Hart Diagnostic Details; Table 27 - Hart Critical And Non-Critical Diagnostic Details - Honeywell STT850 Series User Manual

9.2 HART Diagnostic Details

Table 27 lists and describes the HART critical and non-critical HART diagnostic details.
Table 27 – HART Critical and Non-Critical Diagnostic Details
<Return>
Active Diags
Sensor Module
Comm Module
Critical
Sensor Comm
Input 1
Input 2 (Dual
Inputs only)
<Return>
Active Diags
Cal 1 Correct
Cal 2 Correct
(Dual Inputs only)
(HART/FF only)
Sensor Temp
Input 1 Range
Input 2 Range
Non Critical
(Dual Inputs only)
CJ Range
Input 1
Input 2 (Dual
Inputs only)
Input 1 TB6
Input 2 TB8 (Dual
Inputs only)
Factory Cal
Supply Voltage
Revision 4.0
# #
OK
FAULT
OK
FAULT
OK
FAULT
OK
FAULT
OK
FAULT
# #
OK
EXCESSIVE
OK
EXCESSIVE
OK
OUT OF RANGE
OK
OUT OF RANGE
OK
OUT OF RANGE
OK
OUT OF RANGE
OK
OPEN
OK
OPEN
OK
OPEN
OK
OPEN
OK
NO FACTORY CAL
OK
LOW OR HIGH
STT850 Series HART/DE Option User's Manual
Description
FAULT: There is a problem with the
Sensor Module
FAULT: There is a problem with the
Electronics Module (HART, DE, or
Fieldbus)
FAULT: There is a problem with the
interface between the Sensor Module
and the Electronics Module.
FAULT: There is a problem with the
Input 1 sensor
FAULT: There is a problem with the
Input 2 sensor
Shows the number of Non-Critical
Diagnostics that are currently active
EXCESSIVE: Input applied exceeds
5% of expected value
EXCESSIVE: Input applied exceeds
5% of expected value
Electronics temperature is greater

than 85 C
OUT OF RANGE:
Input 1 temperature is greater than
Sensor 1 URL or less than Sensor 1
LRL
OUT OF RANGE:
Input 2 temperature is greater than
Sensor 2 URL or less than Sensor 2
LRL
OUT OF RANGE: Cold Junction
temperature is greater than 85C or
less than -40C.
OPEN: Input 1 is open.
OPEN: Input 2 is open.
OPEN: Input
1 Terminal TB6 is open.
OPEN: Input 2 Terminal TB8 is open.
The transmitter has not been
calibrated by the factory.
LOW: Supply voltage is below the
low specification limit.
HIGH: Supply voltage is above the
high specification limit.
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