Rockwell Automation 8520 9/Series Hardware TAB 5 - Manual (Page 16)

Section 5A
9/440 Resolver–based CNC/Drive System
5A-14
Maximum Axis Speeds
Axis feedback resolution (for 1326 motor resolvers) is selected in AMP to
be either 8192 counts/rev or 32768 counts/rev. The maximum motor RPM
when set for 8192 counts/rev is 6000 RPM. The maximum motor RPM
when set for 32768 counts/rev is 3000 RPM. Actual final axis speed is
based on gearing and lead screw pitch. Exceeding this motor speed can
result in feedback overflow on the 9/440 resolver–based feedback board
and a feedback or maximum speed error will be generated. The encoder
ports do not have this same restriction.
The 1326 motors are equipped with resolvers used to generate velocity
feedback and provide motor commutation. These resolvers can also be
used as positioning devices for the axis. Resolver feedback is converted
into A quad B encoder type feedback on the 9/440 resolver–based
feedback board before being transferred to the 9/440 resolver–based
processor. Resolution of the resolvers is selectable through ODS as either
32768 counts or 8192 counts per revolution.
Resolver feedback is wired directly from the motor mounted resolver to the
9/440 resolver–based feedback board found in the system module. This
cable can be purchased directly from Allen-Bradley (cat. no. 1326-CCUx).
5A.3.1
Connecting Resolver
Feedback