Fluid Components Intl ST51A - Page 49

ST51A/ST75A/ST75AV Mass Flow Meters OPERATION
Fluid Components International LLC 41
Command 3: Read Dynamic Variable (Flow) and Loop Current
Byte
Format
Description
Request Data Bytes
None
Response Data Bytes
0–3
Float
PV Loop Current: 4-20 mA
4
Enum
PV HART Unit Code, Flow
5–8
Float
PV Flow Value
Response Codes:
See Table 16, page 53, for response code list.
Command 6: Write Polling Address
Byte
Format
Description
Request Data Bytes
0
Unsigned-8
Polling Address of Device
1
Enum
Loop Current Mode
Response Data Bytes
0
Unsigned-8
Polling Address of Device
1
Enum
Loop Current Mode
Response Codes:
See Table 16, page 53, for response code list.
Command 7: Read Loop Configuration
Byte
Format
Description
Request Data Bytes
None
Response Data Bytes
0
Unsigned-8
Polling Address of Device
1
Enum
Loop Current Mode
Response Codes:
See Table 16, page 53, for response code list.
Command 8: Read Dynamic Variable Classifications
Byte
Format
Description
Request Data Bytes
None
Response Data Bytes
0
Enum
Primary Variable Classification
1
Enum
Secondary Variable Classification
2
Enum
Tertiary Variable Classification
3
Enum
Quaternary Variable Classification
Response Codes:
See Table 16, page 53, for response code list.