Rockwell Automation 1794-OF8IH FLEX Isolated Input/Output HART Analog Modules - Manual (Page 80)

Publication 1794-UM065B-EN-E - September 2010
68 1794-IF8IH and 1794-OF8IH Configuration
Analog Output Mode will follow the Analog Data Format selected.
Digital Output Mode will output 0 mA = OFF, 22 mA = ON if the Fault
Mode is 0 = Disable. Digital Output Mode will output 500 µA = OFF, 22 mA
= ON if the Fault Mode is 1 = Wire off fault detection enable.
Range: 0=Normal analog output, 1=Switched digital output
Default: 0
Analog Mode Fault State (8 of 2 bits each)
Determines how module reacts to faults when channel is used in analog
normal mode.
Range: 0=Go to minimum value of Full Output Range, 1=Go to maximum
value of Full Output Range, 2=Hold last state, 3=Use channel fault state
values given in Words 10…17.
Default: 0
Analog Mode Channel Fault State Value (8 of 16 bits each)
This parameter specifies the fault state value of the analog output data for the
channel. Specific format is controlled by Analog Data Format Control
parameter, see Analog Data Format (8 of 4 bits each) on page 65.
This data is used when the channel is in analog output mode.
Examples
If you choose format 2 and set the fault state value to 11000 (accordingly
110.00%), the I/O module provides 22 mA in case of fault state.
If you choose format 7 and set the fault state value to 32000, the I/O module
provides 11.813 mA in case of fault state.
The fault state value is treated in the same way as the normal output value is
treated. So you do not need to recalculate the current when you are used to
work in a special format.
Range: See Analog Data Format (8 of 4 bits each) on page 65.
Default: 0