Xantrex Technology XMP 2600 Current limiting schemes, Foldback, Polarity and disconnect relays

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Current limiting schemes

Basic Programming

Polarity and disconnect relays

Issuing the OUT 0 command, globally disables the outputs of all the Power Modules.

Turning the output on or off

Use the OUT <ch>,1 command to turn on the output of a specific Power Module.

Not that only if the other conditions mentioned at the top of this section are met then the Power Module’s output will be activated.

Use the OUT <ch>,0 command to turn off the output of a specific Power Module.

Each XMP 2600 Power Module has two sets of output relays: disconnect and polarity reversal.

Disconnect relays

The output disconnect relays are operated using the DISC <ch>,<mode> command, where <mode> can be either 1 for disconnect or 0 for connect.

Polarity reversal relays

The output polarity reversal relays are operated using the POL <ch>,<mode> command, where <mode> can be either 1 for negative or 0 for positive.

Auto polarity

The auto-polarity programming feature allows for the output voltage settings to be programmed as either a positive or a negative value.

When auto polarity is enabled, the polarity of the programmed Vset value automatically controls the state of the polarity reversal relays.

While auto polarity is enabled and the polarity of the corresponding output is reversed, voltage readback values have a minus sign preceding them.

To enable auto polarity, issue the POLEN 1 command. To disable auto polarity, issue the POLEN 0 command.

Current limiting schemes

Voltage / current mode

Foldback

The Power Modules of the XMP 2600 have 5 different output current limiting schemes. The following sections describe each of those schemes.

The output current limiting scheme is selected using the FOLD <ch>,<mode> command, where mode can have a value between 0 and 4.

This output current limiting scheme, selected using

 

mode = 0 (FOLD <ch>,0), instructs the Power Module to

V

operate as either a voltage source or a current source with

 

automatic switching between the two modes of operation.

Vset

This, default mode, is the most commonly used output

operating

range

current limiting scheme. The window workpoint warning

 

 

 

I

 

 

 

 

 

 

feature can be used in combination with this output current

 

 

 

 

limiting scheme to give you a more tight control over the

 

Iset

load’s behavior.

 

 

 

 

Foldback is an output current limiting scheme in which both output voltage and output current are reduced when the Power Module is operating as a current source (current limitation is active).

There are two types of output foldback to choose from: linear and non-linear.

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XMP 2600 Programming Manual rev. 1.1

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Contents Xantrex Multiple Output Power System XMP XMP How do you get service? Limited What does this warranty cover and how long does itWarranty Last?Disclaimer Product What does this warranty not cover?Information Information About Your Power SupplySafety Summary Description Power Supply SymbolsPower Supply Grounding Output Voltages Input Mains Voltage RatingDo Not Open The Unit Air Inlets And Air Outlet Nonoperative ModulesSafety Agency Compliance Regulatory Approvals and Safety Agency CompliancePower Supply Safety Regulatory ApprovalsAbout this manual Chapters TerminologyWho should use this manual Table of contents Basic Programming Commands and Queries Reference Byte Error Codes summaryGpib interface 1Interfacing XMPACK Serial interfaceListening Formats Programming messages formatsResponse Data Separator Talking FormatsUsing the comm. channels How to communicate with the XMPUsing the Gpib bus Using an RS232 linkUsing queries Recovering from communication haltsUsing commands Programming the XMPInitialize the XMP Recommendations on using the XMPSetup the XMP 2600 status system Enforce power-on conditionsQuery installed Power Modules Identify the XMPInitial setup of the Power Modules Setup system level protection shutdown featuresOutput settings Protection setupActivation Status reportingHandling SRQ and the IEEE488.2 Status Structures Using advanced featuresOn-going usage of the XMP Use queriesStatus registers Event enable registersEvent registers Mask registersMain controller events Main status byteOutput message Queue Responding to SRQ eventsPower modules status structure Summary of power modules statusRemote communication time out Primary engine status structureError Code What happens when power is turned onFaults Register Events RegisterUsage Guidelines Output Setup Basic setup and usageOverview of output setup parameters Power Module output ratingOutput control Output settingsOutput activation Globally enabling the outputsCurrent limiting schemes Voltage / current modeFoldback Polarity and disconnect relaysRetry Reprogramming DelayShutdown on current limit Linear foldbackBasic Programming Workpoint window warning Setting the window thresholdsUsage guidelines Enabling the window thresholdsUsing the warnings Using the events mechanismVoltage mode example Checking the statusLoad protection Protection using the workpoint windowAdditional usages OVPTrigger mechanism Arm, trigger, sync and rampSet output to stored values Toggle the output state on/offSync output Output ramping What is output ramping?Synchronization of operations Output ramping setupOutput ramping initiation Simultaneous operationsOutput on/off Using hardware Trig and Sync to serialize operationsOther operations Sequential OperationsController notification of Operation Complete Using software OPC mechanism to serialize operationsSelective shutdown Commands to program shutdown groupingShutdown grouping single, group, global Different shutdown grouping of modulesShutdown on non-fault events Responding to communication time out eventsComm. time out Time out events as reflected in the status structure Turn-on and reset behaviorIeee 488.1 BUS Commands System Commands QueriesCategories Glbl ResetGLBL? GpibSettings Commands Queries Output Control Protection Commands Queries Trigger Sync Commands QueriesRead-Back Queries Status Reporting Commands Queries Synch Mnemonic Alphabetical referenceParameters None Category System Type Sequential PRE Stores settings of all the Power Modules same as STO command Result register Syntax Return two decimal numbers, in the range 0 to 255. Each bit Cmask Close relay and a value of 1 is returned for an open relay Remove a user message from the XMP 2600 front panel display Set-up the operating mode of the XMP 2600. Re-calculate rqs Response is a series of values one for each installed Power Return output Current measurement of the Power Module. Return the state of the XMP 2600 Local Lock Flag. a value Ocrst Decimal value in the range 0 to Syntax Presence of the Polarity Reversal Relay Option Parameters None Category Settings Type Sequential Master mainframe. For the XMP 2600 this value is String in the following format mssnnn where m=minutes Result is two decimal numbers the first being the level 0t o SN? = Goto = OFF= Stop Module. Result is a decimal number in the range 0 to Shut-down when a remote communication time out occurs. Time out feature Syntax Minus sigh Syntax VLIM? Vset Commands and Queries Reference Events Register Ieee 488.2 compatible Status StructuresError Code Faults RegisterEvents Enable Register Output RegisterEvents Filtering Negative Mask Register Events Filtering Positive Mask RegisterPON CME EXE DDE QYE OPC Standard Event Status Register read with *ESR?Primary Event Status Register read with PER? Primary Status Register read with PSR?Primerr Status Byte Register read with *STB?Self Test Results Power ModulesMain Controller BytePower Modules Errors Reported by the Power Module Error Codes summaryErrors Detected by the Main Controller Main Power Modules Communications errorsRS232 Communications errors Gpib Communications errorsParser and Execution errors Status reporting Xantrex Technology Inc
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