Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 221)

Chapter 7
Programming Parameters
7-55
Parameter 688 – Tach Switch Tolerance [TACH SWITCH TOL]
Internal units : 4096 = base motor speed
Programming Terminal units: RPM
Minimum Value: 0
Maximum Value: base speed
Default Value: 10% base speed
Function: Tach Loss Recovery
Description: (5.01 firmware only) This parameter establishes the
window for detection of tach loss when the Tach Loss Recovery
feature is selected. When the active feedback device (encoder or
tach) deviates from the Armature Voltage derived feedback for more
than 40 msec, then a Tach Switchover will occur.
NOTE: This parameter is NOT used with 6.01 and later revision
firmware. The combination of Parameter 731 and Parameter 732 took
over this function.
Parameter 689 – Tach Switch Ki [TACH SWITCH KI]
Internal units : None
Programming Terminal units: None
Minimum Value: 0
Maximum Value: 65535
Default Value: 50
Function: Tach Loss Recovery
Description: This parameter establishes the Ki gain that will be used
in the Velocity Regulator, following an automatic Tach Switchover to
Armature Voltage Feedback.
Parameter 690 – Tach Switch Kp [TACH SWITCH KP]
Internal units : None
Programming Terminal units: None
Minimum Value: 0
Maximum Value: 65535
Default Value: 10
Function: Tach Loss Recovery
Description: This parameter establishes the Kp gain that will be used
in the Velocity Regulator, following an automatic Tach Switchover to
Armature Voltage Feedback.
Only Available in
Firmware Version 5.01
Available in Version 5.01
and Later Firmware
Available in Version 5.01
and Later Firmware