Rockwell Automation 1395 DC Drive, 800-1250 Hp, FRN 5.XX-9.30 - Manual (Page 146)

Chapter 5
Programming Parameters
5-55
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: 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.
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.