Rockwell Automation 8510 AC Spindle Drive System Programming Manual - Manual (Page 25)

Programming
Chapter 2
2-22
A/D Conv Type
This parameter determines which A/D converter will be used with the
servo mode analog input signal. The standard A/D converter is a 10 bit
converter with auto-ranging capabilities that gives an effective 14 to 17
bits resolution for positioning applications.
However, for large command changes, the autoranging function
introduces a time delay. The full input range of +10 volts to –10 volts is
broken into 32 equal steps of 0.625 volts. Within one increment, A/D
conversions are made in 0.8 ms. To shift the input level one increment
requires 0.8 ms. For a maximum input change from +10 volts to –10
volts, the maximum delay is 26.4 ms. The optional A/D converter is a full
14 bit, high speed converter providing an input sample every 0.8 ms. This
converter must be used for precision continuous path contouring
applications and very high response positioning applications.
Possible Choices: STANDARD, 14 BIT LINEAR
Default Value
STANDARD
ANALOG CAL
This menu allows selection of two alternative methods to calibrate the
analog input channel.
MEASURE INPUT
Allows selection of the steps required to calibrate the analog input by
actually measuring the value of the applied signal voltages. This is the
preferred method for calibrating the analog input.
Zero Volt In
This parameter requires the user to input the command voltage that is
equal to the zero speed command. When the Select key is pressed, the
control will read the input voltage on the input selected by the Analog
Input # parameter and use that as the zero speed reference value. The
display will function as a voltmeter to show the voltage being read on
the analog input.
Data Range: VOLT 00.000 to
±
09.999
Default Value 0.000
Max +Volt In
This parameter requires the user to input the positive command
voltage that is equal to the maximum speed command. When the
Select key is pressed, the control will read the input voltage on the
input selected by the Analog Input # parameter and use that as the
maximum speed command reference value. The display will function
as a voltmeter to show the voltage being read on the analog input.
Data Range: VOLT 00.000 to 10.000
Default Value 10.000