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Note:
➢ As signals concentrating error and/or alarm is not used, the validity of U16_00
signal will not be affected by the occurrences of severe errors except the errors
and failures of analog data. Thus, that attribute is keeping ‘good (i.e., it is
0000000000000)’ if those errors occur.
➢ The states of ‘questionable’ and ‘invalid’ are exclusive in the U16_00. That is,
‘invalid’ state overcomes when ‘questionable’ also happens (i.e., the ‘questionable’
is not presence when the ‘invalid’ and the ‘questionable’ are happening together.
➢ The value of U16_00 validity is influenced by [CHK_xxx:Lvl] settings. That is, the
value will be changed after another item is set for the [CHK_xxx:Lvl].
➢ Table 11.3-7 shows the combination cases of validity and detail quality.
Table 11.3-7 Combinations of validity and detail quality (U16_00)
‘questionable’ and ‘failure’ are not
allowed to select together in the
IEC61850.
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