ALGSCALAR’ALG1’,’Width2’,.010 | VXI VT1538A manual

SOUR:RPULSE:POS:ANGL 140,(@146) SOUR:RPULSE:POS:ANGL 260,(@147) SOUR:RPULSE:VART TIME,(@145:147)

preset channel 46 pulse position to 140 degrees

preset channel 47 pulse position to 260 degrees

algorithm will control pulse duration by TIME

Algorithm outputs pulses on all three channels with preset duration.

ALG:DEF ’ALG1’,’static float Width1, Width2, Width3;O145 = Width1; O146 = Width2; O147 = Width3;’

ALG:SCALAR’ALG1’,’Width1’,.005	preset ch 45 pulse width to 5ms
ALG:SCALAR’ALG1’,’Width2’,.010	preset ch 46 pulse width to 10ms
ALG:SCALAR’ALG1’,’Width3’,.015	preset ch 47 pulse width to 15ms
ALG:UPDATE
INIT	start algorithm execution
•

•

•

ALG:SCALAR 'ALG1','Width1',NewWidth1

ALG:SCALAR 'ALG1','Width2',NewWidth2

ALG:SCALAR 'ALG1','Width3',NewWidth3

ALG:UPDATE

calculate NewWidth(n)

later, adjust channel 45’s width while algorithm is running later, adjust channel 46’s width while algorithm is running later, adjust channel 47’s width while algorithm is running values in update queue sent to variables

Figure 24. Fixed Position, Variable Width by Time

36 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP

Image 40

VXI VT1538A user manual ALGSCALAR’ALG1’,’Width2’,.010

Contents

VT1538A VXI Technology, Inc Introduction Support Resources User’s and Scpi Programming Manual Page Agilent E1538A Enhanced Frequency/Totalize/PWM SCP About this Manual Introduction Identifying the Plug-on Important Setting Configuration Switches Switch Location and Example Settings Installation Connecting To The Terminal Module Recommended Signal Connections E1419A Option 11 Terminal Module Connections Input and Output Characteristics Recommended Connections and Voltage Limits VRS Mode Input Operation SCP Channels 0 & 1 only E1538A Input/Output Characteristics Programming With Scpi Commands Shows the VRS mode input characteristics Configuring I/O Direction Setting the Input Threshold Level Determining the Input Threshold Level Inppol Norm Reading Static Digital State To set channels 40 through 43 to input digital states Totalize Positive or Negative Edge State Changes Init SENSDATACVT? @44 About Period Frequency Measurements SENSDATACVT? @45 SENSDATACVT? @45 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Agilent E1538A Enhanced Frequency/Totalize/PWM SCP Sense Quadrature Position Sensfuncquad 0,@148,149 RPS Example of Rotational Velocity Sense Sense Rotational Velocity Controlling Output Polarity Output Static Digital State Variable Width Pulse Per Trigger Variable Width Pulse Train PWM Variable Frequency Fixed Width Pulse Train FM Variable Frequency Square-Wave Pulse Train Rotationally Positioned Pulse Output Rotational Pulse Command Usage Algupdate Init Example of variable position, preset width RST Sensfuncrvel 12,MISS,@140 Variable Position, Width Preset by Time Example of variable width by angle, preset position Example of variable width by time, preset position Fixed Position, Variable Width by Angle ALGSCALAR’ALG1’,’Width2’,.010 Stepper Motor Control Use the command Stepping mode values Sensfuncvolt @100 Full Step Mode, Full and Half Speed, 4-Channel Page RST and *TST important Scpi Command Reference Command Syntax For newer Units only Command Syntax For newer Units only Discussed INPutPOLarity INPutPOLarity?Parameters Comments INPutTHResholdLEVel Level can be set to a resolutionINPutTHResholdLEVel? OUTPutPOLarity? OUTPutPOLaritySend with VXIplug&play Function hpe14XXcmdReal64Q SENSeFREQuencyAPERture SENSeFREQuencyAPERture? Related Commands SensfreqaperSENSeFREQuencyLIMitLOWer Init SENSeFREQuencyLIMitLOWer? Related Commands INPutPOLaritySENSeFUNCtionCONDition SENSeFUNCtionFREQuency SENSeFUNCtionPERiod SENSeFUNCtionPWIDth SENSeFUNCtionQUADrature SENSeFUNCtionRVELocity RPS SENSeFUNCtionTOTalize SENSePERiodAPERture SENSePERiodAPERture? SENSePERiodLIMitUPPer Init SENSePERiodLIMitUPPer? SENSePERiodMODE SENSePERiodMODE? Related Commands SENSePERiodMODESENSePERiodNPERiods SENSePERiodRANGeUPPer SENSePERiodNPERiods?Send with VXIplug&play Function hpe14XXcmdInt32Q SENSePERiodRANGeUPPer? SENSeTOTalizeRESetMODERST Condition is Send with VXIplug&play Function hpe14XXcmd SENSeTOTalizeRESetMODE? SOURceFMSTATe SOURceFMSTATe? Send with VXIplug&play Function hpe14XXcmdInt16Q SOURceFUNCtionRPULse SOURceFUNCtionSHAPeCONDition SOURceFUNCtionSHAPePULSe SOURceFUNCtionSTEPper SOURceFUNCtionSHAPeSQUareComments Send with VXIplug&play Function hpe14XXcmd Relationship of minvel, and maxvel SOURcePULMSTATe Usage See Stepper Motor Control on SOURcePULMSTATe? SOURcePULSePERiod SOURcePULSePERiod? SOURcePULSeWIDTh SOURceRPULsePOSitionANGLe SOURcePULSeWIDTh?33,554,430 to 33,554,430 SOURRPULseVARType SOURceRPULsePOSitionANGLe?Usage SOURRPULseVARType? SOURceRPULseWIDThANGLe SOURceRPULseWIDThTIME SOURceRPULseWIDThANGLe?00000787 to SOURceRPULseWIDThTIME? Specifications General Specifications Frequency Measurement Pulse Width Measure Rotational Pulse Source