ST100 Series HART
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Fluid Components International LLC
HART Diagnostics
Device Status
Bit 0 (“Primary Variable Out of Limits”) refers to the selected PV Dynamic Variable. This does not set bit 7, “Device Malfunction”.
Bit 1 (“Non-Primary Variable Out of Limits”) refers to the device variables Temperature and Pressure out of limits. This does not
set bit 7, “Device Malfunction”.
Bit 4 (“More Status Available” is set whenever a failure reported by a Command 48 status bit being set.
Extended Device Status
The Field Device cannot predict, in advance, when the maintenance will be required. This status byte is set to 1 (Maintenance
Required) when a sensor break is detected.
Additional Device Status (Command #48)
Command #48 returns 25 bytes of data, with the following status information for status bytes 0 through 5. The remaining status
bytes are reserved for future use.
Listed below are definitions for status bytes 0 through 5.
BIT
MEANING
CLASS
DEVICE STATUS BITS SET
0
Serious Device Error
Hardware
4
1
Electronics Hardware Failure
Hardware
4
2
Memory Error
Hardware
4
3
Measurement Failure
Hardware
4, 7
4
Maintenance Required
Hardware
4
5
FRAM Failure
Hardware
4
6
Power Supply Failure
Hardware
4
7
Configuration Invalid
Hardware
4
Status Byte 0
BIT
MEANING
CLASS
DEVICE STATUS BITS SET
0
Device Initialization Failed
Hardware
4
1
Device Not Initialized
Hardware
4
2
Electronic Temperature Too High
Hardware
4
3
Flow Sensor Failure
Hardware
4, 7
4
Flow Sensor Not Connected
Hardware
4,7
5
Sensor Communication Failure
Hardware
4
6
Totalizer Overflow
Hardware
4
7
Flow Is Out Of Range
Hardware
4
Status Byte 1
