configure communication interface
This section describes in detail the configuration method of each communication interface. These
configurations can only be set via the front panel keyboard of the power supply. For more
detailed configuration introduction, please refer to the user manual. Press the "Menu" key to
enter the menu, under the "System" column, select the "Communication" item, and press the
"Enter" key to enter the communication configure interface.
Figure 1-1 Communication Configure Interface
Use the knob or direction keys to move the cursor to the setting item, and press the "Enter"

FTG Series Programming Manual
_________________________________________________________________
２
key to enter the parameter editing mode. Enter the number keys and decimal point keys to
edit the IP address, and turn the knob to select the baud rate and verification mode. The
user presses the "Enter" key to confirm the editing parameters, presses the "Esc" key to exit.
The communication configuration information is stored in the instrument internal
non-volatile memory, and the configuration will not be affected by shutting down or
recalling the preset settings. After changing the communication parameters, the device
needs to be restarted for the changes to take effect.
Connect RS232
The serial port is a universal asynchronous serial communication interface that conforms to
the RS232 level specification and does not support any flow control. RS232 uses 9600 baud
rate by default, which can be set to 4800, 19200, 38400 or 115200bps. The baud rate of the
power supply and the computer must be the same. The factory default parity is off (no
check). If the parity is enabled, the RS232 interface will use odd or even parity to verify data.
For the RS232 interface, only TxD and RxD signals can transmit data, and the pin signals are
described in the following table.
Table 1-2 RS232 PIN signal
Pin NO.
Input/Output
Description
1
---
N.C.
2
Input
RxD
3
Output
TxD
4
---
DSR
5
---
GND
6
---
DTR
7
---
CTS
8
---
RTS
9
---
N.C.
Connect LAN
The FTG series power supply has an Ethernet communication interface, adopts UDP
communication mode, and the default port number is 7000. Before starting communication,
the user needs to set the IP address and subnet mask, and ensure that the address of the PC

FTG Series Programming Manual
_________________________________________________________________
３
and the power supply are in the same network segment, and that there is no duplicate IP
address with the power supply in the network segment, otherwise the connection will not be
correct.
Connect GPIB
GPIB interface and IEEE488.2 GPIB connection cable are optional accessories, please contact
authorized sales agent or Faithtech in case of need.
Use a IEEE488.2 GPIB cable 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” button to enter the system menu to set the address. GPIB address is saved in
nonvolatile memory.
1.3. Switching protocol
FTG series support SCPI and Modbus-RTU protocol, select the correct protocol base on
your requirements.
◎Caution:
Restart the power supply after you changed the protocol, so as to let the changes take
effect.
1.4. Enter remote control mode
After the power supply receives any correct SCPI command, it enters the remote control
mode.
In the remote control mode: the local keyboard is locked, the key operation is invalid, and
the power can only be controlled by programming commands; the front panel screen
displays real-time status information such as voltage, current, and power, etc.. There are two
ways to exit the remote control mode:
Press "Enter" key, the system returns to local operation mode.
Send the programming command "SYSTem:LOCal" to make the power supply return to
local mode.

FTG Series Programming Manual
_________________________________________________________________
４
1.5. Others
For instructions on related software operations, driver installation and communication
operations, please refer to the user manual and the accompanying software instructions. For
the latest information about the software and drivers, please log in to Faithtech's website
http://www.faithtech.cn for inquiries.

FTG Series Programming Manual
_________________________________________________________________
５
2. SCPI Status Registers
2.1. Command introduction
SCPI commands can be divided to common and subsystem commands.
Common commands are defined by the IEEE 488.2 standard to perform common interface
functions. They begin with an * and consist of three letters (command) or three letters and
a ? (query).
Subsystem commands are specific to instrument functions. They can be a single command
or a group of commands. The groups are comprised of commands that extend one or more
levels below the root.
Figure 2-1 Command Levels
2.2. Program syntax
FTG series programmable DC power supply SCPI commands are inherited and expanded
from IEEE488.2 standards. SCPI commands are constructed with keyword, seperator,
paramter and terminator. Below is an example,
CURRent:STATic:L1 10.0
In this command, CURRent, STATic, L1 are command keywords, “:” and space character are
seperator, 10.0 is parameter (some commands have multiple parameters seperated with
comma “,”), A <carriage return> at the end of this command is the command terminator.
Throughout this document, the following conventions are used for the SCPI command
syntax: