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109
6.2 Translating (“TEMPERATURE AIO”).PV and
(“TEMPERATURE SETPOINT AIO”).PV
6.3 Device Self-Diagnosis Status Flags
Example #2
Register Result
Combine
Convert 32 HEX to Floating
Point
25
41C8
41C80000
25.00000
26
0000
Example #3
Register
Result
Combine
Convert 32 HEX to Floating
Point
28
428C
428C0000
70.00000
29
0000
Category 1: Failure Diagnostics
Diagnostic: Fault in Electronics
Functional Behavior:
The following diagnostic flags are set: “Failure Status” and “Fault in Electronics”
(Bit 31 and Bit 27 are set to 1).
Causes and Triggers:
Critical memory failure, security violations, WDT password violation, Flash password violation, PMM
password violation, Peripheral area fetch (stack overflow, pointer access or other logical problem in the
code.
Diagnostic: Faults In Sensor Or Actuator Element
Functional Behavior:
The following diagnostic flags are set: “Failure Status” and “Faults in sensor or actuator element” (Bit 31
and Bit 26 are set to 1).
Causes and Triggers:
Damaged (open or shorted) thermistor resulting in 0.1 Ohm > R or R > 1M Ohm. Damaged (open or
shorted) piezo-electric transducer resulting in 0.1 Ohm > R or R > 1M Ohm.
Diagnostic: Faults Due To Process Influence
Functional Behavior:
The following diagnostic flags are set: “Failure Status” and “Faults due to process influence”
(Bit 31 and Bit 16 are set to 1).
Causes and Triggers:
Excessively high process temp is detected can detect resulting in 290 deg C < Temp < 350 deg C.
Diagnostic: Faults Due To Non-Compliance With Specified Operating Conditions
Functional Behavior:
The following diagnostic flags are set: “Failure Status” and “Faults due to non- compliant operating
conditions” (Bit 31 and Bit 15 are set to 1).
Causes and Triggers:
This diagnostics flag will be set when the on-board oscillator experiences a fault frequency, namely
when the frequenciesgenerated drops below the minimum allowed specification.