Hardware reference guide

Intelligent/Special Purpose
35013379 02 October 2007 361
Users are cautioned that beginning with V2.00 modules, if a quadrature type
encoder is used to provide count input and Pulse/Quadrature Input Counter 1 and
2, bits 9 or 10, are set to 1, the module will detect all edges. The result is four times
the rate sample value as would be accumulated with an equivalent pulse encoder
input. In the example in the above paragraph, the rate sample would be equal to
240.
Encoder type selection is set using Command 1, CONFIGURE (01XX), 4X+1
register, bits 9 or 10 (see the description of Command 1 in this section).
If the Encoder Type select bits are set to 0, either type of encoder will produce the
Rate Sample, as did versions of the module that were lower than V02.00.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com