Contents
82-0093-000 Release April 28 VXI Technology, Inc 2031 Main Street
Irvine, CA 949
ENHANCED FREQUENCY/TOTALIZE/ PWM SIGNAL CONDITIONING PLUG-ON
VT1538A
VXI Technology, Inc
Dynamic DAC Products
INTRODUCTION
Static DAC Products
SUPPORT RESOURCES
VXI Technology World Headquarters
VXI Technology Cleveland Division
VXI Technology Lake Stevens Instrument Division
User’s and SCPI Programming Manual
Signal Conditioning Plug-on
Agilent Technologies E1538A Enhanced Frequency/Totalize/PWM
Agilent 75000 Series C
Page
About this Manual
Agilent E1538A Enhanced Frequency/Totalize/PWM SCP
Introduction
Identifying the Plug-on IMPORTANT
Configuring Input- Output direction
Setting Configuration Switches
Configuring Channel Pull-up Resistor
Installation
Connecting To The Terminal Module
Figure 4. E1419A Option 11 Terminal Module Connections
Recommended Signal Connections
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Input and Output Characteristics
VRS Mode Input Operation SCP channels 0 & 1 only
Programming With SCPI Commands
Configuring the Channels
Configuring I/O Direction
Setting the Input Threshold Level
Checking the ID of the SCP
Determining the Input Threshold Level
returns threshold value
Reading Static Digital State
To set channels 40 through 43 to input digital states
Totalize 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
Controlling Output Polarity
Programming Output Channels
Output Static Digital State
Variable Width Pulse Per Trigger
Figure 17. Output Pulse-Width-Modulated Signal
Variable Width Pulse Train PWM
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Variable Frequency Fixed Width Pulse Train FM
Figure 19. Output Square Wave Variable Frequency FM
Variable Frequency Square-Wave Pulse Train FM
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Rotationally Positioned Pulse Output
Rotational Pulse Command Usage
Variable Angular Position, Preset Pulse Width by angle
Rotational Pulse Mode
Variable Angular Position, Preset Pulse Width by time
Example of variable position, preset width
Figure 21. Variable Position, Width Preset by Angle
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Variable Pulse Width by angle, Preset Angular Position
Figure 22. Variable Position, Width Preset by Time
Example of variable width by angle, preset position
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Variable Pulse Width by time, Preset Angular Position
Example of variable width by time, preset position
preset ch 46 pulse width to 10ms
preset ch 47 pulse width to 15ms
Figure 24. Fixed Position, Variable Width by Time
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Stepper 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-Channel
Figure 29. Directly Driving 4-Phase Stepper Motors
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RST and *TST important
SCPI Command Reference
Command Syntax
For newer
Page
Discussed
INPutPOLarity
INPutPOLarity?
Parameters
Comments
INPutTHResholdLEVel
level can be set to a resolution of
INPutTHResholdLEVel?
OUTPutPOLarity
OUTPutPOLarity?
Send with VXIplug&play Function hpe14XXcmdReal64Q
generated
SENSeFREQuencyAPERture
RST Condition .001 sec Send with VXIplug&play Function hpe14XXcmd
SENSeFREQuencyAPERture?
Related Commands SENSFREQAPER
SENSeFREQuencyLIMitLOWer
INIT
Related Commands INPutPOLarity
SENSeFREQuencyLIMitLOWer?
SENSeFUNCtionCONDition
Returned Value .01667 to 250, The type is float32
SENSeFUNCtionFREQuency
SENSeFUNCtionPERiod
SENSeFUNCtionPWIDth
SENSeFUNCtionQUADrature
SENSeFUNCtionRVELocity
Usage See “Sense Quadrature Position” on page
Usage See “Sense Rotational Velocity” on page
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SENSeFUNCtionTOTalize
Usage See “Totalize Positive or Negative Edge State Changes” on page
SENSePERiodAPERture
SENSePERiodAPERture?
SENSePERiodLIMitUPPer
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SENSePERiodLIMitUPPer?
SENSePERiodMODE
RST Condition is “APERture”
SENSePERiodMODE mode,@chlist selects the measurement
Related Commands SENSePERiodMODE
SENSePERiodMODE?
SENSePERiodNPERiods
interval mode currently set for period measurement
SENSePERiodRANGeUPPer
SENSePERiodNPERiods?
Send with VXIplug&play Function hpe14XXcmdInt32Q
SENSePERiodRANGeUPPer?
SENSeTOTalizeRESetMODE
RST Condition is Send with VXIplug&play Function hpe14XXcmd
SENSeTOTalizeRESetMODE?
SOURceFMSTATe
SOURceFMSTATe?
Send with VXIplug&play Function hpe14XXcmdInt16Q
SOURceFUNCtionRPULse
SOURceFUNCtionSHAPeCONDition
SOURceFUNCtionSHAPePULSe
SOURceFUNCtionSTEPper
SOURceFUNCtionSHAPeSQUare
Comments Send with VXIplug&play Function hpe14XXcmd
Figure 31. Relationship of minvel, and maxvel
Table 3. Stepping mode values
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SOURcePULMSTATe
Usage See “Stepper Motor Control” on page
SOURcePULMSTATe?
SOURcePULSePERiod
SOURcePULSePERiod?
SOURcePULSeWIDTh
SOURceRPULsePOSitionANGLe
SOURcePULSeWIDTh?
33,554,430 to 33,554,430
SOURRPULseVARType
SOURceRPULsePOSitionANGLe?
Usage
SOURceRPULseWIDThANGLe
SOURRPULseVARType?
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SOURceRPULseWIDThTIME
SOURceRPULseWIDThANGLe?
00000787 to
Usage SOURRPULSEWIDTTIME? @147
SOURceRPULseWIDThTIME?
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Specifications
General Specifications
Output Characteristics
Input Characteristics
1 mSec to 1 Second, resolution
Resolution Hz
Totalizer
Frequency Measurement
Rotational Velocity Measure
Pulse Width Measure
Frequency Source
Pulse Source
Characteristics
Rotational Pulse Source
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Extra Tooth Wheel