Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual - Manual (Page 41)

Publication 1797-6.5.3 - March 2006
Understand Configurable FLEX Ex Analog Module Features 2-11
Fault Alarm
Fault Alarm selects whether the channel pair fault detection is enabled or
disabled. There is a 100 Hz (10 ms) filter for wire off/lead break detection.
Use your programming software to set the Fault Alarm. Set the feature bit to 0
to disable the alarm. Set the bit to 1 to enable wire off/lead break fault
detection.
8 — — — Not assigned — — —
9
10
11 D/A count
as 0…20
mA 0.28% of
0…20 mA 0…22 mA 0…8000
(0…22 mA) 363 Min=0 mA
Max=22 mA
Hold
last=hold
50%=11 mA
12 4…20 mA — — Not assigned — — —
13 % as
4…20 mA 0.16% of
4…20 mA 3…21 mA -625 …+10625
(2’s complement)
(-6.25…+106.25
%) 625 Min=3 mA
Max=21 mA
Hold
last=hold
50%=12 mA
14 % as
4…20 mA 0.16% of
4…20 mA 2…22 mA -1250…+11250
(2’s complement)
(-12.50…+112.5
0%) 625 Min=2 mA
Max=22 mA
Hold
last=hold
50%=12 mA
15 — — — Not assigned — — —
Table 2.4 1797-OE8H Data Formats
Data
Format Format Resolution Full
Output
Range
Module Data Processing Data Table Value
(Interpretation) Count
per mA Analog Fault
State
Output = 22
datatable (
8000
)
Output = 16
datatable (
10000
)
+ 4
Output = 16
datatable (
10000
)
+ 4