Principle Of Operation; Reporting; Design - ABB Relion 670 Series Technical Reference Manual

Section 13
Monitoring
13.2.2
13.2.2.1
13.2.2.2
494

Principle of operation

Event counter (CNTGGIO) has six counter inputs. CNTGGIO stores how many
times each of the inputs has been activated. The counter memory for each of the six
inputs is updated, giving the total number of times the input has been activated, as
soon as an input is activated. The maximum count up speed is 10 pulses per
second. The maximum counter value is 10 000. For counts above 10 000 the
counter will stop at 10 000 and no restart will take place.
To not risk that the flash memory is worn out due to too many writings, a
mechanism for limiting the number of writings per time period is included in the
product. This however gives as a result that it can take long time, up to several
minutes, before a new value is stored in the flash memory. And if a new
CNTGGIO value is not stored before auxiliary power interruption, it will be lost.
CNTGGIO stored values in flash memory will however not be lost at an auxiliary
power interruption.
The function block also has an input BLOCK. At activation of this input all six
counters are blocked. The input can for example, be used for blocking the counters
at testing.The function block has an input RESET. At activation of this input all six
counters are set to 0.
All inputs are configured via PCM600.

Reporting

The content of the counters can be read in the local HMI.
Reset of counters can be performed in the local HMI and a binary input.
Reading of content can also be performed remotely, for example from a IEC 61850
client. The value can also be presented as a measuring value on the local HMI
graphical display.

Design

The function block has six inputs for increasing the counter values for each of the
six counters respectively. The content of the counters are stepped one step for each
positive edge of the input respectively.
The function block also has an input BLOCK. At activation of this input all six
counters are blocked and are not updated. Valid number is held.
The function block has an input RESET. At activation of this input all six counters
are set to 0.
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Technical reference manual