Mitsubishi Electric FX3G SERIES Programming Manual page 223

Programmable controllers

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Table of Contents

Series Programmable Controllers

Programming Manual - Basic & Applied Instruction Edition

1. Relationship between the label input position and the list program

The figure below shows programming of a label.

When creating a circuit program, move the cursor to the left side of the bus line in the ladder diagram, and input a label

(P) at the head of the circuit block.

2. Programming a label in a smaller number step than CJ instruction

A label can be programmed in a smaller number step than CJ instruction. However, note that a watchdog timer error

occurs when the scan time exceeds 200 ms (default setting).

3. Jumping to one label from two or more CJ instructions

When the pointer number in operands is same and there is one label, the following operation is caused:

When X020 turns ON, the program execution jumps from CJ instruction corresponding to X020 to the label P9. When

X020 turns OFF and X021 turns ON, the program execution jumps from CJ instruction corresponding to X021 to the

4. Using a label (P) two or more times

When a label number (including labels for CALL instructions described later) is used two or more times, an error is

User program

8 Program Flow – FNC 00 to FNC 09

8.1 FNC 00 – CJ / Conditional Jump

Fx3u series Fx3uc series