Rockwell Automation 1746-HSRV SLC Servo Control Module User Manual - Manual (Page 180)

Publication 1746-6.1.2 - July 2000
Input/Output Quick Reference A-7
Output Voltage at +
Max Speed – Volts
(Servo Loop) M0:s.24,s.25 0.0 to 10.0 10.0 This parameter has a default value of (+10.0V). This
default uses the full range of the control’s DAC (2048
counts).
If you specify a value that is less than the default
value, the control scales the number of DAC counts
in use accordingly.
For example, if you enter +2.5V as the value for this
parameter, only 512 counts of the DAC are in use for
commanding speed. As a result, the speed resolution
for the SLC Servo Module is reduced by a factor of 4.
You set up this parameter at axis integration time.
Refer to the
Setting Up Your SLC Servo Module chapter
for more information .
Output Voltage at -
Max Speed – Volts
(Servo Loop) M0:s.26,s.27 –10.0 to 0.0 –10.0 This parameter has a default value of (–10.0V). This
default uses the full range of the control’s DAC (2048
counts).
If you specify a value that is less than the default
value, the control scales the number of DAC counts
in use accordingly.
For example, if you enter –2.5V as the value for this
parameter, only 512 counts of the DAC are in use for
commanding speed. As a result, the speed resolution
for the SLC Servo Module is reduced by a factor of 4.
You set up this parameter at axis integration time.
Refer to the
Setting Up Your SLC Servo Module chapter
for more information .
Maximum Axis Speed
– Position Units/Time
(Motion) M0:s.28,s.29 0.0 to +physical limit 3000.0 This parameter requires the use of Encoder Lines
and Counts per Position Unit parameters described
in the
Feedback Parameters section of thismanual and
the rated motor speed. Use this formula to calculate
the value for the Maximum Axis Speed Parameter:
Maximum Axis Speed in Position Units/Minute
= (Motor Rated Speed rpm x 4 x Encoder Lines) /
(Counts/Position Unit)
The value computed is the absolute maximum speed.
Maximum Axis Speed in Position Units/Second
= (Maximum Axis Speed in Position Units/Minute /
60.0)
Time to Maximum
Axis Speed – seconds
(Motion) M0:s.30,s.31 0.0 to +physical limit 1.0 This parameter specifies how fast an axis
accelerates/decelerates to the maximum/minimum
axis speed. Select this parameter carefully as axes
with large load inertia do not accelerate at the same
rate as a motor/drive system at no load. High
acceleration/deceleration can cause the axis to
vibrate and damage to the axis can occur.
Parameter Name
(Parameter Group) Destination M
File Location
1
Range Default Additional Information