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COUNTER FREQUENCY CONVERT: PRV2(883) Section 5-3
5-3 COUNTER FREQUENCY CONVERT: PRV2(883)
Purpose PRV2(883) reads the pulse frequency input from a high-speed counter and
either converts the frequency to a rotational speed or converts the counter PV
to the total number of revolutions. The result is output to the destination words
as 8-digit hexadecimal. Pulses can be input from high-speed counter 0 only.
This instruction is supported by the CJ1M CPU Units Ver. 2.0 or later only.
Ladder Symbol
Variations
Applicable Program Areas
Operands C1: Control Data 1
C2: Control Data 2 (Pulses/revolution)
Specifies the number of pulses per revolution (0001 to FFFF hex).
D: First Destination Word
The PV is output to D or to D and D+1.
Operand Specifications
PRV2(883)
C1
C2
D
C1: Control data
C2: Pulses/revolution
D: First destination word
Variations Executed Each Cycle for ON Condition PRV2(883)
Executed Once for Upward Differentiation @PRV2(883)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
C1
0
Conversion Type
0 hex: Frequency to speed
1 hex: Counter PV to total revolutions
(When Conversion Type is "Frequency to speed")
Pulse Frequency Calculation Method
0 hex: Standard calculation method
1 hex: High-frequency calculation method, 10-ms sampling (See note.)
2 hex: High-frequency calculation method, 100-ms sampling (See note.)
3 hex: High-frequency calculation method, 1,000-ms sampling (See note.)
(When Conversion Type is "Frequency to speed")
Speed Unit
0 hex: r/min
1 hex: r/s (See note.)
2 hex: r/h (See note.)
D
D+1
0
15
Lower word of conversion result
Upper word of conversion result
Area C1 C2 D
CIO Area --- CIO 0000 to
CIO 6143
CIO 0000 to
CIO 6142
Work Area --- W000 to W511 W000 to W510
Holding Bit Area --- H000 to H511 H000 to H510
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