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Chapter 3 Paramters/Functions Innovation Series Medium Voltage GP Type - G Drives GEH-6385
Sequencer Functions

Sequencer Overview

Sequencing is a key function of the Innovation Series drive. The sequencer oversees
the starting and stopp ing of the drive. It keeps the drive fr om mis-operating during
fault or diagnostic conditions. The sequencer also provides drive status information
that can be used by various dr ive and application functi ons.
The Innovation Series drive sequencer can be described by the following functions:
• Fault Reset Logic
• Sequencer Permissives
• Stopping Commands and Modes
• Sequencer Commands
• Sequencer Status
• Main Contactor Configuration
Related diagrams
• Sequencing Overview (Ovr_Seq)

Fault Reset Logic

The sequencer oversees the shutdown of a drive under a fault condition. It makes
sure the contactor (if present) is open ed and that the r egulators and speed refer ences
are disabled in a timel y manner.
Faults can be reset in several different ways. They can be reset from the Drive
Diagnostic Interfa ce (DDI), also called the keypad. They can be reset by a selected
variable or through the LAN (if enabled).
Function inputs
Parameter Description
Fault reset select Specifies a Boolean variable that requests a fault reset,
when the variable transitions from a 0 to a 1 (Positive edge
detected).
Variable Description
Fault reset req, lan Requests a fault reset when the LAN is active and variable
transitio ns from a 0 to a 1 (posi tive edge detect ed). Refer
to LAN Signal Map. This variable m ust be selected in Fault
reset select to be active.
DDI “Reset Faults”
Push Button
Requests a fault reset when pressed.