Endress+Hauser Proline Prosonic Flow 91, Operating Instructions Manual

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Proline Prosonic Flow 91 Operation
Hauser 39
4.3.4 Universal / common practice HART commands
The following table contains all the universal commands supported by the device.
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 delivers information on the device
and the manufacturer. It 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, 98 = Prosonic Flow 91
– Byte 3: number of preambles
– Byte 4: universal commands rev. no.
– Byte 5: device-specific commands rev. no.
– 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
– Bytes 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: current current of the primary process
variable in mA
– Byte 4-7: %- value 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.
3 Read the primary process variable
as current in mA and four (preset
using Command 51) dynamic
process variables
Access type = Read none 24 bytes are sent as a response:
– Bytes 0-3: primary process variable current in mA
– Byte 4: HART unit code of the primary process
variable
– Bytes 5-8: primary process variable
– Byte 9: HART unit code of the secondary process
variable
– Bytes 10-13: second process variable
– Byte 14: HART unit code of the third process
variable
– Bytes 15-18: third process variable
– Byte 19: HART unit code of the fourth process
variable
– Bytes 20-23: fourth process variable
Factory setting:
• Primary process variable = Volume flow
• Secondary process variable = Totalizer
• Third process variable = Sound velocity
• Fourth process variable = Flow velocity
!
Note!
• Manufacturer-specific units are represented using
the HART unit code "240".