ST100 Series HART
32 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
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