Rockwell Automation FactoryTalk Historian SE 3.0 UniInt Interface User Guide - Manual (Page 49)

UniInt Interface User Manual 43
Device Status
ExDesc Keyword: [UI_DEVSTAT]
Update Interval: On startup, on change, and shutdown.
Description:
The device status tag stores communication information about the interface and the foreign
device. This tag will be evaluated only while the heartbeat tag is updating. The device status
tag is a string type Historian point. During normal shutdown of the interface, the string text
of ―4 | Intf Shutdown‖ will be written to this tag.
Format: n | uniint provided string text | interface specific text (when provided).
The ‗n‘ value in the text and the pipe separator are formatting devices which may be used to
quickly parse and analyze the value of the device status tag.
The update values and meaning of this tag are as follows.

System Digital State ―Good‖ – the interface is properly communicating with the
foreign device and is able to read/write data to the device as required. When in
this state, the system digital state of ―Good‖ will be written to the Device Status
tag.
 ―1 | Starting‖ – the interface is starting.
 ―2 | Connected / No Data‖ – the interface is connected to the foreign device.
While in this state, the interface is not capable or reading or writing data to the
foreign device. Optional text that may be provided by the interface is appended
to the UniInt provided string value.
 ―3 | n device(s) in error‖ – the interface is not able to communicate with n
device(s). Optional text that may be provided by the interface is appended to the
UniInt provided string value.
 ―4 | Intf Shutdown‖ – the interface is shutting down.
 ―5 | interface_spcific_message‖ – Text provided by the interface will be the only
text following the ―5 |‖.
Interface Point Count
ExDesc Keyword: [UI_POINTCOUNT]
Update Interval: On startup, on change, and shutdown.
Description:
Counts number of Historian tags loaded by the interface. This count includes all input, output
and triggered input tags. This count does NOT include any Interface Health tags or
performace points.
IO Rate
ExDesc Keyword: [UI_IORATE]