Rockwell Automation 160 Series C Firmware - Manual (Page 3)

160 Series C Custom Firmware 3
Smartspin Balance Detection
Smartspin balance detection uses the current phase angle information
to determine if the load is within a programmable amount of
variation. The algorithm requires four parameters which allow for
individual machine set-up. In addition, a display parameter (P20 -
[Smartspin Angle]) will be used to aid in the set-up of this feature.
Important: New control logic has been added to all 2 wire control
schemes to support Smartspin. When the Balance
Detection Complete bit of [Smartspin Status] is set,
asserting both the Run Forward and Run Reverse inputs
will initiate Smartspin (the Smartspin Active bit of
[Smartspin Status] will be set).
At all other times, setting both Run Forward and Run
Reverse simultaneously will result in the drive stopping.
During Smartspin, [Smartspin Result] is used as the
frequency reference.
Once the Smartspin Active bit of [Smartspin Status] is set,
removing either Run Forward or Run Reverse will
terminate Smartspin and cause the drive to stop.
Table C
Smartspin Balance Detect Parameters
Param.
Number Parameter Name Min./Max./
Default
Description
P38 Smartspin Level 0/255/0
Numeric Value Sets the threshold of angle variation in the load. Below
this limit the balance detect output becomes active.
P49 PWM Frequency 2.0/6.0/4.0 PWM frequency.
P62 Smartspin Status 0/255/0 Status word:
Bit 0 – Balance Detection In Progress
Bit 1 – Balance Detection Complete
Bit 2 – Smartspin Active
Bits 3 through 7 – Not Used
P63 Smartspin Time 0/255/0 Sec Number of seconds before the output relay will
indicate the results of the balance test.
P64 Smartspin Frequency 0/240/0 Hz The target frequency at which the drive will perform
the balance test.
IMPORTANT: Once balance detection has started,
[Smartspin Frequency] is used as the frequency
reference. This minimizes drift problems associated
with using an analog frequency reference. There is a
3 Hz hysteresis band around this frequency which will
have to be exceeded in order to terminate balance
detection.
P65 Smartspin Result 0/240/0 Hz Frequency result determined by Smartspin.
P66 Smartspin Scale 0/999/221
Numeric Value Scale factor used to configure Smartspin.
P41 Smartspin Volts 0/230/0 Volts The voltage used when the commanded frequency
equals [Smartspin Frequency], and the output
frequency reaches the commanded frequency.
IMPORTANT: If [Smartspin Volts] = zero, the output
voltage will be determined by the selected volts/hz
curve.
P20 Smartspin Angle 0/255/0
Numeric Value Difference measured by the drive, and used to
compare with P38 - [Smartspin Level].
Shading indicates recent firmware changes