Rockwell Automation 20B PowerFlex 700 AC Drives Vector Control (v4.001 and up) - Manual (Page 112)

112 Rockwell Automation Publication 20B-UM002G-EN-P - July 2014
Appendix C Application Notes
TorqProve functionality with an encoder includes:
• Torque Proving (includes flux up and last torque measurement)
• Brake Proving
• Brake Slip (feature slowly lowers load if brake slips/fails)
• Float Capability (ability to hold full torque at zero speed)
• Micro-Positioning
• Fast Stop
• Speed Deviation Fault, Output Phase Loss Fault, Encoder Loss Fault.
Encoderless TorqProve functionality includes:
• Torque Proving (includes flux up and last torque measurement)
• Brake Proving
• Micro-Positioning
• Fast Stop
• Speed Deviation Fault, Output Phase Loss Fault.
IMPORTANT Brake Slip detection and Float capability (ability to hold load at zero speed) are
not available in encoderless TorqProve.
ATTENTION: Loss of control in suspended load applications can cause personal
injury and/or equipment damage. Loads must always be controlled by the drive
or a mechanical brake. Parameters 600-612 are designed for lifting/torque
proving applications. It is the responsibility of the engineer and/or end user to
configure drive parameters, test any lifting functionality and meet safety
requirements in accordance with all applicable codes and standards.
ATTENTION: User must read the following prior to the use of TorqProve with no
encoder.
Encoderless TorqProve must be limited to lifting applications where personal safety
is not a concern. Encoders offer additional protection and must be used where
personal safety is a concern. Encoderless TorqProve cannot hold a load at zero
speed without a mechanical brake and does not offer additional protection if the
brake slips/fails. Loss of control in suspended load applications can cause personal
injury and/or equipment damage.
It is the responsibility of the engineer and/or user to configure drive parameters,
test any lifting functionality and meet safety requirements in accordance with all
applicable codes and standards. If encoderless TorqProve is desired, the user must
certify the safety of the application. To acknowledge that the end user has read this
“Attention” and properly certified their encoderless application, bit 8
(“TPEncdless”) of [Compensation], parameter 56 must be changed to a “1.” This
will disable Fault 28, “See Manual” and allow bit 1 of Parameter 600 to be changed
to a “1” enabling encoderless TorqProve.