V350 turning on all inputs when one input is firec

[cubcrazy]

I have V350 problem. When viewing the watch window input status, if input 0 is turned on, all inputs turn on. Is this a problem others have seen?

Edited November 1, 2022 by cubcrazy
Tilted change

[kratmel]

Please post V350 model #. Is it plc new or used?

Please read manual and check jampers inside PLC. 

[Joe Tauser]

2 hours ago, kratmel said:

Please read manual and check jumpers inside PLC. 

Do this first.

It's probably got something to do with whether you have the inputs set to sinking or sourcing and what you're applying to Input 0.  Are you applying +24V or a contact closure as referenced to 0V?

Joe T.

[cubcrazy]

8 hours ago, kratmel said:

Please post V350 model #. Is it plc new or used?

Please read manual and check jampers inside PLC. 

Model # V350-35-TR20 . The unit was purchased new.

[cubcrazy]

6 hours ago, Joe Tauser said:

Do this first.

It's probably got something to do with whether you have the inputs set to sinking or sourcing and what you're applying to Input 0.  Are you applying +24V or a contact closure as referenced to 0V?

Joe T.

I'm monitoring a mechanical pressure switch, when the switch closes it applies+24 Vdc to input 0. Some manufactures look at this as sourcing the input, others view it as sinking. 

[kratmel]

Please post your input diagram connection

[Flex727]

Here is the relevant section from the installation guide:

[cubcrazy]

53 minutes ago, Flex727 said:

Here is the relevant section from the installation guide:

Jumper 1 is in position (B) pnp sourcing and input is wired as shown for pnp input wiring. 

[sgull]

Is the 24v from the pressure switch from same 24v source as the supply to the PLC?

 

[Ausman]

Do you have + and - 24 wired correctly to 1 & 2 as well?