Rockwell Automation FactoryTalk Historian SE 3.0 H2H Interface User Guide - Manual (Page 129)

FactoryTalk Historian To Historian Interface User Guide 123
foreign device connections to the interface. This value will always be less than or equal to the
Expected Connections.
“Device Expected Connections” (.Device_Expected_Connections)
The .Device_Expected_Connections Performance Counters Point stores the total number of
foreign device connections for the interface. This is the expected number of foreign device
connections configured that should be working properly at runtime. If the interface can only
communicate with 1 foreign device then the value of this counter will always be one. If the
interface can support multiple foreign device connections then this is the total number of
expected working connections configured for this Interface.
“Device Status” (.Device_Status)
The .Device_Status Performance Counters Point stores communication information about the
interface and the connection to the foreign device(s). The value of this counter is based on the
expected connections, actual connections and value of the
/PercentUp command line
option. If the device status is good then the value is „0‟. If the device status is bad then the
value is „1‟. If the interface only supports connecting to 1 foreign device then the
/PercentUp command line value does not change the results of the calculation. If for
example the interface can connect to 10 devices and 5 are currently working then the value of
the
/PercentUp command line parameter is applied to determine the Device Status. If the
value of the /PercentUp command line parameter is set to 50 and at least 5 devices are
working then the DeviceStatus will remain good (i.e. have a value of zero).
“Failover Status” (.Failover_Status)
The .Failover_Status Performance Counters Point stores the failover state of the interface
when configured for UniInt interface level failover. The value of the counter will be „0‟ when
the interface is running as the „Primary‟ interface in the failover configuration. If the interface
is running in backup mode then the value of the counter will be „1‟.
“Interface up-time (seconds)” (.up_time)
The .up_time Performance Counters Point indicates the amount of time (in seconds) that this
Interface has been running. At startup the value of the counter is zero. The value will
continue to increment until it reaches the maximum value for an unsigned integer. Once it
reaches this value then it will start back over at zero.
“IO Rate (events/second)” (.io_rates)
The .io_rates Performance Counters Point indicates the rate (in event per second) at which
this Interface writes data to its input tags.
(As of UniInt 4.5.0.x and later this performance
counters point will no longer be available.)
“Log file message count” (.log_file_msg_count)
The .log_file_msg_count Performance Counters Point indicates the number of messages that
the interface has written to
the log file . This point is similar to the [UI_MSGCOUNT]
Health Point.