Motor Overload Retention - Allen-Bradley Kinetix 5700 User Manual

Motor Overload Retention

The motor overload retention feature protects the motor in the event of a drive
power-cycle, in which the motor thermal state is lost.
With motor overload retention, upon drive power-up the MotorCapacity
attribute initially reads:
• 20% if the motor is configured to use an integral thermal switch or an
integral motor winding temperature is available
• 50% if the motor is not configured to use an integral thermal switch or
an integral motor winding temperature is not available
If you have a separate monitoring algorithm within your Logix 5000 controller,
you can use the InitialMotorCapacity attribute (3075)
the initial MotorCapacity value that the motor overload retention feature
populates.
• You can write to the InitialMotorCapacity attribute only in the Stopped
state after power-up
• You cannot write to the InitialMotorCapacity attribute after the first
time the axis is enabled following a power cycle.
Use a message instruction to write to the InitialMotorCapacity value.
In this example, the source element tag motorcapacity is a REAL Data type.
Rockwell Automation Publication 2198-UM002G-EN-P - February 2019
Motor Control Feature Support Appendix E
or (C03) to change
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