Mitsubishi Electric FX3G SERIES Programming Manual page 560

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

Explanation of function and operation

Caution on writing during RUN

During RUN, avoid writing while PLSV (FNC157) instruction is executed (that is, while pulses are output).

Note that if writing is executed during RUN to a circuit block including FNC157 instruction while pulses are output, the

PLC executes the operation shown below.

During operation with acceleration/deceleration

During operation without acceleration/deceleration

Only available for FX

Function change depending on the version

The function of the FNC157 instruction is changed depending on the version as shown in the table below.

Applicable version

PLC Ver.2.20 or later and FX

→ For explanation of the instruction and the contents of function change,

Acceleration/

deceleration operation

20 Positioning Control – FNC150 to FNC159

20.6 FNC157 – PLSV / Variable Speed Pulse Output

PLC operation when writing is excuted during RUN while instruction is

Decelerates and stops pulse output.

Immediately stops pulse output.

refer to the Positioning Control Edition.

Outline of function

When M8338 is set to ON, the PLC accelerates or decelerates up to

in the acceleration or deceleration time corresponding to

Fx3u series Fx3uc series