ABB RELION 650 SERIES, Technical Manual

Page: 83 / 942

• LEDs that are used in the collecting mode of operation are accumulated
continuously until the unit is acknowledged manually. This mode is suitable
when the LEDs are used as a simplified alarm system. When all three inputs
(red, yellow and green) are connected to different sources of events for the
same function block, collecting mode shows the highest priority LED color
that was activated since the latest acknowledgment was made. If a number of
different indications were made since the latest acknowledgment, it is not
possible to get a clear view of what triggered the latest event without looking
at the sequence of events list. A condition for getting the sequence of events is
that the signals have been engineered in the disturbance recorder.
Re-starting mode
• In the re-starting mode of operation each new start resets all previous active
LEDs and activates only those which appear during one disturbance. Only
LEDs defined for re-starting mode with the latched sequence type 6
(LatchedReset-S) will initiate a reset and a restart at a new disturbance. A
disturbance is defined to end a settable time after the reset of the activated
input signals or when the maximum time limit has elapsed. In sequence 6, the
restarting or reset mode means that upon occurrence of any new event, all
previous indications will be reset. This facilitates that only the LED
indications related to the latest event is shown.
Acknowledgment/reset
GUID-E6727E8F-C28B-4295-AE21-BC5643363805 v3
• From local HMI
•
The active LED indications can be acknowledged/reset manually.
Manual acknowledgment and manual reset have the same meaning and
is a common signal for all the operating sequences and LEDs. The
function is positive edge triggered, not level triggered. The
acknowledgment/reset is performed via the
button and menus on the
LHMI.
• From function input
•
The active LED indications can also be acknowledged/reset via an input,
CLRLEDS
, to the function block LHMICTRL. This input can for
example be configured to a binary input operated from an external push
button or a function button. The function is positive edge triggered, not
level triggered. This means that even if the button is continuously
pressed, the acknowledgment/reset only affects indications active at the
moment when the button is first pressed.
• Automatic reset
•
The automatic reset can only be performed for LED indications defined
for re-starting mode with the latched sequence type 6 (LatchedReset-S).
1MRK 506 382-UEN A
Section 5
Local Human-Machine-Interface LHMI
Line distance protection REL650 2.2 IEC 77
Technical manual