Hardware reference guide

Intelligent/Special Purpose
35013379 02 October 2007 377
Controlling the
Module
Hardware inputs from the field can be used to:
z Increment/decrement the input counters with serial pulses from encoders or other
square wave sources.
z Set direction of count.
z Reset the outputs.
Hardware inputs from the field and software commands are used together to:
z Enable the count input.
Hardware inputs from the field or software commands can be used to:
z Preset the input counter to zero or maximum count.
Software commands can be used to:
z Configure the counters for pulse (tachometer) or quadrature mode.
z Configure for 16 or 32 bit counters, with or without output assertion.
z Configure the module to operate in either count or rate-sample mode.
z Option for outputs to operate or not operate if backplane bus communication is
lost (i.e., a fault condition).
z Option for outputs to switch on when setpoint and/or maximum values are
reached.
z Define the setpoint and maximum count values.
z Define ON time for outputs.
z Disable outputs.
z Read the input counter totalizing or rate sample values.
z Retrieve the old (previous) input counter value after the counter has been preset.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com