Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 64)

Publication 1794-UM065B-EN-E - September 2010
52 1794-IF8IH and 1794-OF8IH Configuration
The I/O module performs automatic retries and therefore a user should rarely
recognize communication problems at the protocol layer. Therefore, this flag
can be used to qualify the communication quality.
Range: 0 = no HART failures are detected, 1 = A HART failure is detected
HART Current Fault (8 of 1 bit each)
Alarm signal for HART Current Fault, indicating the HART data value is
outside the HART Current Fault limit percentage. Active when limit is
exceeded. The analog measured current is compared with the digital current
value, read out dynamically via the HART interface. Active when limit is
exceeded. Refer to HART Current Fault Limit (8 of 5 bits) on page 43.
Range: 0 = normal, 1 = fault detected.
HART Transmitter List (8 of 1 bit each)
Indicates a HART transmitter has been detected on this channel, during the
last rebuild.
Range: 0 = A HART Transmitter was not detected, 1 = A HART Transmitter
is detected.
Secondary Input Data
Table, Cyclic EDT Input
Data The data in the following table is where the HART protocol device data is
published. The data table is not available as a group in the module. It is formed
in the communication adapter by the Cyclic EDT mechanism (adapter to
module) where the adapter cyclically requests a set of module attributes and
forms this data table.
Additionally, the adapter appends the first two words to indicate
communication status between adapter and module with regard to each of the
cyclic EDT transfers. Two (2) words are provided, for status, as today's
adapters provide for up to 32 items in the CEDT queue.