Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 133)

1 Publication 1746-UM002B-EN-P - August 2004
Glossary
The following terms and abbreviations are used throughout this
manual. For definitions of terms not listed here refer to Allen-Bradley’s
Industrial Automation Glossary, Publication AG-7.1.
class
The class of the module (Class 1 or Class 4) determines: (1) its
compatibility with various processors; (2) the number of I/O words;
(3) its interrupt ability; and (4) the limits for the count and rate values.
debug mode
A mode of operation that allows the user to view the current
configuration settings in the input data file instead of showing counts
or rates.
dynamic parameter
A configuration parameter that can be altered while the counter is
running.
gate/preset mode
The gate/preset mode determines what, if any gating is applied to the
counter and what conditions, if any, preset the counter to the preset
value.
input configuration
Input configuration determine how the A and B inputs cause the
counter to increment or decrement.
operating mode
The operating mode determines the number of available counters and
which inputs are attached to them.
overflow (counter)
The module’s status when the maximum count would be exceeded.
overflow (rate)
The module’s status when the maximum rate is exceeded.
rate period
The interval, in time or in counts, during which pulses are counted.