Silo Volume Calculation - Siemens Simatic RTU303xC Series Operating Instructions Manual

Parameters
Alarm
Error
5.8.7

Silo volume calculation

Function
From the fill level the function block calculates the volume depending on the silo geometry.
The length units at the "Fill height" input and at the four dimension function parameters must
be identical. For example, if the fill level is specified in meters (m), the diameters and the two
height outputs must also be specified in meters (m). In this case, the result is output in cubic
meters (m
As an option two limit values can be programmed for a full or empty message.
Parameters
Parameters
Input parameters
En
Fill height
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Tag type / range of
values
Digital output / bit
memory
Digital output / bit
memory
).
3
Tag type / range of
values
Analog input / bit
memory
5.8 Counter and summation blocks
Description
Alarm display
0: Current drainage Q lower than the drainage
•
limit value
1: Current drainage Q equal to or higher than
•
the drainage limit value
You can for example use the Alarm to display flood-
ing (incomplete flow) or other evaluations.
Error display:
0: Block processing completed without errors
•
1: Negative height
•
Description
Enable parameter, see section Often used parame-
ters (Page 252).
The value of the input is included in the calculation
of the fill volume.
The fill height must be between 0 and the sum of
the height of the cylindrical section and the height of
the cone-shaped section of the silo. Otherwise the
Error output is set and the result of the calculation
cannot be used.
Make sure you have the same length unit at the
input and in the function parameters.
Program blocks
309