Device functions Proline Promag 55 FOUNDATION Fieldbus
5 Analog Input function block
Hauser
115
5.2.4
Selection of units
The XD_SCALE parameter group is used to determine with which physical unit the input value
from the Transducer Blocks should be read in and processed in the Analog Input function block.
The output value OUT is determined via the OUT_SCALE parameter group
→
For an example for
rescaling the input value, see Page 116.
The choice of units depends on the corresponding channel:
• Channel = 1
→
Only units for the mass flow are valid
• Channel = 2
→
Only units for the Volume Flow are valid
• Channel = 7
→
Only units for Totalizer 1 are valid
• Channel = 8
→
Only units for Totalizer 2 are valid
• Channel = 9
→
Only units for Totalizer 3 are valid
If an unsuitable unit is selected, the function block changes to the OOS (out of service) operating
mode.
!
Note!
• If the "Direct" type of linearization is selected via the L_TYPE parameter, the setting for the
XD_SCALE and OUT_SCALE parameter groups must be identical; otherwise, the function block
remains in the OOS mode and the "BLOCK CONFIG ERROR" block error is displayed in the
BLOCK_ERROR parameter.
• The system units selected in the Transducer Blocks in question do not have any effect on the
setting of the system units in the Analog Input function block. The units are specified
independently of one another and must be configured separately. The unit selected in the
Transducer Blocks is only used for the local display, EPD adjustment, low flow cut off and for
simulation.
5.2.5
Status of the output value OUT
The status of the parameter group OUT communicates to the downstream function blocks the status
of the Analog Input function block and the validity of the output value OUT. The following status
values can be displayed:
• GOOD_NON_CASCADE
The output value OUT is valid and can be used for further processing.
• UNCERTAIN
The output value OUT can only be used for further processing to a limited extent. The status
signals to the downstream function blocks that a "notice message" is present in the device, e.g.
arising from active positive zero return or simulation.
• BAD
The output value OUT is invalid. The following causes are possible:
– The Analog Input function block is in the OOS operating mode.
– The Resource Block is in
operating mode OOS.
– The status "BLOCK CONFIG ERROR" is displayed via the BLOCK_ERR parameter.
– The "Flow" or "Totalizer" Transducer Block is in the OOS operating mode. The Analog Input
function block can only process the input value of the Transducer Block in question if the
operating mode is set to AUTO.
– A "fault message" is present in the device arising from a critical device error, e.g. an electronics
module defect.
!
Note!
In the "Diagnosis" Transducer Block, the cause of the error message (notice/fault message) is
displayed via the "Diag. - Act. Sys. Condition" parameter. A list of all the error messages, including
remedial measures, is provided in the Operating Instructions for Proline Promag 55 FOUNDATION
Fieldbus (BA126D).
