Rockwell Automation 1756-HIST2G Historian ME 2.1 - Manual (Page 275)

F • D ESIGN C ONSIDERATIONS AND L IMITATIONS
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Data Transfer
This section describes Data Transfer service considerations.

The initial release of FactoryTalk Historian ME only supports Data Transfer to a
single FactoryTalk Historian SE server. Collectives are not supported. If data is
required in third-party h istorians or other upstream servers, use FactoryTalk
Historian DataLink to move data out of the module. Upcoming product releases
will support alternate Data Transfer destinations.
Observe the following Data Transfer subsystem limits on the module:

Transfer a minimum of 5,000 events per second to the FactoryTalk Historian SE
archive.

Transfer a maximum of 150,000 events FactoryTalk Historian SE archive.
Data Storage
This section contains Data Storage considerations. The FactoryTalk Historian ME is
available in two versions: one with 1GB of total storage, and one with 2GB of total
storage.

Observe the following archive file size limits on the module:

The 1GB module has an effective archive storage capacity of 0.5GB because
approximately 500MB is used for the operating system, firmware, and log files.
The 2GB module has an effective archive storage capacity of 1.5GB.

The on-board data storage for the FactoryTalk Historian ME is limited. using a
Data Transfer rate of 2500 events per second (the maximum transfer rate
available) without Compression or Exception Filtering, the on-board storage
capacity is approximately four hours for the 1GB module and 14 hours for the
2GB module. Therefore, Rockwell highly recommends that you include the
Module Type File Size Number of
Files
Disk Space for
Archive
1G 10MB 40 files 400MB
2G 10MB 130 files 1.3GB