Rockwell Automation 23P PowerFlex Digital DC Drive - Manual (Page 289)

Rockwell Automation Publication 20P-UM001K-EN-P - July 2014 289
Application Notes Appendix C
Lifting/Torque Proving TorqProve™ technology for PowerFlex DC drives is intended for applications
where proper coordination between motor control and a mechanical brake is
required. Prior to releasing a mechanical brake, the drive will check motor
armature continuity and verify proper motor control (torque proving). The drive
will also verify that the mechanical brake has control of the load prior to releasing
drive control (brake proving). After the drive sets the brake, motor movement is
monitored to verify the brake’s ability to hold the load.
TorqProve can be operated with an encoder or encoderless. See “Attention” on
page
290 prior to the use of TorqProve with no encoder.
TorqProve functionality with an encoder includes:
• Torque Proving (includes 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 and Encoder Loss Fault.
Encoderless TorqProve functionality includes:
• Torque Proving
• Micro-Positioning
• Fast Stop
• Speed Deviation Fault.
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 1100…1114 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.
IMPORTANT Brake Slip detection and Float capability (ability to hold load at zero speed) are
not available in encoderless TorqProve.