ST80/ST80L Flow Meter OPERATION
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Modbus Exception Codes Table
Table 23 below summarizes the possible Modbus exception codes for the ST80/ST80L.
Table 23 – ST80/ST80L Modbus Exception Codes
The Data address received in the query is not an
allowable address for the master/slave
A value contained in the query data field is not an
allowable value for master/slave
Modbus Variables and Registers Map Table
Table 24 below summarizes the Modbus variables and registers for the ST80/ST80L.
Table 24 – ST80/ST80L Modbus Variables and Registers Map
Variables/Parameter
Register
Data Type Access
Flow MS (of float32 value)
Flow LS (of float32 value)
Temp. MS (of float32 value)
Temp. LS (of float32 value)
Totalizer1 MS (of float64 value)
Totalizer1 LS (of float64 value)
Totalizer2 MS (of float64 value)
Totalizer2 LS (of float64 value)
Pressure MS (of float32 value)
Pressure LS (of float32 value)
Totalizer Modulo MS (of float32 value)
Totalizer Modulo LS (of float32 value)
Totalizer Rollover MS (of float32 value)
Totalizer Rollover LS (of float32 value)
Reset Totalizer (input “ABCD” hex)
Enable/Disable Totalizer (1 = Enable, 0= Disable)
Totalizer MS (of float64 value)
Totalizer LS (of float64 value)
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