Yaskawa F7 Drive Enhanced PID With Digital Velocity Follower - Manual (Page 2)

Date: 08/08/05, Rev: 05-08 Page 2 of 17 TM.F7SW.058
This document is intended to provide proper installation and use of the Yaskawa drive with custom software. This
document is a supplement to the standard drive technical manual. It describes the effects on the drive parameters
and functions with the software installed. Read and understand this document and the standard drive technical
manuals before attempting to install, adjust, operate, inspect or maintain the drive. Observe all cautions and
warnings in this document and the standard drive technical manuals. Custom software is written to add
functionality to a standard AC drive to enhance or enable use in a specific application. The software is loaded to
the flash ROM area of the control board, and replaces the standard drive software. Custom software can add new
functions, modify standard functions, or even inhibit standard functions. It can be used to modify display text or
parameter names. Custom software is usually loaded to the drive before delivery. The control board and drive
nameplate are assigned unique part numbers and the software is registered, archived, and retrievable.
When seeking support for a drive with custom software, it is imperative to provide the unique part number shown
on the drive nameplate. The software has been flashed to the control board memory and the operation of
parameters, functions, and monitors are different than the standard drive software, as described herein.
1.0 Overview
The enhanced PID features are designed to expand the functionality and correct some deficiencies of the
drive’s standard PID algorithm. The enhanced PID function utilizes the parameters of the standard software
PID function (B5 group) as well as many new P group parameters. The digital velocity follower feature is
designed to allow quadrature encoder feedback to be used as a precision bi-directional frequency reference.
1.1 Simplified Block Diagram of Enhanced PID: 2 Input (B5-01 = 1 or 2)