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6.14 Writing in Program during CPU Module RUN

6.14.1 Online change in ladder mode

FUNCTIONS

6.14 Writing in Program during CPU Module RUN

With the CPU module, writing during RUN is possible in ladder mode.

6.14.1 Online change in ladder mode

(1) Writing data in the circuit mode during RUN Status

Writing data in the circuit mode during RUN is a function to write a program during the

CPU module RUN status.

Writing data in the circuit mode during RUN can be executed only at TEST MODE.

The program can be changed without stopping the process in CPU module program

by performing writing data in the circuit mode during RUN status.

(2) Precautions

Take a note of the following when online change is performed:

(a) Memory enabled for online change

The memory that can be written during RUN is only program memory.

(b) Online change performed during boot run

When writing during RUN is executed, the boot source program is not changed.

Write the contents of program memory to standard ROM before the PLC power-off

or the CPU module reset after writing during RUN.

A maximum of 512 steps can be written at once during RUN.

Diagram 6.26 Outline of online change in ladder mode

Change by GX Developer and write in

CPU module at the conversion

X100

Y100

X104

X102

X106

SET M10

X104

X108

END

GX Developer

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