the VALID output of the SPLIT_SPS building block with the data value of the input signal (AND gate). This way,
you can set the value to a non-risk state with the valid input signals. In the example, the output of the CFC
chart is set to the value
FALSE
when the input signal is invalid.
Quality Processing/Affected by the User in Internal Device Functions
Figure 3-34 provides an overview for processing the quality of data objects within a device-internal function.
A function can receive internal data or input data that is routable by the user (binary input signal or double
commands). The respective quality attributes supported are evaluated by the function on the input side. The
attributes are not passed through the specific algorithm/the specific logic of the function. The output data are
supplied with a quality that is specified by the function state and device-operating mode.
NOTE
Take into account that pickup of chatter blocking (see chapter 3.8.1 Signal Filtering and Chatter Blocking
for Input Signals) sets the corresponding Validity attribute to
invalid
.
[loquali3-100611-01.tif, 2, en_US]
Figure 3-34
Overview for Processing Quality within an Internal Function
Internal Input Data
The quality processing is automatic for internal input data.
Supported Quality Attributes
Description
Validity
•
At the receiving end, internal values can only be
invalid
or
good
.
•
If
invalid
, the function health is set to Alarm and the
function is reset.
Causes for invalid internal data are, for example:
•
The frequency operating range of the device was left.
•
The device is not calibrated.
•
The A/D converter monitoring identified an error.
3.3.4
System Functions
3.3 Processing Quality Attributes
SIPROTEC 5, High-Voltage Bay Controller, Manual 87
C53000-G5040-C015-9, Edition 11.2017
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