Endress+Hauser Prosonic Flow 90, Operating Instructions Manual

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5 Operation Proline Prosonic Flow 90
52 Hauser
5.5.4 Universal / common practice HART commands
The following table contains all the universal and common practice commands supported by
Prosonic Flow 90.
Command No.
HART command / Access type Command data
(numeric data in decimal form)
Response data
(numeric data in decimal form)
Universal Commands
0 Read unique device identifier
Access type = read
none Device identification provides information on the
device and manufacturer and cannot be changed.
The response consists of a 12 byte device ID:
– Byte 0: fixed value 254
– Byte 1: Manufacturer ID, 17 = E+H
– Byte 2: Device type ID, 88 = Prosonic Flow 90
– Byte 3: Number of preambles
– Byte 4: Rev. no. universal commands
– Byte 5: Rev. no. device-specific commands
– Byte 6: Software revision
– Byte 7: Hardware revision
– Byte 8: Additional device information
– Byte 9
–
11: Device identification
1 Read primary process variable
Access type = read
none – Byte 0: HART unit code of the primary process
variable
– Byte 1
–
4: Primary process variable
Factory setting:
Primary process variable = Volume flow
!
Note!
• You can set or change the assignment of device
variables to process variables using Command 51.
• Manufacturer-specific units are represented using
the HART unit code “240”.
2 Read the primary process variable
as current in mA and percentage
of the set measuring range
Access type = read
none – Byte 0
–
3: Present current of the primary process
variable in mA
– Byte 4
–
7: Percentage of the set measuring range
Factory setting:
Primary process variable = Volume flow
!
Note!
You can set or change the assignment of device
variables to process variables using Command 51.