Rockwell Automation SP600 AC Drive User Manual Version 1.0 - Manual (Page 26)

2-12 SP600 AC Drive User Manual
2.4.14 Motor Overload Protection
The motor thermal overload function (enabled in parameter 238)
uses an inverse time (IT) algorithm to model the temperature of the
motor. This curve is modeled after a Class 10 protection thermal
overload relay that produces a theoretical trip at 600% motor current
in 10 seconds and continuously operates at full motor current.
The following parameters are used to set the overload feature:
• Motor NP LFA (42)
• OL Factor (48)
• Motor OL Hertz (47)
• Fault Config 1 (238)
Refer to parameter 42 in chapter 12 for more information about this
feature.
2.4.15 Shear Pin Fault
This feature allows you to program the drive to fault if the drive
output current exceeds the programmed current limit (see
parameter 238). As a default, exceeding the set current limit is not a
fault condition. However, if you want to stop the process in the event
of excess current, the Shear Pin feature can be activated. By
programming the drive current limit value and enabling the
electronic shear pin, the drive will fault if excess current is
demanded by the motor.
2.4.16 Drive Peripheral Interface (DPI)
SP600 drives support Drive Peripheral Interface (DPI)
communication protocols for the primary interface and drive control.
DPI is an enhanced serial communications protocol that provides
high functionality and high performance.
The serial DPI connection is used for devices such as Operator
Interface Modules (OIMs), PC interface tool (VS Utilities), and
network communications modules.
2.4.17 Network Data Transfer via Datalinks
A Datalink (see parameters 300 to 317) is one of the mechanisms
used by SP600 drives to transfer data to and from a programmable
controller via the optional network communications modules
(DeviceNet or ControlNet). In the case of ControlNet, Datalinks
allow a parameter value to be changed without using an Explicit
Message or Block Transfer.