Rockwell Automation Publication 750-RM100A-EN-P - August 2019 63
Chapter 8
Emergency Override Function
This section provides a description of the Emergency Override function and
configuration instructions for PowerFlex® 755T products.
Overview
The purpose of the function is to allow the drive or bus supply to override its
internal protections (faults) in emergency situations. This function is important
for applications where customers would trade product longevity for continued
running during an emergency situation.
Configuration
There are two modes for the function: Only Override and Purge Frequency.
The following parameters are used to configure the Emergency Override
function.
• 0:454 [Emerg OVRD Mode]
• 0:455 [Emerg Prot OVRD]
• 0:456 [EmergMode Status]
• 0:457 [Purge Frequency]
See PowerFlex Drives with TotalFORCE® Control Programming Manual,
publication 750-PM100
, for full descriptions of these parameters.
ATTENTION: The emergency override function allows you to configure the
drive to bypass internal protections when operating in emergency override
mode. When the emergency override mode is enabled and active,
protections that are selected are bypassed. Do not use the emergency
override function without considering applicable local, national, and
international codes, standards, regulations, or industry guidelines.
IMPORTANT The emergency override of protections and faults can reduce the life of the
product (drive or bus supply). Their purpose is to help protect the product
from conditions that can damage the product.
The person or company that configures the override assumes responsibility
for the damage to the product from the conditions that would otherwise
have triggered the protections.
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