TAI

Unified Architecture topics related to OPC UA Specification, compliant behavior and any technical issues of OPC UA, like Security, Information Model, Companion Specs DI, PLCopen, ADI, ...

Moderator: Support Team

Post Reply
bswann
Jr. Member
Jr. Member
Posts: 4
Joined: 08 May 2017, 11:00

TAI

Post by bswann »

Hi,

I see that the standards mention that TAI may be used instead of UTC, wherever the UtcTime data type is used: see Part 3 clause 8.38. How would a client be aware of which time standard a server is using? I do not see this modelled in the server capabilities.

Kind regards,
Brett Swann

User avatar
Support Team
Hero Member
Hero Member
Posts: 2529
Joined: 18 Mar 2011, 15:09

Re: TAI

Post by Support Team »

Hi Brett,

There is currently no representation of clock details in the standard OPC UA information model. There is also nothing in the upcoming OPC UA version 1.04.

There was a discussion in the OPC UA working group about adding representation of different clocks but this is not covered yet but may be added in one of the next versions e.g. 1.05 since with TSN, OPC UA applications will have to manage different clocks like wall clock and network clock(s).
Best regards
Unified Automation Support Team

bswann
Jr. Member
Jr. Member
Posts: 4
Joined: 08 May 2017, 11:00

Re: TAI

Post by bswann »

Thank you, that is helpful to know.

Kind regards,
Brett

Post Reply