Endress+Hauser Proline Prosonic Flow 91 Operating Instructions Manual page 36

Operation
The following table contains all the common practice commands supported by the device.
Command No.
HART command / Access type
Common practice commands
34 Write damping value for primary
process variable
Access = Write
35 Write measuring range of primary
process variable
Access = Write
38 Device status reset "Configuration
changed"
Access = Write
40 Simulate output current of
primary process variable
Access = Write
42 Perform device reset
Access = Write
44 Write unit of primary process
variable
Access = Write
48 Read extended device status
Access = Read
36
Command data
(numeric data in decimal form)
Byte 0-3: damping value of the primary process
variable in seconds
Factory setting:
Primary process variable = Volume flow
Write the desired measuring range:
– Byte 0: HART unit code for the primary process
variable
– Byte 1-4: end of measuring range, value for 20 mA
– Bytes 5-8: start of measuring range, value for 4 mA
Factory setting:
Primary process variable = Volume flow
!
Note!
• If the HART unit code is not the correct one for the
process variable, the device will continue with the
last valid unit.
none
!
Note!
This HART command can also be executed if the write
protection is switched on (= ON)!
Simulation of the desired output current of the primary
process variable. An entry value of 0 exits the
simulation mode:
Byte 0-3: output current in mA
Factory setting:
Primary process variable = Volume flow
none
Specify the unit of the primary process variable. Only
units which are suitable for the process variable are
accepted by the device:
Byte 0: HART unit code
Factory setting:
Primary process variable = Volume flow
!
Note!
• If the written HART unit code is not the correct one
for the process variable, the device will continue
with the last valid unit.
• A change of the unit of the primary process variable
has a direct impact on the system units.
none
Proline Prosonic Flow 91
Response data
(numeric data in decimal form)
Displays the current attenuation constant in the
device:
Bytes 0-3: attenuation constant in seconds
The currently set measuring range is shown as the
response:
– Byte 0: HART unit code for the set measuring range
of the primary process variable
– Byte 1-4: end of measuring range, value for 20 mA
– Bytes 5-8: start of measuring range, value for 4 mA
!
Note!
Manufacturer-specific units are represented using the
HART unit code "240".
none
The momentary output current of the primary process
variable is displayed as a response:
Byte 0-3: output current in mA
none
The current unit code of the primary process variable
is displayed as a response:
Byte 0: HART unit code
!
Note!
Manufacturer-specific units are represented using the
HART unit code "240".
The current device status is displayed in extended
form as the response:
Encoding: see Table → ä 38.
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