Proline Promag 55 FOUNDATION Fieldbus
Commissioning
Hauser
67
Configuration of the "Analog Output function block" (base index 2300)
The measuring device has an Analog Output function block that can be assigned to the various
process variables.
!
Note!
The process value transmitted to the Analog Output function block by the density measuring device
must be greater than 0, in order to avoid the status BAD or UNCERTAIN.
The following example shows how the value of a density measuring device (e.g. Gammapilot M) for
operating density ( "System Value - Fixed Density" parameter,
71) can be read in via the
Analog Output function block.
Firstly, a connection must be established between the Analog Output function block and the
"System Value - Fixed Density" parameter in the "Flow" Transducer Block. In addition, the value
"4" (density) must be assigned to the CHANNEL parameter.
25. Enter the desired name for the Analog Output function block (optional). Factory setting:
ANALOG_OUTPUT_xxxxxxxxxxx
26. Open the Analog Output function block.
27. Set the operating mode in the MODE_BLK parameter group (TARGET parameter) to OOS, i.e.
block Out Of Service.
28. Using the CHANNEL parameter, select "Density" which is to be used as the input value for the
Transducer Block algorithm (scaling function).
The following settings are possible:
29. In the PV_SCALE parameter group, select the desired engineering unit and the block input
range (measuring range of the density application) for the relevant process variable (see the
following example).
"
Caution!
Make sure that the selected unit is suitable for the measurement variable of the selected
process variable. Otherwise, the BLOCK_ERROR parameter will display the error message
"Block Configuration Error", and the block operating mode cannot be set to AUTO.
Example:
– The measuring range of the density application is 0 to 30 kg/l.
– The output range to the automation system should be 0 to 30 kg/l also.
– The following settings are required:
- Analog Output function block / CHANNEL parameter (output value option),
option 4 = density
- SHED_OPTIONS parameter
→
e.g. Normal Shed Normal Return
- PV_SCALE parameter group
- PV_SCALE 0% = 0
- PV_SCALE 100% = 30
- PV_SCALE UNIT = kg/l
- OUT_SCALE parameter group
- OUT_SCALE 0% = 0
- OUT_SCALE 100% = 30
- OUT_SCALE UNIT = kg/l
30. Set the operating mode in the MODE_BLK parameter group (TARGET parameter) to AUTO.
Process variable
Channel parameter
Density
4
