Function Block; Output Signals; Setting Parameters - ABB Relion 670 Series Technical Reference Manual

Section 4
Basic IED functions
4.2.3
4.2.4
4.2.5
62
The technique to split the analog input signal into two A/D converters with
different amplification makes it possible to supervise the incoming signals under
normal conditions where the signals from the two converters should be identical.
An alarm is given if the signals are out of the boundaries. Another benefit is that it
improves the dynamic performance of the A/D conversion.
The self-supervision of the A/D conversion is controlled by the ADx_Controller
function. One of the tasks for the controller is to perform a validation of the input
signals. This is done in a validation filter which has mainly two objects: First is the
validation part that checks that the A/D conversion seems to work as expected.
Secondly, the filter chooses which of the two signals that shall be sent to the CPU,
that is the signal that has the most suitable level, the ADx_LO or the 16 times
higherADx_HI.
When the signal is within measurable limits on both channels, a direct comparison
of the two channels can be performed. If the validation fails, the CPU will be
informed and an alarm will be given.
The ADx_Controller also supervise other parts of the A/D converter.

Function block

IEC09000787 V1 EN
Figure 27: INTERRSIG function block

Output signals

Table 13: INTERRSIG Output signals
Name Type
FAIL BOOLEAN
WARNING BOOLEAN
CPUFAIL BOOLEAN
CPUWARN BOOLEAN

Setting parameters

The function does not have any parameters available in the local HMI or PCM600.
1MRK 505 208-UEN B
Description
Internal fail
Internal warning
CPU fail
CPU warning
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