* For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192
30
Trim Pot
Introduction
This guideline will outline a G7 feature that allows a speed reference to be “fine tuned” on the fly via
another reference, called the “trim”. All trim sources mentioned below allow addition to the regular
reference; (+/-) trim is available only when using the RX terminal and its associated bias and gain
have been appropriately programmed. Speed References Allowed: Panel input, 4-20mA, speed pot
or voltage source, preset speed, or communication board. Trim Sources Allowed: Speed pot (RX
terminal, +/- trim possible, RR terminal, + trim only), 4-20mA (VI/II, + trim only), or panel (+ trim only).
Other trim sources can be found in Frequency Override Additive Input (F660). This example will
illustrate the connections and programming necessary to follow a 4-20mA speed reference while
trimming the reference with a (+/-) trim from a pot connected to the RX terminal.
Connections
TERMINAL STRIP
ST CC F CC
VI CC PP RX CC
4-20 mA Source Speed Pot
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