OPERATION ST100A Series Flow Meter
66 Fluid Components International LLC
ST100A Series HART Common Practice Commands
The ST100A Series supports Common Practice commands 35, 40, 42, 44, 45, 46, 50 and 51. Table 13 below summarizes the instrument’s
HART Common Practice command set and the data associated with each command.
Table 13 – HART Common Practice Commands
Command 35: Write Primary Variable (PV) Range Values
PV Upper and Lower Range Values Units Code
PV Upper Range Value (Customer Max. Flow Limit)
PV Lower Range Value (Customer Min. Flow Limit)
PV Upper and Lower Range Values Units Code
See Table 17, page 74, for response code list.
Note: 1. The value returned in the response data bytes reflects the rounded or truncated value actually used by the device.
Notes: 1. Specify a value (in mA) to drive Ch. 1 to a particular output value. Specify “0” to exit the fixed current mode.
Note:
1. Send Command 42 (no data) to reset the instrument. No response is returned due to reboot.
Note:
1. The value returned in the response data bytes reflects the value actually used by the device.
Note: 1. T
he value returned in the response data bytes reflects the rounded or truncated value actually used by the device.
Command 40: Enter/Exit Fixed Current Mode
PV Fixed Current Level (mA units); “0” to Exit Fixed Current
See Table 17, page 74, for response code list.
Command 42: Perform Device Reset (Soft Reset of Flow Meter)
1
See Table 17, page 74, for response code list.
Command 44: Write Primary Variable Units
See Table 17, page 74, for response code list.
Command 45: Trim DAC Zero – Measured Current Chan #1 (in mA)
Ext. Measured Current Ch. #1 Level (4 mA Zero_DAC)
Actual Measured Current Ch. #1 Level (4 mA Zero_DAC)
See Table 17, page 74, for response code list.
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