Siemens Simatic RTU3030C, Руководство по эксплуатации

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Program blocks
5.7 Blocks for analog value functions
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
297
Function Value Status
Quad. mean The square mean is the square root of the
quotient of the sum of the squares of all values
contained in the shift register and their quantity.
0: No value in the shift register
or shift register contains an
invalid value.
1: Function yields a valid value.
Standard devia-
tion
The corrected sample variance of all values
contained in the shift register is formed as
follows:
0: No value in the shift register
or shift register contains an
invalid value.
1: Function yields a valid value.
Parameters
Parameters Tag type / range of
values
Description
Input parameters
En
Enable parameter, see section Often used parameters
(Page 252).
Trigger True / False
Digital input / output /
bit memory
STATUS_ERROR
With an edge transition 0 → 1, the value pending at the
"Input" is included in the shift register. The function pa-
rameters are calculated and the outputs are set.
See above for information on the behavior of the shift
register.
Reset True / False
Digital input / output /
bit memory
STATUS_ERROR
With edge transition 0 → 1, triggered by a digital signal,
the shift register is reset. All values are deleted.
With the "True" setting, the shift register remains perma-
nently empty.
With the "False" setting, the shift register is never reset.
Input Analog input / bit
memory
The analog value pending at the "Input" is entered in the
shift register with an edge transition 0 → 1 of the "Trigger"
input.
Function parameters
Number of values 1 .. 256
Maximum number of values in the shift register. The
number depends on the number of blocks used, see
above.
Function 1 See "Function" in
table above.
Statistical function, the result of which is sent to the "Val-
ue 1" and "Status 1" outputs.
Function 2 See "Function" in
table above.
Statistical function, the result of which is sent to the "Val-
ue 2" and "Status 2" outputs.