Siemens S7-200 & FM 350-1

[bhedding024]

We are replacing an existing FM 350-1 module in an existing installation. If it's a one- for- one swap, do we need to change or update anything in the hardware configuration? Do we need to go online and navigate to the module to set any parameters? I've fone this before but it's been about 10 years lol. Thank you!

 

[sigmadelta]

Short answer - no... as long as it's a FM350-1 module you're replacing it with. Generally even if the newer module has a different part#, it can just be installed in place of the old one with no configuration changes.

Just for confirmation, what is the old part# and the new part# of the FM 350-1?

 

[bhedding024]

The order number is 6ES7 350-1AH03-0AE0
Thank you.

 

[sigmadelta]

If both are the same part number there's no issue.

 

[bhedding024]

If that is the case then any thoughts on why we are seeing the errors in the picture?

 

[sigmadelta]

That's an SM338 POS module... not an FM 350-1 module

 

[sigmadelta]

Also, when putting the front screw terminal on the replacement S7-300 module, you have to remove the white circular "tabs" that are on it. Otherwise the screw terminal will not plug all the way down onto the module. Hence the "No auxiliary voltage" error.

But, still, you cannot put a SM 338 POS module in place of an FM 350-1 module.

 

[sigmadelta]

Siemens calls them "coding pins". If the coding pins are not on the "new" module, then it means the front connector from the SM 338 POS module cannot be plugged onto the FM 350-1 because they are different modules.

 

[sigmadelta]

You need to confirm whether your existing module is a FM350-1 or a SM 338 POS module.

 

[bhedding024]

Good point. They told me they replaced the 350. I sounds have noticed the faults are on the module to the right of it. There is one 350 then two 338's next to it.

 

[sigmadelta]

Maybe the screw terminal on the faulty 338 is not pushed in all the way... maybe it got bumped when replacing the 350-1.