Mitsubishi Electric FX3G SERIES Programming Manual page 444

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

1. Setting of the parameter "n"

Refer to the explanation of parameter setting in the SEGL (FNC 74) instruction. The setting range is from 0 to 3 for the

ARWS instruction.

2. Output type of the PLC

Use a transistor output type PLC.

3. Scan time (operation cycle) and the display timing

ARWS instruction is executed in synchronization with the scan time (operation cycle) of the PLC.

For achieving a series of display, the scan time of the PLC should be 10 ms or more.

If the scan time is less than 10 ms, use the constant scan mode so that the scan time exceeds 10 ms.

4. Number of occupied devices

Four input devices are occupied starting from

Eight output devices are occupied starting from

5. Limitation in the number of the instruction

ARWS instruction can only be used once in a program.

When ARWS instruction should be used two or more times, use the indexing (V, Z) function.

Program example

1. When changing the timer number and displaying the current value

Specifying the timer number using a 3-digit digital switch

Setting the constant of the timer using the arrow switches

Y007 Y006 Y005

X004 X003 X002 X000

Explanation of operation

Every time the read/write key is pressed, the read/write LED lights alternately.

• In reading

Set the timer number using the digital switch, and then press the set switch (X003).

• In writing

Set a numeric value using the arrow switches while looking at the seven-segment display unit, and then press the

switch X003.

15 External FX I/O Device – FNC 70 to FNC 79

→ For the parameter setting, refer to Subsection 15.5.2.

15.6 FNC 75 – ARWS / Arrow Switch

Fx3u series Fx3uc series