Operation Proline Prowirl 73
42 Endress+Hauser
5.4.4 Universal/common practice HART commands
The following table contains all the universal and common practice commands supported by the
measuring 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 the unique device identifier
Access type = Read
None The device identifier provides information on the device
and manufacturer; it cannot be altered.
The response consists of a 12-byte device ID:
– Byte 0: fixed value 254
– Byte 1: manufacturer ID, 17 = Endress+Hauser
– Byte 2: device type ID, 56 = Prowirl 73
– Byte 3: number of preambles
– Byte 4: rev. no. universal commands
– Byte 5: rev. no. device-spec. commands
– Byte 6: software revision
– Byte 7: hardware revision
– Byte 8: additional device information
– Byte 9-11: device identification
1 Read the primary process variable
Access type = Read
None – Byte 0: HART unit ID of the primary process variable
– Byte 1-4: primary process variable (= volume flow)
!
Note!
Manufacturer-specific units are represented using the
HART unit ID "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: percentage of the set measuring range
Primary process variable (vol. flow)
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:
– Byte 0-3: current of the primary process variable
in mA
– Byte 4: HART unit ID of the primary process variable
– Byte 5-8: primary process variable
– Byte 9: HART unit ID of the secondary process
variable
– Byte 10-13: secondary process variable
– Byte 14: HART unit ID of the third process variable
– Byte 15-18: third process variable
– Byte 19: HART unit ID of the fourth process variable
– Byte 20-23: fourth process variable
Factory setting:
• Primary process variable (vol. flow)
• Secondary process variable = temperature
• Third process variable = mass flow
• Fourth process variable = totalizer 1
!
Note!
Manufacturer-specific units are represented using the
HART unit ID "240".
6 Set HART short-form address
Access type = Write
Byte 0: desired address (0 to 15)
Factory setting:
0
!
Note!
With an address > 0 (multidrop mode), the current
output of the primary process variable is fixed to 4 mA.
Byte 0: active address
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