Instek PST, PSS, PSH SERIES PROGRAMMABLE POWER SUPPLY
Contents
1. Self test failed CPU test error 3 330 Self test failed RAM test error 3 330 Self test failed ROM test error 3 330 Self test failed DAC ADC test error 3 350 Queue overflow 3 410 Query INTERRUPTED 2 420 Query UNTERMINATED 2 430 Query DEADLOCKED 2 221 Settings conflict Voltage setting error2. Query the setting of the number of times of execution PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SYSTem AUTO DELay lt NRI gt Set the delay time under the current responding memory status SYSTem AUTO DELay Query the setting of the delay time under the current responding memory status SYSTem AUTO END lt NRI1 gt Set the end memory section for auto execute continuously SYSTem AUTO END Query the end memory section for auto execute continuously SYSTem AUTO STARt lt NRI gt Set the start memory section for auto execute continuously SYSTem AUTO STARt Query the start memory section for auto execute continuously SYSTem AUTO STATe lt Boolean gt Sets Auto sequence on or off SYSTem AUTO STATe Returns Auto Sequence mode on or off SYSTem ERRor Read the next item from the error event queue SYSTem MEMory Query the last memory location SYSTem VERSion Returns the SCPI version level Remark The mark means the PSS and PSH do not have the function PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL 6 DETAILS OF COMMAND REFERENCE Each command in this chapter will give a detailed description The examples of each command will be provided and what query form might return CLS no query form Function
3. The lower level nodes QUEStionable and OPERation each have three 16 bits registers CONDition EVENt ENABle Figure 8 shows the sequential relationship between these three types of registers and the commands that relate to each register PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Z kerekere Z f Z i a ER FFF OPERation Status Error Event Queue Z SEIS ZEE I F Z Output Queue Z ZE RE als Standard Event Status Registers Status Byte Register Operation Complete Used 0_ Not Used 1 ee Query 2 BE 2 Device Dependent Error QUES Execution Emor 4 MAV 4 Command Eror 5 ESB 5 User Request RQSMSS 6 PowrOn 7 OPER 7 Summary of IEEE 488 2 Status Structure Registers Figure 7 A graphic representation of the status registers and their connections PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL To SBR Enable Register Condition Event Register Register Figure 8 Status registers and related commands The CONDition register is a read only register which monitors the present state of th
4. to combine commands But continuously query command will cause message missing For example CHAN1 VOLT CURR If the command that follows the semicolon has a different header path from the root level you must use a colon to force a return to the root level CHAN1 VOLT 1 23 0UTP COUP TRAC 1 If the command that follows the semicolon has the same header path you may omit the colon and the path and state only the new leaf node For example CHAN1 VOLT 12 34 CHAN1 CURR 1 55 is equal to CHAN1 VOLT 12 34 CURR 1 55 You can combine commands and queries into the same message Note for example the following combination CHAN1 VOLT 12 34 VOLT Synopsis of Commands The tables in this section summarize the command of the programmable power supply These tables divide the commands into three functional classifications General Setting Commands e Status Commands e Miscellaneous Commands The tables also provide a brief explanation of each command 4B 1 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL General Setting Commands Table 2 lists the general setting commands that control and query the settings of the power supply Table 2 General Setting Commands Command Explanation CHANnel lt x gt CURRent lt NR2 gt 1 Sets the value of current CHANnel lt x gt CURRent 1 Return the value of current gt CHANnel lt x gt VOLTage lt
5. Clear all event status data register This includes the Output Queue Operation Event Status Register Questionable Event Status Register and Standard Event Status Register Syntax CLS Examples CLS clears all event registers ESE Function Set or return the bits in the Event Status Enable Register ESER The ESER enables the Standard Event Status Register SESR to be summarized on bit 5 ESB of the Status Byte Register SBR Syntax ESE lt NR1 gt ESE lt NR1 gt is in the range from 0 through 255 Returns lt NR1 gt is a number from 0 to 255 that indicates the decimal value of the binary bits of the ESER PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Examples ESE 65 sets the ESER to binary 0100 0001 If the ESER contains the binary value 1000 0010 the ESE will return the value of 130 ESR query only Function Return and clear the contents of the Standard Event Status Register SESR Syntax ESR Returns lt NR1 gt is a number from 0 to 255 that indicates the decimal value of the binary bits of the ESER Examples If the ESER contains the binary value 1100 0110 the ESR will return the value of 198 IDN query only Function Return the unique identification code of the power supply Syntax IDN Returns lt string gt includes Manufacturer model number serial number and firm
6. NR2 gt 1 Sets the value of voltage gt CHANnel lt x gt VOLTage 1 Return the value of voltage CHANnel lt x gt MEASure CURRent 1 Returns actual output current gt CHANnel lt x gt MEASure VOLTage 1 Returns actual output voltage CHANnel lt x gt PROTection CURRent lt Boolean gt 1 Sets the overcurrent protection OCP on or off CHANnel lt x gt PROTection CURRent 1 Returns the state of the over current protection OCP setting as either on or off CHANnel lt x gt PROTection VOLTage lt NR2 gt Sets the value of overvoltage protection OVP CHANnel lt x gt PROTection VOLTage 1 Returns the overvoltage protection OVP setting OUTPut COUPle TRACking lt NR1 gt K2 Sets the output of the power supply working Series tracking or Parallel tracking or independent mode OUTPut COUPle TRACking 2 Returns the output of the power supply working mode PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL OUTPut PROTection CLEar Clears over voltage and over current and over temperature protection error message OUTPut STATe lt Boolean gt Sets the output state on or off OUTPut STATe Returns the output state on or off Remark The mark ye 1 means the lt X gt for PSS and PSH series can only be 1 The mark 92 means the PS
7. START 00 END 05 CYCLE 1 Syntax RST PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SAV Function Save the setting data to a specific memory location The PSS and PSH series do not have this function Syntax SAV lt NRI gt lt NRI gt is in the range from 0 through 99 Examples SAV 01 saves the current setting data to memory location 1 SRE Function Set the contents of the Service Request Enable Register SRER The query form returns the contents of the SRER Bit 6 of the SRER is always zero The bits on the SRER correspond to the bits on the SBR Syntax SRE lt NR1 gt SRE Returns lt NR1 gt is the range from 0 through 255 Examples SRE 7 sets bits of the SRER to 0000 0111 If the SRE returns 3 the SRER is set to 0000 0011 STB query only Function The query of the Status Byte register SBR with STB will return a 7 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL decimal number representing the bits that are set true in the status register Syntax STB Returns lt NR1 gt is in the range from 0 through 255 Examples STB returns 81 if SBR contains the binary value 0101 0001 TST query only Function Self test and test the RAM ROM Syntax Returns 300 0 Examples TST returns 0 if the test is successful n returns 3
8. The RS232 connection testing If you want to test whether the RS232 connection is working or not you can send a command from computer For instance using a terminal program send the query command idn should return the Manufacturer model number serial number and firmware version in the following format WK TMPRO PST 3202 A000000 FW1 00 If you do not receive a proper response from the power supply please check if the power is on the RS232 baud rate are the same on both sides and all cable connections are active 4 INPUT AND OUTPUT QUEUE The design of 128 bytes input queue and 128 bytes output queue for storing the pending commands or return messages is to prevent the transmitted commands of remote control and return messages from missing As the maximum stored capacity for Error Event Queue is 20 groups of messages it should be noted that input data exceeding the capacity by using these buffers will cause data missing 5 COMMANDS AND SYNTAX The GPIB commands of the programmable power supply are compatible with IEEE 488 2 and SCPI standards SCPI SCPI Standard Commands for Programmable Instruments is a standard that created by an international consortium of the major test and measurement equipment manufacturers The IEEE 488 2 syntax has been adopted by SCPI to provide common commands for the identical functions of different programmable instruments PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGR
9. messages for the power supplies PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SCPI Error Code and Description SESR Bit 0 No error 100 Command error 200 Execution Error 221 Settings conflict 221 Settings conflict Timer setting error 221 Settings conflict Overvoltage protection setting error 221 Settings conflict Current setting error 4 221 Settings conflict Recall setting error 4 221 Settings conflict Store setting error 4 222 Data out of range 4 222 Data out of range Voltage too large 4 222 Data out of range Current too large 4 222 Data out of range Voltage too small 4 222 Data out of range Current too small 4 240 Hardware Error 4 300 Device specific error 3 300 Device specific error Overcurrent protection error 3 300 Device specific error Overvoltage protection error 3 300 Device specific error Overtemperature protection 3 error 300 Device specific error Calibration current error 3 300 Device specific error Calibration voltage error 3 300 Device specific error Calibration overvoltage 3 protection error 310 System error 3 313 Calibration memory lost 3 330 Self test failed 3 330
10. or query the overvoltage protection value of the specific channel PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Syntax CHANnel lt x gt PROTection VOLTage lt NR2 gt CHANnel lt x gt PROTection VOLTage lt x gt canbe 1 or 2 or 3 lt NR2 gt Please refer to the specification lt x gt for PSS amp PSH can only be 1 Returns lt NR2 gt Examples CHANnell PROTection VOLTage 12 0 sets the channel 1 overvoltage protection limit to 12 0 volts CHANnel1 PROTection VOLTage returns 2 34 if the channel 1 overvoltage protection limit setting is 2 34 volts OUTPut COUPle TRACking Function Change the output of the channel and channel 2 to series tracking or parallel tracking or independent output mode The PSS and PSH series do not have this function Syntax OUTPut COUPle TRACking lt NR1 gt OUTPut COUPle TRACking be 0 INDEPENDENT or 1 PARALLEL TRACKING or 2 SERIES TRACKING Returns 01112 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Examples OUTPut COUPle TRACking 2 set the output of the channel 1 and channel 2 to series tracking mode If the output is in the parallel tracking mode the command of OUTPut COUPle TRACking will return the value of 1 OUTPut PROTection CLEar no query form Function Clear all the protective messages OTP OVP OCP from
11. sent to the instrument it must add a LF to be a judgment for message terminator As for query command the return message of the instrument is also added a LF for PC to judge message terminator Entering Commands The standards that govern the command set for the programmable power supply allow for a certain amount of flexibility when you enter commands For instance you can abbreviate many commands or combine commands into one message that you send to the programmable power supply This flexibility called friendly listening saves programming time and makes the command set easier to remember and use Command Characters The programmable power supplies are not sensitive to the case of command characters You can enter commands in either uppercase or lowercase You can execute any command with white space characters You must however use at least one space between the parameter and the command header Abbreviating Commands Most commands have a long form and a short form The listing for each command in this section shows the abbreviations in uppercase For instance you can enter the query CHANnell VOLTage 1 23 simply as CHAN1 VOLT 1 23 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Because the programmable power supply hypothesis that a command starts from the root you have the option of beginning the initial command header with a colon Combining Commands You can use a semicolon
12. the panel of the device Syntax OUTPot PROTection CLEar When the panel displays the protective message no further setting can be accepted by the device Uses this command to clear the displayed messages in order to execute further setting Examples OUTPot PROTection CLEar OUTPut STATe Function Set the output state on or off Syntax OUTPut STATe lt Boolean gt OUTPut STATe lt Boolean gt can be O OFF or 1 Returns 011 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Examples OUTPut STATe 1 enables the power supply output If the power supply output is disabled OUTPut STATe will return 0 STATus OPERation CONDition query only Function Return the contents of the OPERation register The programmable power supplies however do not use the OPERation register to report any conditions Syntax STATus OPERation CONDition Returns lt NR1 gt Examples STATus OPERation CONDition returns 0 STATus OPERation ENABle Function Set or query the enable mask that allows the masked conditions in the event register to be reported in the summary bit If a bit is 1 true in the enable register and its associated event bit changes to 1 true the associated summary bit will change to 1 true Even though this is a 16 bit register only 15 bits bit 0 through bit 14 are used Bit 15 always reads 0 Synta
13. the power supply requests service from the GPIB controller The bit 7 OPER OPERation is the summary bit for the OESR OPERation EVENt STATus Register PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Use the serial poll or the STB Query to read the contents of the SBR The bits in the SBR are set and cleared depending on the contents of the Standard Event Status Register SESR the Standard Event Status Register SESR and the Output Queue Standard Event Status Register SESR Table 7 shows the SESR Table 7 Standard Event Status Register SESR Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 PON URQ CME EXE DDE QYE NU OPC The bit 0 OPC Operation Complete shows that the operation is completed This bit is active when all pending operations are completed following an OPC command The bit 1 is always zero The bit 2 QYE Query Error indicates a command or query protocol error The bit 3 DDE Device Error shows that a device error occurred The bit 4 EXE Execution Error shows that an error occurred while the power supply was executing a command or query The bit 5 CME Command Error shows that an error occurred while the power supply was parsing a command or query The bit 6 USR User Request indicates the LOCAL button was pushed The bit 7 PON Power On shows that the power supply was powered on Use the ESR Query to read the SESR Read th
14. 00 if the test is unsuccessful WAI no query form Function WAI prevents the programming instrument from executing further commands or queries until all pending operations are finished Syntax WAI PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL CHANnel lt x gt CURRent Function Set or query the output current value of the specific channel Syntax CHANnel lt x gt CURRent lt NR2 gt CHANnel lt x gt CURRent lt x gt can be 1 or 2 or 3 lt NR2 gt Please refer to the specification lt x gt for PSS amp PSH can only be 1 Returns lt NR2 gt Examples CHANnel1l CURRent 2 0 sets the channel 1 current limit to 2 0 amps CHANnel1l CURRent returns 0 012 if the channel 1 current limit setting is 0 012 amps CHANnel lt x gt VOLTage Function Set or query the output voltage value of the specific channel Syntax CHANnel lt x gt VOLTage lt NR2 gt CHANnel lt x gt VOLTage lt x gt be 1 2 or 3 lt NR2 gt Please refer to the specification lt x gt for PSS amp PSH can only be 1 Returns PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL lt NR2 gt Examples CHANnel1l VOLTage 12 0 sets the channel 1 voltage limit to 12 0 volts 11 returns 2 34 if the channel 1 voltage limit setting is 2 34 volts CHANnel lt x gt MEASure CURRe
15. 12 Bit 11 Bit 10 Bit9 Bits NU NU NU NU NU NU NU Bit 7 Bit 6 BitS Bit4 Bit3 Bit2 Bit1 BitO NU NU NU NU NU NU NU NU NU not used PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Status Registers There are two status registers are included to the power supply defined by 488 1 IEEE 488 2 standards e Status Byte Register SBR e Standard Event Status Register SESR Status Byte Register SBR The SBR Table 6 summarizes the status of all other registers and queues Table 6 Status Byte Register SBR Bit 7 Bit 6 Bit 5 Bit4 Bit3 Bit2 Bit1 BitO OPER RQS MSS ESB MAV QUES E E NU NU The bit 0 and 1 are not used so these bits are always zero The bit 2 Error and Event indicates an error code is waiting to be read in the Error Event Queue The bit 3 QUES QUEStionable is the summary bit for the QESR QUEStionable Event Status Register When the bit is high it indicates that status is enabled and present in the QUES The bit 4 MAV Message Available indicates that output is available in the output queue The bit 5 ESB Event Status Bit is the summary bit for the Standard Event Status Register SESR When the bit is high it indicates that status is enabled and present in the SESR The bit 6 RQS Request Service is obtained from a serial poll and shows that
16. AMMER MANUAL SCPI Common Command amp Queries lt 7 f gt Syntax amp Status Data Structure H T Interface Function 1 SCPI TEEE 488 1 SCPI IEEE 488 2 IEEE 488 2 Figure 3 the relationship between 488 1 IEEE 488 2 and SCPI As shown in the figure 3 IEEE 488 1 standard locates at layer A the layer A belongs to the protocol of interface function on the GPIB bus The source handshake SH acceptor handshake AH and talker are included to this layer 10 interface functions totally At layer B the syntax and data structure could be the essence of entire IEEE 488 2 standard The syntax defines the function of message communication which contain the lt PROGRAM MESSAGE gt or simply commands and lt RESPONSE MESSAGE gt The two kinds of messages represent the syntax formation of device command and return value The data structure is the constitution of status reporting which 488 2 standard have been defined The common commands and queries are included to layer C Commands and queries can be divided into two parts mandatory and optional Commands modify control settings or tell the instrument to perform a specific action Queries cause the instrument to send data or status information back to the computer A question mark at the end of a ee ree PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL
17. N ABle lt NRI gt Sets the contents of the enable mask for the QUEStionable enable register STATus QUEStionable EN ABle Query the contents of the Questionable Enable register STATus QUEStionable EV ENt Query the contents of the QUEStionable Event register Miscellaneous Commands Table 4 lists the miscellaneous commands that control general housekeeping functions of the programmable power supply PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Table 4 Miscellaneous Commands IDN Returns instrument identification OPC Reports when operation is complete by setting the Operation Complete bit in SESR OPC Reports when operation is complete Same as OPC except returns a 1 to the output queue and dose not set the SESR bit RCL the setting data from the memory which previous saved RST Resets the protection levels and states resets the current and voltage levels to zero sets the output off and sets memory section to 00 SAV Saves the setting data to memory TST Initiates internal self test and reports results WAI Wait to continue This command forces sequential operation of commands This command is required by IEEE 488 1 1987 The power supply however forces sequential operation of commands by design SYSTem AUTO CYCLe Set number of times of execution lt NRI gt SYSTem AUTO CYCLe
18. PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SYSTem AUTO DELay Function Set the delay time under the current responding memory status The PSS and PSH series do not have this function Syntax SYSTem AUTO DELay lt NR1 gt SYSTem AUTO DELay T lt NR1 gt isin the range from 1 through 59999 its unit is 100ms Returns lt NR1 gt Examples SYSTem AUTO DELay 1 sets auto delay time at 100ms for memory of the specific section T SYSTem AUTO DELay 1000 sets auto delay time at 100 seconds for the memory of the specific section no further setting of auto delay will be done on next memory section until the previous auto delay is fulfilled If the command SYSTem AUTO DELay Returns 5 means delay 500ms at the current memory section that displayed on the LCD panel SYSTem AUTO END Function Set the end memory section for auto execute continuously The PSS and PSH series do not have this function Syntax SYSTem AUTO END lt NR1 gt SYSTem AUTO END lt NR1 gt is in the range from 0 through 99 and must be large or equal to Bay PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL the value of START Returns lt NR1 gt Examples SYSTem AUTO END 8 sets auto end on from the memory of location 8 of the current device If the command SYSTem AUTO END Returns 99 m
19. PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL CONTENTS PAGE 1 1 2 CONNECTING POWER SUPPLY VIA GPIB INTERFACE 1 3 CONNECTING POWER SUPPLY VIA RS232 INTERFACE 4 4 INPUT AND OUTPUT 7 5 COMMANDS AND 5 7 6 DETAILS OF COMMAND 19 7 STATUS AND ERROR 38 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL 1 INTRODUCTION In the modern automatic measurement system communication between equipments and computers is essential The measured procedures can be varied with users testing programs therefore the programmable power supply can be operated remotely from an instrument controller or computer across the RS232 interface optional or GPIB optional Interface selection and setup The GPIB address can be changed in normal operation condition Press SHIFT key and LOCAL key on the front panel in which the last transmitting interface settings will be displayed Select interface and press ENTER then select the baud rate or GPIB address and press ENTER to confirm the setting by using the knobs Finally select save and press ENTER to store the setup 2 CONNECTING THE PROGRAMMABLE POWE
20. R SUPPLY VIA GPIB INTERFACE The GPIB interface capabilities The GPIB interface of the programmable power supply corresponds to the standard of IEEE488 1 1987 488 2 1992 and SCPI 1994 The GPIB interface functions are listed as follows SH1 Source Handshake The power supply can transmit multilane messages across the GPIB AH1 Acceptor Handshake The power supply can receive multilane messages across the GPIB T6 Talker Talker interface function includes basic talker serial poll and unaddress if MLA capabilities without talk only mode function ef PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL L4 Listener The power supply becomes a listener when the controller sends its listen address with the ATN attention line asserted The power supply does not have listen only capability SR1 Service Request The power supply asserts the SRQ Service request line to notify the controller when it requires service Remote Local The power supply responds to both the GTL Go to Local and LLO Local Lock Out interface messages PPO Parallel Poll The power supply has no Parallel Poll interface function DC1 Device Clear The power supply has Device clear capability to return the device to power on status DTO Device Trigger The power supply has no Device Trigger interface function CO Controller The power supply can not control other devices Not
21. S and PSH series do not have the function Status Commands Table 3 lists the status commands that set and query the various registers and queues that make up the status and event structure of the programmable power supply Table 3 Status Commands CLS Clears the status data structures ESE lt NRI gt Sets the Event Status Enable Register ESER ESE Returns contents of Event Status Enable Register ESER ESR Returns and clear the contents of Standard Event Status Register SESR SRE lt NRI gt Sets contents of Service Request Enable Register SRER PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SRE Returns contents of Service Request Enable Register SRER STB Reads Status Byte Register SBR STATus OPERation COND ition Returns the contents of the OPERation condition register Returns NR1 STATus OPERation ENAB le lt NRI gt Sets the contents of the enable mask for the OPERation event register STATus OPERation ENAB le Returns the contents of the enable mask for the OPERation event register Returns NR1 STATus OPERation EVEN t Query the contents of the OPERation Event register STATus PRESet Presets the OPERation and QUEStionable status registers STATus QUEStionable CO NDition Returns the contents of the OPERation condition register Returns NR1 STATus QUEStionable E
22. command identifies it as a query Layer D is interrelated with device information Different devices have different functions SCPI command sets belong to this layer Command Syntax If you want to transfer any instructions to an instrument and comply with SCPI there are three basic elements must be included Command header e Parameter if required e Message terminator or separator Command Header The command header has a hierarchical structure that can be represented by a command tree Figure 4 The top level of the tree is the root level A root node is located at the root level A root node and one or more lower level nodes form a header path to the last node called the leaf node SYSTem Root node ERRor AUTO JdH Lower level node STATe Figure 4 Tree hierarchy CYCLe lt Leaf Node T eaf PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL The command header is configured by header path and leaf node Figure 5 shows the command header for the leaf node indicated in Figure 4 SYSTem AUTO STATe kasa Root Node Header Path Leaf Node Command Header Figure 5 Command Header Parameter If the commands have parameters the values have to be included In this manual when we expressed the syntax of the command the lt gt symbols are used for enclosing the parameter type For instance the syntax of the comma
23. e SESR and clear the bits of the registers so that the register can accumulate information about new events Enable Registers The enable registers determine whether certain events are reported to the Status Byte Register and SRQ The programmable power supply has the PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL following enable registers e Event Status Enable Register ESER e OPERation Enable Register e QUEStionable Enable Register e Service Request Enable Register SRER When one of the bits of the enable registers is high and the corresponding bit in the status register is high the enable registers will perform a logical OR function the output that controls the set bit of the Status Byte Register is high Various commands set the bits in the enable registers The following sections describe the enable registers and the commands that set them Event Status Enable Register ESER The ESER controls which types of events are summarized by the Event Status Bit ESB in the SBR The bits of the ESER correspond to the bits of the SESR Use the ESE command to set the bits in ESER Use the ESE query to read it OPERation Enable Register Even though the OPERation Enable Register is present in the programmable power supplies the OPERation registers do not report any conditions QUEStionable_Enable Register The QUEStionable Enable Register controls which types of events ar
24. e instrument The CONDition register updates in real time and the inputs are not latched or buffered When a condition monitored by the CONDition register becomes true the bit for that condition also becomes true 1 When the condition is false the bit is 0 The read only EVENt register latches any false to true change in condition Once the bit in the EVENt register is set it is no longer affected by changes in the corresponding bit of the CONDition register The bit remains set until the controller reads it The command CLS Clear Status clears the EVENt register QUEStionable Status Registers Table 4 shows the bit designations of the 16 bit QUEStionable Status Register PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Table 4 QUEStionable Status Register Bit15 Bit14 Bit13 Bit12 Bit 11 Bit 10 Bit 9 Bit 8 NU NU NU NU Summary NU OVP Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 NU NU NU NU NU NU Summar Summary y Current Voltage The command STATus QUEStionable CONDtion Reads the QUEStionable CONDition register but dose not clear it The command STATus QUEStionable EVENt Reads the QUEStionable EVENt Status register and clears it OPERation Status Registers Table 5 shows the bit designations of the 16 bit OPERation Status Register Table 5 OPERation Status Register Bit 15 Bit 14 Bit 13 Bit
25. e summarized by the QUES status bit in the SBR Use the STATus QUEStionable ENABle command to set the bits in the QUEStionable Enable register Use the STATus QUEStionable ENABle query to read it Service Request Enable Register SRER The SRER controls which bits in the SBR generate a service request Use the SRE command to set the SRER Use the SRE query to read it PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Queues The output queue is included to power supplies Output Queue The programmable power supplies store query responses in the output queue by succeeding the IEEE 488 2 protocol If the power supply receives a new command or query message after a message terminator the power supply will clear and reset this queue each time The computer must read a query response before it sends the next command or query or it loses response to earlier queries Error Event Queues When an error or event occurs the output queue stores the message The output queue stores and reports the messages on a FIFO first in first out state The SYSTem ERRor query reads the next item from the output queue If output queue overflows the error message is 350 Queue overflow the queue can t store or report succeeding messages till it is read or cleared Error Message Table 8 lists the SCPI error messages for the programmable power supplies Table 8 The error
26. eans set the section 99 as the end SYSTem AUTO STARt Function Set the start memory section for auto execute continuously The PSS and PSH series do not have this function Syntax SYSTem AUTO STARt lt NR1 gt SYS Tem AUTOSTART lt NR1 gt is in the range from 0 through 99 and must be small or equal to the value of END Returns lt NR1 gt Examples SYSTem AUTO STARt 0 sets auto start on from the memory of location 0 of the current device If the command SYSTem ATUO STARt Returns 2 means set the section 2 as the start PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SYSTem AUTO STATe Function Set or return automatic sequence setting The PSS and PSH series do not have this function Syntax SYSTem AUTO STATe lt Boolean gt SYSTem AUTO STATe lt Boolean gt can be O OFF or 1 ON Returns 011 Examples SYSTem AUTO STATe 1 sets auto sequence on SYSTem ERRor query only Function Query the next error message from the Error Event queue The result of the query is the error number followed by the error text Syntax SYSTem ERRor Returns lt string gt Examples SYSTem ERRor returns 0 No error PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL SYSTem MEMory query only Function Read the current memory section number displayed on the panel The PSS and PSH series do n
27. ed summary bit will change to 1 true Even though this is a 16 bit register only 15 bits bit 0 through bit 14 are used Bit 15 always reads 0 Syntax STATus QUEStionable ENABle lt NRI1 gt STATus QUEStionable ENAB1le lt NR1 gt is an integer from 0 to 32767 Returns lt NR1 gt Examples STATus QUEStionable ENABle 32767 sets all 15 bits of the register to 1 If the STATus QUEStionable ENABle returns 0 all 15 bits of the register are 0 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL STATus QUEStionable EVENt query only Function Return and clear the contents of the QUEStionable register The response is a decimal value that summarizes the binary values of the set bits Syntax STATus QUEStionable EVENt Returns lt NR1 gt Examples STATus QUEStionable EVENt returns 0 SYSTem AUTO CYCLe Function Set or query the number of times of execution The PSS and PSH series do not have this function Syntax SYSTem AUTO CYCLe lt NR1 gt SYSTem AUTO CYCLe lt NR1 gt is in the range from 0 through 99999 or infinite Returns lt NR1 gt Examples SYSTem AUTO CYCLe 8 sets auto cycle on to repeat the setting 8 times SYSTem AUTO CYCLe 0 sets auto cycle on to repeat the setting infinite If the command SYSTem AUTO CYCLe Returns 0 means infinite PST amp PSS amp PSH SERIES
28. es for GPIB installation When the programmable power supply is set up with a GPIB system please check the following things Only a maximum of 15 devices be connected to a single GPIB bus Do not use more than 20m of cable to connect devices to a bus Connect one device for every 2m of cable used Each device on the bus needs a unique device address No two devices can share the same device address PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Turn on at least two thirds of the devices the GPIB system while using the system Do not use loop or parallel structure for the topology of GPIB system Computer s Connection A personal computer with a GPIB card is the essential facilities in order to operate the programmable power supply via GPIB interface The connections between power supply and computer are following Connect end of a GPIB cable to the computer IL Connect the other end of the GPIB cable to the GPIB port on the programmable power supply Turn on programmable power supply IV Turn on the computer The GPIB connection testing If you want to test whether the GPIB connection is working or not you can send a GPIB command from computer For instance the query command idn should return the Manufacturer model number serial number and firmware version in the following format WK TMPRO PST 3202 A000000 FW1 00 If
29. nd in Figure 6 includes the Boolean parameter type NOTE Do not include the lt gt or symbols when entering the actual value for a parameter S STem AUTO STATe lt Boolean gt Parameter Space Figure 6 Command Header with Parameter 10 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Table 1 defines the Boolean and other parameter types for the programmable power supply Parameter Type Description Example Boolean Boolean numbers or oe values NRI Integers 0 1 18 NR2 Decimal numbers 1 5 3 141 8 4 NR3 Floating pointnumbers 4 5 1 8 25E 1 String Alphanumeric characters No error Table 1 Parameter Types for Syntax Descriptions Message Terminator and Message Separator I GPIB message terminators In accordance with IEEE 488 2 standard any of the following message terminators are acceptable LF END Line feed code hexadecimal 0A with END message e LF Line feed code e lt dab gt END Last data byte with END message These terminators are compatible with most application programs A semicolon separates one command from another when the commands appear on the same line PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL II RS232 message terminators As there is no signal of end message on RS232 bus therefore use LF as message terminator When a series of commands are
30. nt Query Only Function Read the actual output current of the specific channel Syntax CHANnel lt x gt MEASure CURRent lt x gt or 2 or 3 lt x gt for PSS amp PSH can only be 1 Returns lt NR2 gt Examples CHANnel1 MEASure CURRent might return 1 234 to indicate that the load is drawing 1 234 A 1 lt gt MEASure VOLTage Query Only Function Read the actual output voltage of the specific channel Syntax CHANnel lt x gt MEASure VOLTage lt x gt canbe 1 or 2 or 3 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL lt x gt for PSS amp PSH can only be 1 Returns lt NR2 gt Examples CHANnel1 MEASure VOLTage might return 11 55 to indicate the voltage at the channel 1 output is 11 55 V CHANnel lt x gt PROTection CURRent Function Set or query the overcurrent protection status of the specific channel Syntax CHANnel lt x gt PROTection CURRent lt Boolean gt CHANnel lt x gt PROTection CURRent lt x gt 1 or 2 or 3 lt Boolean gt can be 0 OFF 1 ON lt x gt for PSS amp PSH can only be 1 Returns 011 Examples CHANnel PROTection CURRent 0 sets the over current protection off If the overcurrent protection setting is on the command of CHANnel PROTection CURRent will return the value of 1 CHANnel lt x gt PROTection VOLTage Function Set
31. ot have this function Syntax SYSTem MEMory Returns lt NR1 gt SYSTem VERSion query only Function Return the SCPI version of the device Syntax SYSTem VERSion Returns 1994 0 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL 7 STATUS AND ERROR REPORTING A set of status registers allows the user to quickly determine the power supply s internal processing status The status register as well as the status and event reporting system adhere to SCPI recommendations Structure of System The sketch of the status and event reporting system is showed as figure 7 Each component of the sketch represents a set of registers and queues that can read report or enable the occurrence of certain events within the system If a specific event in the power supply sets a bit in a status register reading which can tell you what types of events have occurred Each bit in the status register corresponds to a bit in an enable register the enable bit must be high for the event to be reported to the Status Byte Register A Service Request SRQ is the last event to occur The SRQ requests an interrupt on the GPIB to report events to the system controller Status Registers There are two kinds of status registers are included to the programmable power supplies e OPERation Status Registers CONDition EVENt ENABle e QUEStionable Status Registers CONDition EVENt and
32. sure that the chassis ground of the equipment is connected to the chassis ground of the external device ee eee PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL PROGRAMMER MANUAL Do not use more than 15m of cable to connect devices to a e Ensure the same baud rate is used on the device as the one used on PC terminal EQUIPMENT COMPUTER Ensure the connector for the both side of cable and the internal connected line are met the demand of the instrument ye PTE DES DEE No connection Pin3 Pin3 Receive Data RxD input Transmit Data TxD output Pin5 4 Pi No connection Signal Ground GND No connection Figure 2 Wiring configuration for DB9 to DB9 No connection No connection Computer s Connection 9 o No connection A personal computer with a COM port is the essential facilities in order to operate the programmable power supply via RS232 interface Figure 1 Pin assignments of the RS232 connector on the rear panel for DB 9 D The connections between power supply and computer are as follows Connect one end of RS232 cable to the computer Connect the other end of the cable to the RS232 port the programmable power supply Turn on programmable power supply IV Turn on the computer PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL
33. ware version PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Examples IDN Returns WK TMPRO PST 3202 A000000 FW1 00 OPC Function The command form OPC sets the operation complete bit bit 0 in the Standard Event Status Register SESR when all pending operations are finished The query form OPC tells the programmable power supply to place an ASCII 1 in the Output Queue when the power supply completes all pending operations Syntax OPC Returns 1 RCL Function Recall the setting data from the memory saved previously The PSS and PSH series do not have this function Syntax RCL lt NR1 gt lt NR1 gt is in the range from 0 through 99 Examples RCL 12 recalls the setting data stored in memory location 12 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL RST no query form Function Set all control settings of power supply to their default values but does not purge stored setting The equivalent panel control will be set as below Front Panel Control Default Setting OUTPUT OFF CURRENT SET 0 VOLTS SET 0 OCP SET OFF DELAY 1 sec AUTO SET OFF RECALL memory location 00 OVP SET MAXimum Please refer to the user manual for the OVP setting OUTPUT MODE INDEP INDEP SERIES PARALLEL STEP SET MINIMUM Please refer to the user manual RECALL RANGE
34. x STATus OPERation ENABle STATus OPERation ENAB1le lt NR1 gt is an integer from 0 to 32767 PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL Returns lt NR1 gt Examples STATus OPERation ENABle 32767 sets all 15 bits of the register to 1 If the STATus OPERation ENABle returns 0 all 15 bits of the register are 0 STATus OPERation EVENt query only Function Returns and clears the contents of the OPERation register Syntax STATus OPERation EVENt Returns lt NR1 gt Examples STATus OPERation EVENt returns 0 STATus PRESet Function Set the OPERation and QUESTionable enable registers to zeros Syntax STATus PRESet STATus QUEStionable CONDition query only Function Return the contents of the QUEStionable register Reading the condition PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL register is non destructive Syntax STATus QUEStionable CONDition Returns lt NR1 gt Examples STATus QUEStionable CONDition returns 0 STATus QUEStionable ENABle Function Set or query the enable mask that allows the masked conditions in the event register to be reported in the summary bit If a bit is 1 true in the enable register and its associated event bit changes to 1 true the associat
35. you do not receive a proper response from the power supply please check if the power is on the GPIB address is correct and all cable connections are active PST amp PSS amp PSH SERIES PROGRAMMABLE POWER SUPPLY PROGRAMMER MANUAL 3 CONNECTING THE PROGRAMMABLE POWER SUPPLY VIA RS232 INTERFACE The RS232 interface capabilities The RS232 interface provides a point to point connection between two items of equipment such as a computer and the power supply There are some parameters you need to set on the both sides Once you have set these parameters you can control the power supply through the RS232 interface e Baud rate You can set rates of 1200 2400 4800 9600 baud e Parity bit none e Data bit 8 bits e Stop bit 1 stop bit e Data flow control Notes for RS232 installation The power supply is a DTE device with a 9 pin D type shell RS232 connector located on the rear panel Figure 1 shows the equipment of 9 pin connector male with its pin number assignments Figure 2 shows the wiring configuration for DB9 to DB9 When the programmable power supply is set up with a RS232 interface please check the following points Do not connect the output line of one DTE device to the output line of the other Many devices require a constant high signal on one or more input pins e Ensure that the signal ground of the equipment is connected to the signal ground of the external device En
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