The local reference is active when the drive is operated with 'Hand On' bottom active. Adjust the reference by up/down and left/right arrows respectively.

Remote Reference

The reference handling system for calculating the Remote reference is shown in the illustration below.

The Remote Reference is calculated once every scan interval and initially consists of two types of reference inputs:

X (the external reference) : A sum (see par. F-54 Reference Function) of up to four externally selected references, comprising any combination (determined

by the setting of par. F-01 Frequency Setting 1, par. C-30 Frequency Command 2 and par. C-34 Frequency Command 3) of a fixed preset reference

(par. C-05 Multi-step Frequency 1 - 8 ), variable analog references, variable digital pulse references, and various serial bus references in whatever unit

the frequency converter is controlled ([Hz], [RPM], [Nm] etc.).

Y- (the relative reference): A sum of one fixed preset reference (par. F-64 Preset Relative Reference) and one variable analog reference (par. F-68 Relative

Scaling Reference Resource) in [%].

The two types of reference inputs are combined in the following formula: Remote reference = X + X * Y / 100%. If relative reference is not used par. F-68 must be

set to No function and par. F-64 to 0%. The catch up / slow down function and the freeze reference function can both be activated by digital inputs on the

frequency converter. The functions and parameters are described in the Programming Guide, DET-618

The scaling of analog references are described in par. groups AN-1# and AN-2#, and the scaling of digital pulse references are described in par. group E-6#.

Reference limits and ranges are set in par. group F-5#.

AF-650 GP Design Guide

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