[dba-SQLServer]SQL server licensing

hello all,

We just implemented a new PLC system that stores data in a SQL server.  We
have other software that can access the data from SQL server so that the
managers and QC people can get live reports on how the product is so they
can make good decisions on adjustments etc.  

We just received a email from a company that assisted in installing the PLC
equipment and setting up the software.  they are telling us that we need to
buy FSCAL's for each computer that tries to connect to the SQL server. 
 
Our SQL server is licensed Per Processor, does this FSCAL requirement still
apply to us?  

Thanks in Advance,
Rich