VXI VT1538A user manual

Contents 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 chlist 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 32 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPVariable Pulse Width by angle, Preset Angular Position Figure 22. Variable Position, Width Preset by TimeExample 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 positionFigure 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-ChannelFigure 29. Directly Driving 4-Phase Stepper Motors 40 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPRST and *TST important For newer SCPI Command ReferenceCommand Syntax PageDiscussed Parameters INPutPOLarityINPutPOLarity? Commentslevel can be set to a resolution of INPutTHResholdLEVelINPutTHResholdLEVel? Send with VXIplug&play Function hpe14XXcmdReal64Q OUTPutPOLarityOUTPutPOLarity? generatedSENSeFREQuencyAPERture RST Condition .001 sec Send with VXIplug&play Function hpe14XXcmdRelated Commands SENSFREQAPER SENSeFREQuencyAPERture?SENSeFREQuencyLIMitLOWer INIT SENSeFUNCtionCONDition Related Commands INPutPOLaritySENSeFREQuencyLIMitLOWer? Returned Value .01667 to 250, The type is float32SENSeFUNCtionFREQuency SENSeFUNCtionPERiodSENSeFUNCtionPWIDth SENSeFUNCtionQUADratureSENSeFUNCtionRVELocity Usage See “Sense Quadrature Position” on pageUsage See “Sense Rotational Velocity” on page 54 Agilent E1538A Enhanced Frequency/Totalize/PWM SCPSENSeFUNCtionTOTalize Usage See “Totalize Positive or Negative Edge State Changes” on pageSENSePERiodAPERture SENSePERiodAPERture? SENSePERiodLIMitUPPer58 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP RST Condition is “APERture” SENSePERiodLIMitUPPer?SENSePERiodMODE SENSePERiodMODE mode,@chlist selects the measurementSENSePERiodNPERiods Related Commands SENSePERiodMODESENSePERiodMODE? interval mode currently set for period measurementSENSePERiodNPERiods? SENSePERiodRANGeUPPerSend with VXIplug&play Function hpe14XXcmdInt32Q SENSeTOTalizeRESetMODE SENSePERiodRANGeUPPer?RST Condition is Send with VXIplug&play Function hpe14XXcmd SENSeTOTalizeRESetMODE? SOURceFMSTATeSOURceFMSTATe? Send with VXIplug&play Function hpe14XXcmdInt16QSOURceFUNCtionRPULse SOURceFUNCtionSHAPeCONDition SOURceFUNCtionSHAPePULSeSOURceFUNCtionSHAPeSQUare SOURceFUNCtionSTEPperComments Send with VXIplug&play Function hpe14XXcmd Table 3. Stepping mode values Figure 31. Relationship of minvel, and maxvel68 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SOURcePULMSTATe Usage See “Stepper Motor Control” on pageSOURcePULMSTATe? SOURcePULSePERiodSOURcePULSePERiod? SOURcePULSeWIDThSOURcePULSeWIDTh? SOURceRPULsePOSitionANGLe33,554,430 to 33,554,430 SOURceRPULsePOSitionANGLe? SOURRPULseVARTypeUsage SOURRPULseVARType? SOURceRPULseWIDThANGLe74 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP SOURceRPULseWIDThANGLe? SOURceRPULseWIDThTIME00000787 to SOURceRPULseWIDThTIME? Usage SOURRPULSEWIDTTIME? @14776 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Output 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