Fault alarm (8 of 1 bit each), Diagnostic data (1 of 8 bits) – Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules User Manual

Page 83

Publication 1794-UM065B-EN-E - September 2010

1794-IF8IH and 1794-OF8IH Configuration 71

Fault Alarm (8 of 1 bit each)

Alarm signal for open wire channel fault, detected at <2 mA (<500 µA in
digital mode) and short circuit (R<42 in the 4…20 mA range, <86 in digital
mode, channel off).

This alarm is disabled when a data format is selected which includes 0 mA.
Range: 0=Normal, 1=Wire off/short circuit fault detected
Default: 0

Diagnostic Data (1 of 8 bits)

Response from module as to its condition.

14/O7

Read

RealT

Output Data Channel 6

15/EDT

Read

RealT

Output Data Channel 7

Where:

Fn : Channel n Fault alarm
Cn : Channel n HART Current Fault
Xn : HART Transmitter List
Dn : Channel n Digital out

1794-OF8IH Primary Data Table

Word/S
ISOC

Read/
Write

Data
Transport

Bit

Diagnostic Status Value: 0

Channel

Failure

0x00

All

No Errors (default)

0x10

Channel 0