FOUNDATION Fieldbus

[Johnnykoo]

Hello, I have a simple question, 

on the configurator window, @ set tag command, 

there is an option as "set to OOS mode" 

1st, what is the difference between check on "set to OOS mode" or not ? 

I've done both ways and do not see the difference.. 

2nd, I'm confused how the FF network use device  ID , address and PD_TAG

here is my understanding

device id is just for the uniqe id like a serial number for the device

address is used to be identified in the network 

PD_TAG, device tag is just a name of the device visualized in the user interface or program in the network 

so that users know what it is

so according to my understanding, set tag will not, should not affect the network / functioning 

because tag is not used in the network data communication ? Therefore, I do not understand why

the "set to OOS mode" check box is necessary,,, I think it's meaningless 

please correct me if I'm thinking it wrong, 

Have a great day ! 

[Chris.W · Accepted solution]

Hi,

You are almost right for them.

But only one thing, the PD_TAG is also used to do data communication.

Sometimes you could access the device using the PD_TAG.

So the PD_TAG also should be unique in the network.

And considering "set to OOS mode" is another thing.

Just like you said most of time, there is no difference set or not.

But for some devices the PD_TAG cannot be changed if the Block is not in OOS mode.

That is the reason to have this function.

Thanks.

-Chris