# Communicating with a C37.118.1a-2014 protocol device

**URL:** <http://discussions.gridprotectionalliance.org/t/communicating-with-a-c37-118-1a-2014-protocol-device/1311>\
**Category:** PMU Connection Tester\
**Created:** [September 17, 2024, 12:30am UTC](http://discussions.gridprotectionalliance.org/t/communicating-with-a-c37-118-1a-2014-protocol-device/1311 "2024-09-17T00:30:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Hschiratti](http://discussions.gridprotectionalliance.org/letter_avatar_proxy/v4/letter/h/96bed5/32.png) [@Hschiratti](http://discussions.gridprotectionalliance.org/u/Hschiratti)\
**Post date:** [September 17, 2024, 12:30am UTC](http://discussions.gridprotectionalliance.org/t/communicating-with-a-c37-118-1a-2014-protocol-device/1311/1 "2024-09-17T00:30:54Z")

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Hi everyone!

I’m trying to use PMU Connection Tester V4.7.4 to communicate with a PMU Unit, make Siemens Siprotec model 7SJ82. The device support C37.118.1a-2014 protocol version. Do you think it will be possible to communicate this version of the Tester with that PMU unit?. I’ve tried with UDP variant with no success; everytime the PMU closes the communication at the first attempt.

Thanks a lot!

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**Author:** ![ritchiecarroll](http://discussions.gridprotectionalliance.org/user_avatar/discussions.gridprotectionalliance.org/ritchiecarroll/32/2_2.png) [@ritchiecarroll](http://discussions.gridprotectionalliance.org/u/ritchiecarroll)\
**Post date:** [September 17, 2024, 12:55am UTC](http://discussions.gridprotectionalliance.org/t/communicating-with-a-c37-118-1a-2014-protocol-device/1311/2 "2024-09-17T00:55:10Z")

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The “.1” standards of the IEEE protocol describe the metrology of phasors, not their broadcast, i.e., data reporting; this is handled by the “.2” versions of the protocol. These are the currently published reporting standards:

`IEEE C37.118-2005`: Metrology + Reporting in same document  
`IEEE C37.118.2-2011`: Reporting only, Metrology moved to “.1” document  
`IEEE C37.118.2-2024`: Reporting only - standard still pending publication

Note that UDP communications can be tricky - make sure to firewalls allow communications.

Hope that helps!

Thanks,  
Ritchie