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Programming
5.8 Counter and summation blocks
Enter the gravitational acceleration g for your location. For central Europe the value is
approximately 9.81. On the Internet you will find tables and programs for specifying g for
many places.
Parameters
Parameters
Input parameters
En
Height (h)
Reset
Function parameters
Width (b)
Flow coefficient (µ)
Gravitational accelera-
tion (g)
Limit value
Output parameters
Drainage (Q)
238
Tag type / range of
Description
values
Enable parameter, see section Often used parame-
ters (Page 198).
Analog input / bit
Measured height in meters [m]
memory
With a negative value the output "Error" is set to 1.
True / False
When there is an edge change 0 → 1 the flow add-
ed together up to now is reset to 0. As long as "Re-
Digital input / out-
•
set" is set to 1, the added flow remains = 0.
put / bit memory
When there is an edge change 1 → 0, the adding is
STATUS_ERROR
•
started and the time of the current update cycle is
taken as the start time for the calculation in the next
cycle.
The input has no influence on "Drainage (Q)".
If "True" is set permanently the addition is turned
off.
If "False" is set permanently the added up amount
of flow is never reset. The addition begins with the
first update cycle of the RTU.
0 .. 10000
Flow width in meters [m]
Display of max. 4
decimal places.
0.0000 .. 0.9999
Flow coefficient depending on the crest shape
Display of max. 4
decimal places.
9.0000 .. 9.9999
Effective gravitational acceleration [m/s
Display of max. 4
decimal places.
0 .. 3.402823e+38
Drainage limit value (high) in m
Max. 19 characters,
If the limit value is exceeded the output "Alarm" is
display of max. 4
set to 1.
decimal places
As soon as the limit value is undershot the output
"Alarm" is set to 0.
Analog memory bit
Tag to which the current drainage (m
configured as a float-
by the block is output.
ing-point number:
3.402823e-38 ..
3.402823e+38
Operating Instructions, 09/2017, C79000-G8976-C382-04
]
2
/h
3
/h) calculated
3
RTU3030C
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