TDI MCL488 Series Operation & Programming Manual
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TDI MCL488 Series Operation & Programming Manual

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  • Page 1 sales@artisantg.com artisantg.com (217) 352-9330 | Visit our website - Click HERE...
  • Page 2 1 C D 1 POWER MCL488 Series Electronic Loads Operation & Programming Manual TDI-Dynaload ® Division Document Number 403606R e v i s i o n A...
  • Page 3 Telephone: (908) 850-5088 Facsimile: (908) 850-0679 Online Availability To find out more about TDI and our products, visit us on the web at: http://www.tdipower.com/ or visit TDI-Dynaload directly at: http://www.tdipower.com/dynaload/. Customer Services For technical assistance regarding our products, contact the following:...

  • Page 4: Table Of Contents

    T ABLE OF CONTENTS Revision A 09/16/05 Introduction 6 Protective Circuits 7 Current Limit7 Power Limit7 Overvoltage7 Reverse Polarity 7 Undervoltage Lockout7 Front Panel Operation8 Electrical Connections Terminal Identification 9 Terminal Block9 I EE E-488/RS232 (optional) 9 E+ and E- Wiring Tips9 AC Input Effects of Cable Length1 Current Oscillation...
  • Page 5 Amps/ Volts or Ohms1 Terminator Number of Pulses1 Memory Set1 Short Enable1 Pulse Amplitude, Absolute or Delta1 Undervoltage Lockout1 Pulse Train 1 System Wide DC ON/OFF Control Scale Factor1 Fault Indicators1 Pulse Loading 2 Manual Operation2 IEEE-488 Programming2 Effects of Cable Inductance on Pulse Loading2 Transconductance2 Linking Modules 2 Location, Airflow and Maintenance2...
  • Page 6 D3 ( d u t y cycle setting) 4 FQ ( f r e q u e n c y setting) 1 1 ( c o n s t a n t current base setting) 1 2 ( c o n s t a n t current peak setting) 1 3 ( c o n s t a n t current peak setting)4 LAT ( s e t latched fault mask)4 LOAD OFF...
  • Page 7 V2 ( p e a k voltage. pulse mode)6 V3 ( p e a k voltage 3, pulse mode)6 WF ( p u l s e mode on)6 XM ( e x t e r n a l modulation) 6 *RST ( r e s e t ) 6 Status &...

  • Page 8: Introduction

    The Dynaload is a precision instrument which simulates DC loads to test power supplies, generators. servo systems, batteries and similar DC sources. The MCL488 series provides up to ten load channels housed in a single chassis. Each load channel is fully independent, operating in one of four modes: Constant Current, Constant Resistance, Constant Voltage and Constant Power.

  • Page 9: Protective Circuits

    PROTECTION CIRCUITS CURRENT LIMIT: Each load channel is protected from drawing excessive current beyond its rating. The factory set point is 65 Amps. This is not a user settable function and serves to protect the load module only. This limit acts as an absolute barrier and will not permit the current to increase beyond the setpoint.

  • Page 10: Front Panel Operation8

    FRONT P ANEL OPERATION - 6 ) Y 1 l i k L i A 1 CHANNEL C I : 6 0 . 0 D A TYPE: 4 0 0 V / 6 0 A DC LOAD r--7 MODES PULSE FAULT REMOTE 1:1 •...

  • Page 11: Electrical Connections

    ELECTRICAL CONNECTIONS TERMINAL IDENTIFICATION E-. E+ are the power input studs for connection to the power source. These are the large studs on the rear of the unit. CAUTION - Only the power source-to-load connections are to be made to these studs.

  • Page 12: Effects Of Cable Length1

    EFFECTS OF CABLE LENGTH CURRENT OSCILLATION The Dynaload regulation loop is designed to operate at a maximum response time of 100cS. This is not affected by manipulating the slew rate. When operating in any of the constant DC modes, the external cable length can effect the performance of the load. If the total inductance of the power cables is excessive, a parasitic oscillation may occur.

  • Page 13: Pgm1

    PGM+ This is the remote control input signal. 0 to 10 volts in yields 0 to full scale loading in whatever mode and range is selected. The signal source should be referenced to PGM-. The maximum voltage permitted from PGM+ to PGM - is 10 Volts. PGM- This is the signal return for the remote control input.

  • Page 14: Terminal Block Connections1

    TERMINAL BLOCK CONNECTIONS —CURRENT SAMPLE OUTPUT Pcm+—REMOTE PROGRAM INPUT + POW —REMOTE PROGRAM RETURN - LINK —MASTER CONTROL OUTPUT + — NEGATIVE INPUT — NEGATIVE SENSE — POSITIVE SENSE FOR LOCAL VOLTAGE SENSING, CONNECT (5+) TO (E+) AND CONNECT (S-) TO (E-) —...

  • Page 15: Operating Instructions

    OPERA TING INSTRUCTIONS The following procedure is recommended for connecting the Dynaload: 1. A C switch should be turned off. 2. C o n n e c t DC source(s) to E+ and E- stud(s). 3. I f external analog programming is to be used, connect signal source(s). Connect link signals for paralleled modules.

  • Page 16: Local Control

    of requirements. The actual available ranges are outlined in the specification section of this manual. NOTE: T h e resistance may be entered in Ohms or Amps/Volt (1/R). This option is selected for front panel operation through the menus. For automated control, either the AVx or the CRx commands are used.

  • Page 17: Manual Adjust Knob1

    NOTE: To use the short circuit feature, the undervoltage protection must be disabled through the front panel menu, or with the UV OFF command. CAUTION! T h e short circuit button is used only on power sources having inherent current limit capability. CAUTION! T h e short circuit button must not be used if the power source is capable of delivering a current greater than the maximum current rating.

  • Page 18: Ieee Address Setting

    — Slew Rate limit - IEEE bus address — Knob Resolution for load level — Knob Resolution for time — Knob Resolution for frequency — Lock Front Panel — Change Password for front panel lock — enter resistive load level as Ohms or amps/volt —...

  • Page 19: Knob Resolution For Frequency1

    KNOB RESOLUTION FOR FREQUENCY The resolution for the rotary knob can be set when operating in the frequency set mode. The minimum frequency increment is .001 and the maximum is 1.00A. It is up to the users discretion to set an appropriate resolution. This function is active when using the FREQ key on the front panel.

  • Page 20: Short Enable1

    NOTE: Memory location zero (0) is the start up location of the load. Each time t h e AC power is applied memory location (0) is executed. NOTE: The memory set locations are channel specific. There are 10 memory locations per channel. If the user sets a memory location for channel 1, it will have no effect on any other channel.

  • Page 21: Fault Indicators1

    The pulse function has the ability to be enhanced by applying a scale factor. This will extend the minimum operating frequency range by the number entered. Refer to the pulse loading section of this manual for more detail. FAUL T INDICATORS Red is alarm or major fault.

  • Page 22: Pulse Loading

    PULSE LOADING Pulse loading is available in all four modes of operation. The examples below depict Constant Current mode, but are applicable to all modes. Pulse loading may be set for two load levels or three levels. To enable or disable three level pulsing, use the front panel menu or the TP [ON/OFF] command.

  • Page 23: Manual Operation2

    The frequency and duty cycle limits are a result of the minimum and maximum limits of pulse duration. The factory default condition limits the minimum pulse duration to 10.<S, maximum duration of 16,777,215 c<S, with a resolution of 1 «S. To achieve longer duration pulses, a scale factor may be used which slows the timing characteristics per the following equations: Resolution = scale factor (o<S) Minimum duration = scale factor (.<S), or 10.<S, whichever is longer...

  • Page 24: Ieee-488 Programming2

    IEEE-488 PROGRAMMING the CH command to select the desired channel. the appropriate command to set the baseline current, power, voltage, or resistance. the FREQ Command to set the frequency. the DU command to set the duty cycle. For applications which require the period to be set, the T1 and T2 commands should be used.

  • Page 25: Effects Of Cable Inductance On Pulse Loading2

    EFFECTS OF CABLE INDUCT ANCE ON PULSE LOADING When the Dynaload is used for high current pulse loading. the effects of cable inductance must be considered. The critical parameters are the rise time and the minimum compliance specifications. If the inductance of the cables from the voltage source is great enough to cause the voltage at the Dynaload to go below the minimum compliance level, then excessive current wave form distortion will occur.

  • Page 26: Transconductance2

    increase it. One way is to use several insulated conductors. This cuts the inductance in half if 4 are used instead of 2 or by one-third if 6 are used. This double or triples the maximum length, respectively. Another method is to slow down the rise time of the pulse generator before applying it to the regulation loop.
  • Page 27 The MCL488 load modules can be linked in order to operate at higher current and power levels. The loads which are "linked" will operate as a single load with all current and voltage readbacks reflecting the total current and power of the group. Any number of channels can be linked, and there are no restrictions to the number of linked groups within a chassis.
  • Page 28 LOCATION, AIRFLOW, MAINTENANCE The following figures show the dimensions of your Dynaload. The MCL488 is designed with rack mounting ears for installation in a 19" rack enclosure. In addition to the rack mounting ears, the use of slides or shelf type supports is required. To facilitate this, the MCL488 is equipped with mounting holes that match Jonathan 110QD-24-2 slides.

  • Page 29: Operator Safety Instructions2

    OPERA TOR SAFETY INSTRUCTIONS It is very important that these safety instructions and operation instructions are read and understood prior to the installation and use of this electronic load. Failure to follow these basic guidelines could result in serious injury or death. This electronic load is inherently safe by design.

  • Page 30: Ieee-488 Programming Introduction2

    IEEE-488 PROGRAMMING INTRODUCTION The purpose of this section is to enable you to use IEEE-488 commands to operate your programmable Dynaload. This section assumes that your MCL488 has been installed, is operating properly, and that an IEEE-488 bus controller has been attached to it. It is also assumed that the IEEE-488 address and terminator has been set through the front panel menu selections.

  • Page 31: Ieee-488 Bus Subsets2

    IEEE-488 Bus SUBSETS The programmable Dynaload has the IEEE-488 bus subset capabilities indicated below. SUBSET CATEGORY RESPONSE Full capability - the load can generate Acceptor Handshake the handshake for receiving data. Source Handshake Full capability - the load can generate the handshake for transmitting data.

  • Page 32: Data Separators3

    DATA SEPARATORS It is not necessary to separate numerical data from the previous command by any character. The use of a space is recommended, however, as it aids in command string legibility. PROGRAM LINE TERMINATORS The terminator instructs the Dynaload that the end of an incoming command line has been reached and that command decoding can begin.

  • Page 33: Numerical Data Formats3

    NUMERICAL DATA FORMATS The programmable Dynaload accepts the numerical data formats listed below. These are described in more detail in IEEE standard 488.2 "standard digital interface for programmable instruments". SYMBOL FORM(S) with no decimal point. T h e decimal point is assumed to be to the right of the least significant digit, For example: 314, 0314.

  • Page 34: Numerical Data Units3

    NUMERICAL DATA UNITS The numerical units in which the MCL488 receives and transmits quantities are fixed. They are listed in the table below. Incoming commands must not have any units transmitted with them as this will cause an "unrecognized command" error. Responses to queries in the TEXT ON (long format) mode are followed by the unit transmission format indicated in the table, In the TEXT OFF (short format) only the numbers are transmitted.

  • Page 35: Power On Defaults3

    POWER ON DEFAULTS The following table indicates the factory default conditions that are in effect every time the load is switched on. This can be re-configured by the user in memory location zero (0). PARAMETER SETTING Mode Constant current Relay Open Short Text...
  • Page 36 The basis of the MCL488 syntax is the instrument control command. Each command sends an instruction to the Dynaload. A query command requests information from the Dynaload. Each element of the load syntax command consists of two or more letters or a combination of letters and numbers.
  • Page 37 allowing multiple commands to be sent in a single command line. Commands can be chained by inserting a semi-colon (;) or colon (:) as a separator. This allows for faster commanding and reduces the per command overhead. Limitations to command chaining are as follows: The total length of the command string (including separator characters and spaces) needs to be less than 72 characters.

  • Page 38: Syntax3

    SYNTAX Note: Characters may be either upper or lower case. Spaces and Items in brackets,"[ ]" are optional. LOAD OPERA TING MODES CI x constant current mode with current set to x amps CV x constant voltage mode with voltage set to x volts CRL/CRH x E n t e r constant resistance value to x ohms AVH/AVL x E n t e r constant resistance vale in amps/volt CP x...

  • Page 39: Relay Control3

    RELA Y CONTROL LOAD ON Close the load connect relay LOAD OFF Open the load connect relay MISCELLANEOUS S e l e c t s channel x as the active channel. SHORT ON Enter the loads electronic short circuit mode SHORT OFF Leave the loads electronic short circuit mode R e s e t...

  • Page 40: Readbacks3

    READBACKS the current through the load the power dissipating in the load the voltage across the load MULTI-CHANNEL COMMANDS ALL I? Read the currents for all modules ALL P? Read the power dissipations for all modules ALL V? Read the Voltages across all modules PS ON Execute the SW or WF command to all modules PS OFF...

  • Page 41: Queries3

    QUERIES the programmed current the programmed voltage the programmed power the programmed resistance(ohms) the Programmed resistance(amps/volt) the square wave frequency DU?,D2? R e a d the square wave duty cycle (second pulse level) the square wave duty cycle (third pulse level) the T1 time value the T2 time value the T3 time value...

  • Page 42: Language Elements (Command Listing With Complete Descriptions)

    LANGUAGE ELEMENTS This section is an alphabetical listing that gives the syntax and required parameters for all elements in the programmable load's syntax. The syntax functions and forms are generic for all MCL488 module ratings. The following section provide the information below for each command: DESCRIPTION: Indicates the type of command and provides a brief explanation of its function.
  • Page 43 READBACKS DESCRIPTION: Query used to read back the current through the currently selected channel SYNTAX: RETURNED PARAMETERS: TEXT ON: < N R 2 > amps TEXT OFF: < N R 2 > DESCRIPTION: used to read back the power dissipation in the currently selected channel SYNTAX: RETURNED PARAMETERS:...
  • Page 44 DESCRIPTION: LOAD COMMAND used to set the base resistance to the specified amps/volt value. NOTE: AVL or AVH must have been previously set. SYNTAX: <NR2> EXAMPLE: The resistance level AV1 is set to 2 amps/volt QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: < N R 2 > amps/v TEXT OFF: <NR2>...
  • Page 45 DESCRIPTION: MODE COMMAND that places the programmable load in its constant resistance high amps/volt mode at the value specified. SYNTAX: <NR2> EXAMPLE: AVH 5 This command places the load in its constant resistance mode at an input resistance of 5 amps/volt. QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: <...

  • Page 46: Ci ( C O N S T A N T Current Setting)

    DESCRIPTION: MODE COMMAND that places the programmable load in its constant current mode at the value specified. SYNTAX: <NR2> EXAMPLE: CI 10.5 This command places the load in its constant current mode. set to regulate 10.5 amperes. QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: < N R 2 > AMPS TEXT OFF: <NR2>...
  • Page 47 DESCRIPTION: MODE COMMAND that places the programmable load in its constant resistance high ohms mode at the value specified. SYNTAX: <NR2> EXAMPLE: CRH 100 This command places the load in its constant resistance mode, at an input resistance of 100 ohms. QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON : <NR2>...

  • Page 48: Cv ( C O N S T A N T Voltage Setting)

    DESCRIPTION: MODE COMMAND that places the programmable load in its constant voltage mode at the value specified. SYNTAX: <NR2> EXAMPLE: CV 100.0 This command places the load in its constant voltage mode. set to regulate 100 volts, QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON : <NR2> volts TEXT OFF : <NR2>...

  • Page 49: D2 ( D U T Y Cycle Setting)

    DESCRIPTION: COMMAND used to set the duty cycle of a waveform. Same as DU. SYNTAX: <NR2> EXAMPLE: D2 40 This command establishes the duty cycle in Pulse Mode. It is the percent of the total period for which level 12 P2, R2 or V2 is in effect, In this example that is 40% of the total period.

  • Page 50: Fq ( F R E Q U E N C Y Setting)

    DESCRIPTION: COMMAND used to set the frequency of a waveform. SYNTAX: <NR2> EXAMPLE: FQ 1000 This command establishes the frequency in the pulse mode of operation at 1000 Hertz. QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: < N R 2 > Hz TEXT OFF: <...
  • Page 51 DESCRIPTION: LOAD COMMAND used to set the peak current in pulse mode. NOTE: In DELTA mode. the 12 current is summed on top of the 1 1 current. For Example: If 11=10 amps and 12=50 amps, the actual pulse is between 10 amps and 60 amps.

  • Page 52: Text Off:

    DESCRIPTION: LOAD CONTROL COMMAND that sets the indicated bits in the latched fault mask. When a bit is set in the latched fault mask, an abnormal condition in the load condition register will be latched until read by the computer. SYNTAX: LAT <NR1>...

  • Page 53: Load Off

    LOAD OFF DESCRIPTION: LOAD CONTROL COMMAND that opens the loads power handling contactor, isolating the E+ input studs from the power dissipating circuitry. SYNTAX: LOAD OFF RELATED QUERY: LOAD? RESPONSE PARAMETERS: TEXT ON: LOAD OFF TEXT OFF: 0 LOAD ON DESCRIPTION: LOAD CONTROL CONMAND that closes the load's power handling contactor.

  • Page 54: Lock On ( F R O N T Panel Lockout)

    LOCK ON DESCRIPTION: CONTROL COMMAND that locks out the front panel. SYNTAX: RELATED QUERY: RESPONSE PARAMETERS: T E X T ON: LOCK ON TEXT OFF: 1 DESCRIPTION: COMMAND recalls the setup stored in location "x" SYNTAX: <NR2> EXAMPLE: Recalls the setup stored in memory location 3. QUERY SYNTAX: RETURNED PARAMETERS: N O N E DESCRIPTION:...

  • Page 55: P2 ( C O N S T A N T Power Peak Setting)

    DESCRIPTION: MODE COMMAND that places the programmable load in its constant power mode at the value specified. In pulse mode, this is the base power setting. SYNTAX: <NR2> EXAMPLE: The power level P1 is set to 253 watts QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: <...

  • Page 56: P3 ( C O N S T A N T Power Peak 3 Setting)

    DESCRIPTION: LOAD COMMAND used to set the peak power in pulse mode. NOTE: In DELTA mode, the P3 power is summed on top of the P1 and P2 power. For Example: If P1=100 watts, P2=150 watts, and P3 = 50 watts, the actual pulse is from 100 watts to 250 watts to 300 watts.

  • Page 57: Ps On

    PS ON DESCRIPTION: LOAD CONTROL COMMAND used to execute the SW or WF command to all modules simultaneously. SYNTAX: QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: P S ON TEXT OFF: < N R 2 > PS OFF DESCRIPTION: CONTROL COMMAND used to execute the SW OFF command to all modules simultaneously.
  • Page 58 DESCRIPTION: LOAD COMMAND Used to set the amplitude of the peak loading in constant resistance pulse mode. In DELTA mode, the resistance will be added in parallel to the base resistance. NOTE: CRL or CRH must have been previously specified to set the mode. SYNTAX: <NR2>...

  • Page 59: Rec ( M E M O R Y Recall)

    DESCRIPTION: COMMAND recalls the setup stored in location "x". Identical to MR command. SYNTAX: <NR2> EXAMPLE: Recalls the setup stored in memory location 3. QUERY SYNTAX: RETURNED PARAMETERS: N O N E DESCRIPTION: CONTROL COMMAND that returns the programmable load to its power on reset condition (as set in memory location zero) with the load contactor off (LOAD OFF).
  • Page 60 DESCRIPTION: LOAD COMMAND used to set the slew rate limit in all modes, including remote programming. The value specified is the number of microseconds it will take to slew from zero to full scale. Command is identical to S1 and SR. SYNTAX: <N R2>...
  • Page 61 DESCRIPTION: CONTROL COMMAND that sets the indicated bits in the summary bit enable register mask. When a bit is set in the summary bit enable register, an abnormal condition in the load condition register will be passed through to the status register.
  • Page 62 DESCRIPTION: LOAD CONTROL COMMAND that sets the indicated bits in the shutdown mask. When a bit is set in the shutdown mask, an abnormal condition in the status register will shut the load down. SYNTAX: SDN <NR1> EXAMPLE: Each of the bits in the shutdown mask register have a decimal weight as indicated in the table below.
  • Page 63 DESCRIPTION: LOAD CONTROL COMMAND that sets the indicated bits in the IEEE-488 bus SRQ mask, When a bit is set in the SRQ mask, an abnormal condition in the status register will cause a service request. SYNTAX: SRQ <NR1> EXAMPLE: Each of the bits in the SRQ mask register have a decimal weight as indicated in the table below.

  • Page 64: Sf ( S C A L E Factor)

    DESCRIPTION: MODE CONTROL COMMAND used to alter the timing characteristics of the pulse generator by pre- scaling the timing clock. When long duration pulsing is required, setting the scale factor (SF) greater than 1 will increase the maximum duration by that factor. NOTE: Pulse resolution is decreased by the factor, and the minimum pulse duration is increased by the factor.

  • Page 65: Short On

    SHORT ON DESCRIPTION: CONTROL COMMAND that forces the load to a saturated condition presenting the lowest possible electronic impedance to the source under test. NOTE: Unit under test must have a current limit less than the current rating of the load. The undervoltage lockout must be disabled. SYNTAX: RELATED QUERY: S H O R T ?

  • Page 66: Sw ( P U L S E Generator

    DESCRIPTION: MODE CONTROL COMMAND used to set the slew rate limits. Slew time for a full scale transition is set to the value specified. SYNTAX: <NR2> EXAMPLE: SR 200 Sets the maximum rise or fall time to 200pS for a 0 - full scale transition.

  • Page 67: Text Off: 0

    SYNTAX: QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: OFF TEXT OFF: 0 SYS ON DESCRIPTION: LOAD COMMAND which causes LOAD OFF and LOAD ON commands to affect all channels simultaneously. SYNTAX: QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: ON TEXT OFF: 1 DESCRIPTION: LOAD COMMAND which establishes time duration...
  • Page 68 DESCRIPTION: LOAD COMMAND which establishes time duration in pulse mode. T2 is the time that the second load level is active. SYNTAX: <NR1> EXAMPLE: 1000 Sets second peak loading duration to 1000 [IS QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: < N R 1 > [IS TEXT OFF: <NR1>...

  • Page 69: Text On

    TEXT ON DESCRIPTION: LOAD CONTROL COMMAND that returns all the responses from the load in the form of text strings. and/or values. SYNTAX: RELATED QUERY: RETURNED PARAMETERS: T E X T ON: None TEXT OFF: None TP OFF DESCRIPTION: COMMAND which disables three level pulsing, returning load to normal square wave mode.
  • Page 70 SYNTAX: QUERY SYNTAX: RETURNED PARAMETERS: T E X T ON: OFF TEXT OFF: 0 UV ON DESCRIPTION: LOAD COMMAND enables the input undervoltage protection. When active, the load will remain inhibited until there is approximately 1 volt present at the input studs. SYNTAX: UV ON UV OFF...
  • Page 71 RETURNED PARAMETERS: T E X T ON: < N R 2 > volts TEXT OFF: <NR2> DESCRIPTION: MODE COMMAND that places the programmable load in its constant voltage mode at the value specified. In pulse mode, this is the base voltage. NOTE: When pulsing in constant voltage mode, higher voltage corresponds to less load.
  • Page 72 the example under V1 above, in DELTA mode, the voltage levels pulse from 25 volts to 19.7 volts. In ABSOLUTE mode, the voltage levels pulse from 25 volts to 5.3 volts. QUERY SYNTAX: RETURNED PARAMETERS: TEXT ON: < N R 2 > volts TEXT OFF: <NR2>...
  • Page 73 omitting the number. NOTE: After the specified number of pulses are complete, the load continues to operate at the base value. WF OFF stops pulsing. SYNTAX: <NR-I> EXAMPLE: WF 7 Enters pulse mode, generates 7 pulses, then exits pulse mode QUERY SYNTAX: RETURNED PARAMETERS: N o n e DESCRIPTION:...
  • Page 74 RETURNED PARAMETERS: T E X T ON: None TEXT OFF: None STATUS & ERROR REPORTING The load status drawing shows the logical relationship between the status registers. Three of the registers, the condition (CON) register, the error (ERR) register, and the status (STA) register reflect the condition of the load. Two of the registers, the fault shutdown mask (SDN) and the fault latch mask (LAT) control which of the condition register bits cause a load shutdown (shutdown mask) and/or are latched until read (latch mask).

  • Page 75: Bit

    CONDITION, LATCH, SHUTDOWN AND SUMMARY BIT ENABLE REGISTER MNEMONIC INTERPRETATION Indicates an under voltage condition Indicates an over voltage condition Indicates an over temperature condition CRIB ERROR Indicates a CRIB bus error Indicates current limit condition Indicates a power limit condition Indicates a load or module saturation condition Indicates AC power fault ERROR REGISTER...
  • Page 76 the loads input buffer. 3 N u m e r i c number has been received that can not be interpreted for example, 3.14A2 instead of 3.14. 2 R e s e r v e d Reserved for future use 1 R a n g e A numerical value either too low or too high has been received.
  • Page 77 Fault Shutdown Mask Latched Fault Mask Controls which bits Controls which CON L o a d Condition S u m m a r y Bit System Status in CON cause a bits get latched R e g i s t e r E n a b l e Register Register...
  • Page 78 ALL I? DESCRIPTION: Query used to read back the currents through all channels. This returns a comma-delimited string of 10 values. Each value is the current in Amps. The first value is for CHO and the last being CH9. Channels configured as a slave or not installed will return a 0.0.
  • Page 79 CON? DESCRIPTION: LOAD STATUS QUERY that reports the contents of the load's condition register. SYNTAX: RESPONSE PARAMETERS: TEXT ON: an ASCII string corresponding to each of the bits that are set in the register (see table). The individual responses are separated by commas.
  • Page 80 ERR? DESCRIPTION: LOAD STATUS QUERY that reports the contents of the load's command error register. SYNTAX: RESPONSE PARAMETERS: TEXT ON: an ASCII string corresponding to each of the bits are set in the register (see table). The individual responses are separated by commas.
  • Page 81 MODE? DESCRIPTION: LOAD STATUS QUERY that reports the loads operating mode. SYNTAX: RESPONSE PARAMETERS: TEXT ON: an ASCII string corresponding to each of the bits that are set in the register (see table). The individual responses are separated by commas TEXT OFF: <NR1>...

  • Page 82: Change In Status

    STA? DESCRIPTION: LOAD STATUS QUERY that reports the contents of the status (serial poll) register. SYNTAX: RESPONSE PARAMETERS: TEXT ON: an ASCII string corresponding to each of the bits are set in the register (see table). The individual responses are separated by commas.
  • Page 83 Appendix A...
  • Page 84 1/4-20 INPUT STUDS .125 - 4 - 25.1 24.00 24.00 - O N • 10.05 AIR FLOW • • • • • 10-32 SLIDE MOUNTING HOLES FOR JONATHAN SLIDE 11000-24-2 (NOT PROVIDED) 1700 0 IW • . • • I . •...
  • Page 85 20.10 19.00 5 ' 5 1 155 0 in 0055= rl obei n no i l o nec5t o r_i m gm M M E c P 5 omme • i i n n u g u d n a u E I . 7 , , , , , , , , , i - m 0 T i a i u r . i n a r o 3 n o m ri al i n I:1 al .
  • Page 86 Appendix B...

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