Location2, Location3 – Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide User Manual

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FactoryTalk Historian To Historian Interface User Guide

Location2

Location2

specifies data timestamp adjustment. The source Historian Server supplies a

timestamp for each data event. Users have the option of adjusting these timestamps to
account for time differences between Historian Servers. It is required that each Historian
Server have the correct system time for its configured time zone. See section

Data

Timestamps

for a complete discussion.

Location2
Value

Adjust for Time
Zone
Differences

Do Not Adjust for
Time Zone
Differences*

Adjust for
Clock Drift**

Truncate Sub-Second
Timestamps***

Yes

* Only available if source and/or receiving Historian Server is a PI2 system.
** Receiving Historian Server is the time master. Timestamps are adjusted to receiving Historian
Server time. An offset of 30 minutes or less is considered clock drift.
***Truncating sub-second timestamps can lead to data loss during history recovery and archive data
scanning if multiple events are stored within the same second. Use with caution.

Location3

Location3

is used to configure what interface status events are written to a tag.

„IO Timeout‟ status events will result in a data gap for periods of Historian Server
disconnection. See section

Interface Status Events

for a complete discussion.

If a tag is configured for archive data collection, this attribute also specifies whether or not
the snapshot value is included with each scan update.

Location3
Value

Write
“I/O Timeout”

Write
“Access Denied”

Include
Snapshot

Point Level
Debugging

Yes