Field descriptions – Rockwell Automation 1797-IE8NF FLEX Ex 8 Input Analog, HART and Noise Filter Module User Manual
Page 27
FLEX Ex 8 Input Analog, HART, and Noise Filter Analog Modules 27
Publication
1797-5.5 - September 2011
Field Descriptions
Analog Input Data
Specifies the value of the analog input data from the module. Specific
format is controlled by Module Data Format Control parameter. This
data is used when the channel is in analog input mode.
Overrange Alarm
Alarm signal for input overrange. This signal is always active.
Range: 0 = normal, 1 = input overrange
Underrange Alarm
Alarm signal for input underrange. This signal is always active.
Range: 0 = normal, 1 = input underrange
Remote Fault Alarm Alarm from remote transmitter, indicating transmitter difficulties,
sensor difficulties, or loop to the sensor is open. If not using a remote
transmitter, this alarm can be used as a high-high or low-low alarm.
Depending on Data Format, these current values may be indicated by
percent, mA, or integer values.
Range: 0 = normal, 1 = fault detected
Local Fault Alarm
Alarm indicating the loop to the transmitter, or, if there is no transmitter,
the loop is open or shorted. When active, this alarm triggers at 2 mA
and 22 mA for open and short respectively. Depending on Data Format,
these current values may be indicated by percent, mA, or integer
values.
Range: 0 = normal, 1 = fault detected
HART Rebuild Bit
(1797-IE8H)
The HART Rebuild bit will trigger a HART Rebuild on a transition from 0
to 1. The HART Rebuild bit must remain 1 for HART communications to
function after the rebuild completes. If the HART Rebuild bit is set to 0,
HART communications are disabled.
HART Rebuild Flag
(1797-IE8H)
During the time the system is rebuilding the HART table, the HART
rebuild flag is set.
Range: 0 = normal, 1 = HART rebuilding
HART Failure
(1797-IE8H)
A 1 indicates that HART communications are failing on the associated
channel.
Range: 0 = normal, 1 = HART communication failure
HART
Communication
Fault (1797-IE8H??)
When this bit is set (1), it indicates that HART communications are
failing on the associated channel.
Range: 0 = normal, 1 = HART communication fault