Siemens Simatic RTU303xC Series Operating Instructions Manual page 308

Program blocks
5.8 Counter and summation blocks
Parameters
Reset
Function parameters
Width (b)
Flow coefficient (µ)
Gravitational accelera-
tion (g)
Limit value
Retentivity
Output parameters
Drainage (Q)
Flow volume
308
Tag type / range of Description
values
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.
ON / OFF If this option is enabled, the count value is saved in
the retentive memory. The last value therefore
continues to be used when the configuration is
changed or a restart of the module takes place.
If the option is disabled, the counter is reset to 0 or
the initial value when the configuration is changed
or a restart of the module takes place.
For more information, refer to the section Often
used parameters (Page 252).
Analog memory bit Tag in which the current drainage (m
configured as a float- by the block is output.
ing-point number:
3.402823e-38 ..
3.402823e+38
Analog memory bit Calculated added flow volume (m
configured as a float- reset.
ing-point number:
3.402823e+38
Operating Instructions, 06/2019, C79000-G8976-C382-06
]
2
/s
3
/s) calculated
3
) since the last
3
RTU303xC