Fluid Components Intl ST51A, Installation, Operation & Maintenance Instruction Manual

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ST51A/ST75A/ST75AV Mass Flow Meters OPERATION
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ST51A/ST75A/ST75AV HART Device Specific Commands
In the HART protocol all commands defined as Manufacturer Specific, or Device Specific start at command 128. Use the device specific
commands to setup and configure the ST51A/ST75A/ST75AV instrument via HART.
Table 14 below summarizes the instrument’s HART Device Specific command set and the data associated with each command.
Table 14 – HART Device Specific Commands
Command 137: Read Totalizer And Rollover Values
Byte Format Description
Request Data Bytes None
Response Data Bytes 0–3 Float Totalizer
4–7 Integer Rollover
Response Codes: See Table 16 , page 53 , for response code list.
Command 138: Read Totalizer State
Byte Format Description
Request Data Bytes None
Response Data Bytes 0 Unsigned-8 Totalizer State: 0 = OFF; 1 = ON
Response Codes: See Table 16 , page 53 , for response code list.
Command 139: Write Totalizer State
Byte Format Description
Request Data Bytes 0 Unsigned-8 Totalizer State: 0 = OFF; 1 = ON
Response Data Bytes 0 Unsigned-8 Totalizer State: 0 = OFF; 1 = ON
Response Codes: See Table 16 , page 53 , for response code list.
Command 140: Read Device Information
Byte Format Description
Request Data Bytes None
Response Data Bytes 0–9 Bits Device CO
10–19 Bits Device Serial Number
19–22 Bits Device Software Version
Response Codes: See Table 16 , page 53 , for response code list.
Command 141: Write Totalizer Reset
Byte Format Description
Request Data Bytes 0–1 Unsigned-16 Reset Key = 0xABCD
Response Data Bytes 0–1 Unsigned-16 Reset Key = 0xABCD
10–19 Bits Device Serial Number
19–22 Bits Device Software Version
Response Codes: See Table 16 , page 53 , for response code list.
Command 145: Read Customer Engineering Units
Byte Format Description
Request Data Bytes None
Response Data Bytes 0 Unsigned-8 Units Code for Flow
1 Unsigned-8 Units Code for Temperature
2 Unsigned-8 Units Code for Totalizer
Response Codes: See Table 16 , page 53 , for response code list.