Honeywell FlexLine SmartServo 954, Service Manual

Page: 159 / 304

COMMISSIONING
Part No.: 4417340 Revision 1 Service Manual 151
954 SmartServo FlexLine
7.3.9.3 Other HCI-HAO features

Planar transformer
for galvanic isolation from HART bus
.

Malfunctioning
of the HCI-HAO card (or any linked cards) is
revealed on the HART bus by means of the
device status
.
 If any
fatal errors
occur during operation - which will run the
program into an undesired situation - then a software reset
(Warm Reset) is given to the HCI-HAO software. During this
situation, the output of the module remains at the desired
level till the software starts normal working. Handling of a
fatal error is a general FlexConn function. This will update
the appropriate entity as well.

Unit conversions
for the linked variables are possible. All
the linked variables available through linking (data read from
other FlexConn boards) are in SI units. Accepted units are
listed in the table below.
Sensor Type Accepted HART Units Abbreviation
HART Unit
Code
Temperature Degrees Celsius °C 32
Degrees Fahrenheit °F 33
Pressure Pounds per square inch psi 6
Pascal Pa 11
Kilo Pascal kPa 12
Level Feet ft 44
Meters m 45
Inches in 47
Density Kilograms per cubic meter kg/m
3
92
Pounds per cubic foot lb/ft
3
94
Degrees API API 104

Analog output read back
mechanism, which is used to
indicate any errors in the analog output section. An error
can be indicated using the control relay on the FII-DO
module over the CAN bus. If some error is found in the DAC
read back, then the same is updated in function 2 (sensor)
health, as per following details in status and status codes:
Status <BAD>
Status Category
<GENERAL_HARDWARE_FAIL>
Status Code
<DAC_READ-BACK_FAIL>

Active and Passive mode
of operation for Loop current.