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368

/FX

3UC

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

13 High Speed Processing – FNC 50 to FNC 59

13.7 FNC 56 – SPD / Speed Detection

13.7

FNC 56 – SPD / Speed Detection

Outline

This instruction counts the input pulse for a specified period of time as interrupt input.
The function of this instruction varies depending on the version.

1. Instruction format

2. Set data

3. Applicable devices

S1: X000 to X007 can be specified.
S2: This function is supported only in FX

/FX

3UC

PLCs.

Operand Type

Description

Data Type

Device number of pulse input (X)

Bit

Time data (ms) or word device number storing the data

16- or 32-bit binary

Head word device number storing the pulse density data

16- or 32-bit binary

Oper-

and

Type

Bit Devices

Word Devices

Others

System User

Digit Specification

System User

Special

Unit

Index

Constant

Real

Number

Charac-

ter String

Pointer

M T C S D.b KnX KnY KnM KnS T C D R U\G V Z Modify

3 3 3 3

3 3

3 3 3 3

3 3

Mnemonic

Operation Condition

32-bit Instruction

13 steps DSPD

Continuous

Operation

7 steps SPD

Continuous

Operation

16-bit Instruction

Mnemonic

Operation Condition

FNC 56

SPD