Can't activate a coil in more than 1 place

[Automation_Guy]

I'm a newbie to PLC's, so I apologize if this question seems overly simple. I am using Machine Expert - Basic to control a Schneider M221 PLC.  I want to turn on a Pilot Light from multiple places in my program.  However, when I add more than 1 reference to the pilot light output, it only activates on the last rung of a ladder. The attached image shows a very basic version of what I'm trying to do. When I activate M0, the output coil turns on. However, when I activate M1, the output coil does not turn on. Can anybody explain to me why this happens? Thank you!

[Bastian_Schmitz]

Hello,

A PLC works normally always sequencial. And any Output should only be used one time. Because like you noticed otherwise always the last command win. In your case you need to define a logic (AND/OR/ AND+OR) in which case the output should be switched. After this logic you can write once the output.

best regards

[Achzarkasyi]

Saya mengalami hal yang sama. Bagimana cara agar kami bisa menggunakan output yang sama dalam 1 waktu tolong bantu kami

[Marian_Pavlik]

Direct coil %M10 can be used once only. If is used twice, only the last result will be taken in account at end of program cycle. Use another memory bit and connect them in parallel.