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VXI VT1538A user manual

Models: VT1538A

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VXI VT1538A user manual

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ENHANCED FREQUENCY/TOTALIZE/ PWM SIGNAL CONDITIONING PLUG-ON 82-0093-000 Release April 28 VXI Technology, Inc 2031 Main StreetIrvine, CA 949 VT1538AVXI Technology, Inc INTRODUCTION Dynamic DAC ProductsStatic DAC Products VXI Technology Cleveland Division SUPPORT RESOURCESVXI Technology World Headquarters VXI Technology Lake Stevens Instrument DivisionAgilent Technologies E1538A Enhanced Frequency/Totalize/PWM User’s and SCPI Programming ManualSignal Conditioning Plug-on Agilent 75000 Series CPage About this Manual Agilent E1538A Enhanced Frequency/Totalize/PWM SCPIntroduction Identifying the Plug-on IMPORTANT Setting Configuration Switches Configuring Input- Output directionConfiguring Channel Pull-up Resistor Installation Connecting To The Terminal ModuleRecommended Signal Connections Figure 4. E1419A Option 11 Terminal Module Connections8 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Input and Output Characteristics VRS Mode Input Operation SCP channels 0 & 1 only Programming With SCPI Commands Setting the Input Threshold Level Configuring the ChannelsConfiguring I/O Direction Checking the ID of the SCPDetermining the Input Threshold Level returns threshold valueReading Static Digital State To set channels 40 through 43 to input digital statesTotalize Positive or Negative Edge State Changes About Period and Frequency Measurements To measure frequency at channel 45 with aperture of 1 second For PERiod function, the E1538 spports two distinct measurement ranges To measure period at channel 45 as the average of 1000 signal periods Agilent E1538A Enhanced Frequency/Totalize/PWM SCPchlist specifies the channels that will read pulse widths Sense Quadrature Position The value read by the algorithm can range from Example of Rotational Velocity Sense Programming Output Channels Controlling Output PolarityOutput Static Digital State Variable Width Pulse Per Trigger Variable Width Pulse Train PWM Figure 17. Output Pulse-Width-Modulated Signal26 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Variable Frequency Fixed Width Pulse Train FM Variable Frequency Square-Wave Pulse Train FM Figure 19. Output Square Wave Variable Frequency FM28 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Rotationally Positioned Pulse Output Rotational Pulse Command Usage Variable Angular Position, Preset Pulse Width by angle Rotational Pulse ModeFigure 21. Variable Position, Width Preset by Angle Variable Angular Position, Preset Pulse Width by timeExample of variable position, preset width Rotational Pulse ModeRotational Pulse Mode Variable Pulse Width by angle, Preset Angular PositionFigure 22. Variable Position, Width Preset by Time Agilent E1538A Enhanced Frequency/Totalize/PWM SCPExample of variable width by angle, preset position 34 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPVariable Pulse Width by time, Preset Angular Position Example of variable width by time, preset positionRotational Pulse Mode Figure 24. Fixed Position, Variable Width by Time preset ch 46 pulse width to 10mspreset ch 47 pulse width to 15ms 36 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPStepper Motor Control Use the command motor phase channel group can not be split across SCPs Figure 27. Full Step Mode, Full and Half Speed, 4-Channel Figure 28. Half Step Mode, Full Speed, 4-ChannelAgilent E1538A Enhanced Frequency/Totalize/PWM SCP Figure 29. Directly Driving 4-Phase Stepper Motors 40 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPRST and *TST important Agilent E1538A Enhanced Frequency/Totalize/PWM SCPFor newer SCPI Command ReferenceCommand Syntax PagePage Command SyntaxFor newer units onlyParameters INPutPOLarityINPutPOLarity? CommentsINPutTHResholdLEVel? level can be set to a resolution ofINPutTHResholdLEVel ParametersSend with VXIplug&play Function hpe14XXcmdReal64Q OUTPutPOLarityOUTPutPOLarity? generatedParameters SENSeFREQuencyAPERtureRST Condition .001 sec Send with VXIplug&play Function hpe14XXcmd CommentsSENSeFREQuencyLIMitLOWer Related Commands SENSFREQAPERSENSeFREQuencyAPERture? ParametersINIT Send with VXIplug&play Function hpe14XXcmdSENSeFUNCtionCONDition Related Commands INPutPOLaritySENSeFREQuencyLIMitLOWer? Returned Value .01667 to 250, The type is float32Parameters SENSeFUNCtionFREQuencySENSeFUNCtionPERiod ParametersParameters SENSeFUNCtionPWIDthSENSeFUNCtionQUADrature CommentsSend with VXIplug&play Function hpe14XXcmd SENSeFUNCtionRVELocityParameters Usage See “Sense Quadrature Position” on pageUsage See “Sense Rotational Velocity” on page ParametersSend with VXIplug&play Function hpe14XXcmd 54 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSend with VXIplug&play Function hpe14XXcmd SENSeFUNCtionTOTalizeParameters Usage See “Totalize Positive or Negative Edge State Changes” on pageSENSePERiodAPERture ParametersRST Condition .001 sec Send with VXIplug&play Function hpe14XXcmd Parameters SENSePERiodAPERture?SENSePERiodLIMitUPPer ParametersSend with VXIplug&play Function hpe14XXcmd 58 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPRST Condition is “APERture” SENSePERiodLIMitUPPer?SENSePERiodMODE ParametersSENSePERiodNPERiods Related Commands SENSePERiodMODESENSePERiodMODE? interval mode currently set for period measurementSend with VXIplug&play Function hpe14XXcmdInt32Q SENSePERiodNPERiods?SENSePERiodRANGeUPPer ParametersRST Condition is Send with VXIplug&play Function hpe14XXcmd SENSeTOTalizeRESetMODESENSePERiodRANGeUPPer? ParametersParameters SENSeTOTalizeRESetMODE?SOURceFMSTATe CommentsParameters SOURceFMSTATe?Send with VXIplug&play Function hpe14XXcmdInt16Q CommentsSOURceFUNCtionRPULse ParametersParameters SOURceFUNCtionSHAPeCONDitionSOURceFUNCtionSHAPePULSe ParametersComments Send with VXIplug&play Function hpe14XXcmd SOURceFUNCtionSHAPeSQUareSOURceFUNCtionSTEPper ParametersTable 3. Stepping mode values Figure 31. Relationship of minvel, and maxvel68 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Send with VXIplug&play Function hpe14XXcmd SOURcePULMSTATeParameters Send with VXIplug&play Function hpe14XXcmdParameters SOURcePULMSTATe?SOURcePULSePERiod ParametersParameters SOURcePULSePERiod?SOURcePULSeWIDTh Parameters33,554,430 to 33,554,430 SOURcePULSeWIDTh?SOURceRPULsePOSitionANGLe ParametersUsage SOURceRPULsePOSitionANGLe?SOURRPULseVARType ParametersParameters SOURRPULseVARType?SOURceRPULseWIDThANGLe Parameters00000787 to SOURceRPULseWIDThANGLe?SOURceRPULseWIDThTIME ParametersUsage SOURRPULSEWIDTTIME? @147 SOURceRPULseWIDThTIME?Parameters 76 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPOutput Characteristics SpecificationsGeneral Specifications Input CharacteristicsTotalizer 1 mSec to 1 Second, resolutionResolution Hz Frequency MeasurementFrequency Source Rotational Velocity MeasurePulse Width Measure Pulse Source80 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP CharacteristicsRotational Pulse Source Extra Tooth Wheel