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156
Pulse Inputs Section 7-5
■ Range Comparison Method
Up to 16 comparison ranges (lower and upper limit values) and corresponding
output bit patterns can be registered in the comparison table. When the PV of
the counter first is within the upper and lower limits of one of the ranges for
CTBL(882) execution, the corresponding bit pattern (1 to 16) will be output to
A613 or A615.
Target value
0
Counter PV
: Interrupt
Elapsed time
(seconds)
Target values
for comparison
Target value
Target value
Target value
Target value
Target value
3
2
4
1
5
1 2 3 4 5 1
1
2
3
4
5
Target value
Target value
Target value
Target value
Comparison table
Comparison range
Comparison range
Comparison range
0
Comparison range
Counter PV
Elapsed time
(seconds)
The PV is compared to all comparison ranges
at each instruction execution.
Range
Range
Range
Range
4
3
1
2
4
3
2
1
Comparison table
High-speed counter PV
Range (1)
Range (2)
Range (16)
Bit pattern (1)
Bit pattern (2)
Bit pattern (16)
0
15
A613 or A615
Internal bit pattern
Comparison
Bit pattern output when
PV is within range.
15 0