Endress+Hauser PROline promag 53 - Page 75

PROline Promag 53 5Operation
Endress+Hauser 75
44 Write unit of primary process
variable
Access = write
Set unit of primary process variable. Only units
which are suitable for the process variable are
transferred to the device:
Byte 0: HART unit code
Factory setting:
Primary process variable = Volume flow
! Note!
• If the written HART unit code is not the cor-
rect one for the process variable, the device
will continue with the last valid unit.
• If you change the unit of the primary process
variable, this has no impact on the system
units.
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”.
48 Read additional device
status
Access = read
none The device status is displayed in extended form
as the response:
Coding: see table on Page 77
50 Read assignment of the
device variables to the four
process variables
Access = read
none Display of the current variable assignment of
the process 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
Factory setting:
• Primary process variable: Code 1 for volume
flow
• Second process variable: Code 250 for
totalizer 1
• Third process variable: Code 2 for mass flow
• Fourth process variable: Code 0 for OFF (not
assigned)
! Note!
You can set or change the assignment of
device variables to process variables using
Command 51.
Command No.
HART command / Access type
Command data
(numeric data in decimal form)
Response data
(numeric data in decimal form)