# Siemens PCS7 and ISO-Protocol **URL:** \ **Category:** General Discussion\ **Created:** [December 6, 2013, 12:38am UTC](https://forum.inductiveautomation.com/t/siemens-pcs7-and-iso-protocol/7673 "2013-12-06T00:38:04Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Flintstone](https://avatars.discourse-cdn.com/v4/letter/f/aeb1de/32.png) [@Flintstone](https://forum.inductiveautomation.com/u/Flintstone)\ **Post date:** [December 6, 2013, 12:38am UTC](https://forum.inductiveautomation.com/t/siemens-pcs7-and-iso-protocol/7673/1 "2013-12-06T00:38:04Z")
I am interested in using the Ignition OPC-UA Server with a Siemens PCS7 system (CPU 416-DP and CPU 417 processors) that uses the ISO-Protocol on the system bus. (Our configuration is similar to the configuration in this link - in particular see step 4) : [http://support.automation.siemens.com/CN/llisapi.dll?func=cslib.csinfo&objId=23990630&load=treecontent&lang=en&siteid=cseus&aktprim=0&objaction=csview&extranet=standard&viewreg=CN](http://support.automation.siemens.com/CN/llisapi.dll?func=cslib.csinfo&objId=23990630&load=treecontent&lang=en&siteid=cseus&aktprim=0&objaction=csview&extranet=standard&viewreg=CN) I have contacted other OPC Server vendors and their software will not work with the ISO-Protocol and MAC addressing. Their products only work with TCP/IP Ethernet. Can someone tell me if I can use Ignition’s OPC-UA server with only a MAC address? (No IP addresses are used on our system bus.) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [December 6, 2013, 1:01am UTC](https://forum.inductiveautomation.com/t/siemens-pcs7-and-iso-protocol/7673/2 "2013-12-06T01:01:07Z")
No, our Siemens drivers only support the S7 protocol over TCP.