Siemens Simatic RTU3030C, Руководство по эксплуатации

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Program blocks
5.7 Blocks for analog value functions
RTU303xC
280
Operating Instructions, 06/2019, C79000-G8976-C382-06
Parameters Tag type / range of
values
Description
Input Analog input / bit
memory
Event counter / usage
meter
The current value of the input parameter is processed by
the block as described above.
Output parameters
Output
Analog memory bit
•
Configured as a
floating-point
number:
±3.402823 e-38 ..
±3.402823 e+38
•
Configured as a
counter:
0 .. 4294967295
Tag in which the value calculated by the block is output.
Error Digital output / bit
memory
Error display:
• 0: Block processing completed without errors
•
1: Block processing aborted with an error
For the meaning, see Often used parameters
(Page 252).
5.7.2 Analog value monitoring
Function
The analog value of the input is monitored for positive and negative change when the
"Trigger" input is activated.
The values for a positive change (Δ+) and a negative change (Δ -) can be programmed.
When the "Trigger" input is set, the current value of the input (A
Trg
) is saved and the block
processing started. As soon as the value of the analog input has reached the value of the
negative change (A
Trg
+ Δ -) or the value of the positive change (A
Trg
+ Δ+) the output is set to
1.
As soon as the value of the analog input is once again between the values A
Trg
+ Δ - and
A
Trg
+ Δ+ the output is set to 0 again.
Parameters
Parameters Tag type / range of
values
Description
Input parameters
En
Enable parameter, see section Often used parameters
(Page 252).