Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 32)

Publication 1746-UM002B-EN-P - August 2004
2-12 Module Operation
Range Control The module can be programmed to use either counter or rate ranges
to determine whether an output is active. Up to 16 dynamically
configurable ranges are available. The ranges, programmed using
range start and range stop values, can overlap. When the count is
within more than one range, the output patterns of those ranges are
combined (logically ORed) to determine the actual status of the
output. A mixture of count ranges and rate ranges may be used.
Count Range
In a count range, the outputs are active if the count value is within the
user-defined range. The valid count range is dependent upon the
operating class. In Class 1, the valid range is -32,767 to +32,767. In
Class 4, the valid range is -8,388,607 to +8,388,607. The examples in
Figure 2.7 and Figure 2.8 use Class 1 operation.
Figure 2.7 Count Range with Linear Counter
0
-32,767 +32,767
on
off
Output 0
Output 1
Output 2
Output 3
Range 1
Range 3
Range 2 Range 4 Start
Value
Range 4 Stop
Value
Range Start
Value
Stop
Value
Outputs (1) Outputs
Affected
7 6 5 4 3 2 1 0
1 -7000 -5000 0 0 0 0 0 0 0 1 0
2 -1000 +4500 0 0 0 0 0 0 1 0 1
3 -4000 +3000 0 0 0 0 0 1 0 0 2
4 +9000 -9000 0 0 0 0 1 0 0 1 0 and 3
(1) Bits 0 through 3 are real outputs. Bits 4 through 7 are virtual outputs.