Or, Or Inverse - Mitsubishi FX1S Series Programming Manual

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FX Series Programmable Controllers

Or, Or Inverse

(OR Inverse)

Program example:

Basic points to remember:

- Use the OR and ORI instructions for parallel connection of contacts. To connect a block

that contains more than one contact connected in series to another circuit block in

parallel, use an ORB instruction.

- Connect one side of the OR/ORI instruction to the left hand bus bar.

Peripheral limitations:

• The PLC has no limit to the number of contacts connected in series or in parallel.

However, some programming panels, screens and printers will not be able to display

or print the program if it exceeds the limit of the hardware. It is preferable for each

line or rung of ladder program to contain up to a maximum of 10 contacts and 1 coil.

Also keep number of follow-on outputs to a maximum of 24.

connection of NO

(normally open)

connection of NC

(normally closed)

X, Y, M, S, T, C

Basic Program Instructions 2

Program steps

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Fx1n series Fx2nc series Fx2n series