Contents
ENHANCED FREQUENCY/TOTALIZE/ PWM SIGNAL CONDITIONING PLUG-ON
82-0093-000 Release April 28 VXI Technology, Inc 2031 Main Street
Irvine, CA 949
VT1538A
VXI Technology, Inc
Dynamic DAC Products
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Agilent Technologies E1538A Enhanced Frequency/Totalize/PWM
User’s and SCPI Programming Manual
Signal Conditioning Plug-on
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
8 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 Channels
Configuring I/O Direction
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
Figure 21. Variable Position, Width Preset by Angle
Variable Angular Position, Preset Pulse Width by time
Example of variable position, preset width
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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
Figure 24. Fixed Position, Variable Width by Time
preset ch 46 pulse width to 10ms
preset ch 47 pulse width to 15ms
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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
40 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP
RST and *TST important
For newer
SCPI Command Reference
Command Syntax
Page
Discussed
Parameters
INPutPOLarity
INPutPOLarity?
Comments
INPutTHResholdLEVel
level can be set to a resolution of
INPutTHResholdLEVel?
Send with VXIplug&play Function hpe14XXcmdReal64Q
OUTPutPOLarity
OUTPutPOLarity?
generated
SENSeFREQuencyAPERture
RST Condition .001 sec Send with VXIplug&play Function hpe14XXcmd
SENSeFREQuencyAPERture?
Related Commands SENSFREQAPER
SENSeFREQuencyLIMitLOWer
INIT
SENSeFUNCtionCONDition
Related Commands INPutPOLarity
SENSeFREQuencyLIMitLOWer?
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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RST Condition is “APERture”
SENSePERiodLIMitUPPer?
SENSePERiodMODE
SENSePERiodMODE mode,@chlist selects the measurement
SENSePERiodNPERiods
Related Commands SENSePERiodMODE
SENSePERiodMODE?
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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Output Characteristics
Specifications
General Specifications
Input Characteristics
Totalizer
1 mSec to 1 Second, resolution
Resolution Hz
Frequency Measurement
Frequency Source
Rotational Velocity Measure
Pulse Width Measure
Pulse Source
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Characteristics
Rotational Pulse Source
Extra Tooth Wheel