Receiving C37-118 UDP data

GPA Products PMU Connection Tester
1

Hi,

I am using a SEL-735 device. The device has a capability to send continuous waveform data using C37-118 protocol using UDP at 3ksps. I am trying to test it using PMU connection tester, but I am getting a error. Below is the error I am receiving.

“Attempting connection to “ID 1 using IEEE C37.118.2-2011 over Udp” at 02/05/2025 10:26:53 using IEEE C37.118.2-2011
Exception: Attempting to realign parsing to found protocol sync-byte after parsing exception: Bad data stream, expected sync byte 0xAA as first byte in IEEE C37.118 frame, got 0x00
Exception: Probable frame misalignment detected, forcing scan ahead to next sync byte
Exception: Attempting to realign parsing to found protocol sync-byte after parsing exception: Bad data stream, expected sync byte 0xAA as first byte in IEEE C37.118 frame, got 0x00
Exception: Probable frame misalignment detected, forcing scan ahead to next sync byte
Exception: Attempting to realign parsing to found protocol sync-byte after parsing exception: Bad data stream, expected sync byte 0xAA as first byte in IEEE C37.118 frame, got 0xDC”

Thanks,
Rabi Kar,

2

Hi Rabi,

The SEL devices can send continuous waveform data in a modified version of C37.118.2
Note that the standard does not support waveform data.
The PMU Connection tester will only work with standard C37.118.2-2011 (or 2005) and not the modified version.

For the moment there are no plans to support the modified version.

Thank you,
Christoph Lackner

3

Hi Clackner,
Thanks for the reply. Is there any other way we can accept the data and save it.
Thanks,
Rabi Kar.