Bringing the Benefits of Real-Time Data Collection to the World
Sutron Corporation, Tel: 703-406-2800,
http://www.sutron.com
275
G 1
*
G 2 G 3 G 4 G 5
G
6
G
7 # G
8
*#
G
SW
BAT
G = Ground
* = Input Only
# = Switchable sensitivity
Inputs
When programmed as an input, each line can act as a digitally filtered counter clock or a shaft
encoder input. Shaft encoders require two input lines, hence, users can have up to four shaft
encoders, eight counters, or a combination of the two. When a run command is received,
sampling of the inputs starts.
Digital filters
The inputs can be low pass filtered before being applied to counters. Shaft encoders are not
filtered. The digital filters are up-down counters that count between 0 and a user defined
threshold value. Each input line’s filter can have a different threshold value. The input to a filter
is one of the eight input lines, the output feeds a 32-bit counter. The filter counts up at each
sample interval when its input is a one and down when its input is a zero. The counter will not
count up if it is at its upper threshold, and it won’t count down when its count is zero. The output
of the of the filter only changes state when the counter reaches zero or its upper threshold. Thus,
if the output state of the filter is a one, it will stay a one until the counter reaches zero. It will
then remain zero until the counter counts up to its upper threshold. Valid digital filter time
constants are 1 to 255.
Counters
Up to eight 32-bit counters can be programmed to count on both edges or just the positive-going
edge of their respective inputs. Since the input to the counter can be inverted under program
control, the counter can also be made to count on the negative going edge by inverting its input.
The counter alarm message can be set to be sent after 1 to 255 counts.
Frequency
The time is logged for each counter every time it counts. This time is reported for each counter
when the counters are read. Frequency can be measured by reading the counters twice and
computing the difference in time and counts.
Shaft encoders
Up to four quadrature shaft encoders may be set up. The input lines must come from adjacent
inputs starting with an odd numbered one (e.g.: 1,2; 3,4; 5,6; 7,8). Each shaft encoder has a 32-
bit counter associated with it. It counts up for one direction of rotation and down for the other.
Summary of Contents for Xpert2
Page 2: ......
Page 11: ...Chapter 1 Introduction...
Page 16: ......
Page 17: ...Chapter 2 Getting Started...
Page 86: ......
Page 87: ...Chapter 4 Graphical Setup Diagrams...
Page 104: ......
Page 105: ...CHAPTER 5 EXAMPLE SETUPS...
Page 128: ......
Page 129: ......
Page 130: ......
Page 131: ...Chapter 7 Installation...
Page 140: ......
Page 141: ...Chapter 8 Maintenance and Troubleshooting...
Page 145: ...Appendix A Setup Blocks...
Page 266: ......
Page 267: ...Appendix B Updating the Firmware...
Page 290: ......
Page 291: ...Appendix E Software Development Kit SDK...
Page 293: ...Appendix F Creating Custom Voice Files...
Page 330: ......