Endress+Hauser PROline prosonic flow 93 Operating Instructions Manual page 68

5 Operation
Command No.
HART command / Access type
51 Write assignments of the
device variables to the four
process variables
Access = write
53 Write device variable unit
Access = write
59 Set number of preambles in
message responses
Access = write
68
Command data
(numeric data in decimal form)
Setting of the device variables to the four proc-
ess variables:
– Byte 0: Device variable code to the primary
process variable
– Byte 1: Device variable code to the second
process variable
– Byte 2: Device variable code to the third
process variable
– Byte 3: Device variable code to the fourth
process variable
Code of the support device variables:
See data on Page 62
Factory setting:
• Primary process variable: Volume flow
channel 1
• Second process variable = Totalizer 1
• Third process variable = Sound vel.
channel 1
• Fourth process variable = Flow vel. channel 1
This command set the unit of the given device
variables. Only those units which suit the device
variable are transferred:
– Byte 0: Device variable code
– Byte 1: HART unit code
Code of the supported device variables:
See data on Page 62
!
Note!
• IIf the written unit is not the correct one for the
device variable, the device will continue with
the last valid unit.
• If you change the unit of the device variable,
this has no impact on the system units.
This parameter sets the number of preambles
which are inserts in the message responses:
Byte 0: Number of preambles (2...20)
PROline Prosonic Flow 93
Response data
(numeric data in decimal form)
The variable assignment of the process varia-
bles is displayed as a response:
– Byte 0: Device variable code to the primary
process variable
– Byte 1: Device variable code to the second
process variable
– Byte 2: Device variable code to the third
process variable
– Byte 3: Device variable code to the fourth
process variable
The current unit of the device variables is dis-
played in the device as a response:
– Byte 0: Device variable code
– Byte 1: HART unit code
!
Note!
Manufacturer-specific units are represented
using the HART unit code "240".
As a response, the current number of the pre-
ambles is displayed in the response message:
Byte 0: Number of preambles
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