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High-speed Counter/Pulse Output Instructions Section 3-20
■ Reading the Results of Range Comparison (C = 0002 hex)
If C is 0002 hex, PRV(881) reads the results of range comparison and stores it
in D as shown in the following diagram.
■ Reading Pulse Output or High-speed Counter Frequency (C = 00
@3 hex)
If C is 00@3 hex, PRV(881) reads the frequency being output from pulse out-
put 0 to 3 or the frequency being input to high-speed counter 0 and stores it in
D and D+1.
Read Frequency Ranges
Pulse Frequency Calculation Methods
There are two ways to calculate the frequency of pulses output from pulse
output 0 to 3 or pulses input to high-speed counter 0.
1. Standard Calculation Method (Earlier Method)
015
D
000 0 0 0 0 0
Comparison Result 1
OFF: Not in range ON: In range
Comparison Result 2
OFF: Not in range ON: In range
Comparison Result 3
OFF: Not in range ON: In range
Comparison Result 4
OFF: Not in range ON: In range
Comparison Result 5
OFF: Not in range ON: In range
Comparison Result 6
OFF: Not in range ON: In range
Comparison Result 7
OFF: Not in range ON: In range
Comparison Result 8
OFF: Not in range ON: In range
Value of P CPU Unit type and unit version Pulse output/
Counter input
method
Conversion result
0000 to
0003 hex
CP1H X/XA CPU Unit, unit version 1.0 Pulse output 2 or 3 0000 0000 to 0000 7530 hex (0 to 30,000)
CP1H X/XA CPU Unit, unit version 1.1
or later
Pulse output 0 or 1 0000 0000 to 0001 86A0 hex (0 to 100,000)
Pulse output 2 or 3
CP1H Y CPU Unit, any unit version Pulse output 1 or 2 0000 0000 to 000F 4240 hex (0 to 1,000,000)
Pulse output 2 or 3 0000 0000 to 0001 86A0 hex (0 to 100,000)
CP1L CPU Unit, any unit version Pulse output 2 or 3 0000 0000 to 0001 86A0 hex (0 to 100,000)
0010 hex CP1H X/XA, or CP1L CPU Unit, any
version
Any counter input
method other than
4× differential
phase mode
0000 0000 to 0001 86A0 hex (0 to 100,000)
Note If a frequency higher than 100 kHz has
been input, the output will remain at the
maximum value of 0001 86A0 hex.
4× differential
phase mode
0000 0000 to 0003 0D40 hex (0 to 200,000)
Note If a frequency higher than 200 kHz has
been input, the output will remain at the
maximum value of 0003 0D40 hex.
CP1H Y CPU Unit, any version Any counter input
method other than
4× differential
phase mode
0000 0000 to 000F 4240 hex (0 to 1,000,000)
Note If a frequency higher than 1 MHz has
been input, the output will remain at the
maximum value of 000F 4240 hex.
4× differential
phase mode
0000 0000 to 001E 8480 hex (0 to 2,000,000)
Note If a frequency higher than 2 MHz has
been input, the output will remain at the
maximum value of 001E 8480 hex.
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