ABB REO 517 Applications Manual page 305

LED indication function (HL, HLED)
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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 been elapsed.
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The active 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 C-button on the Local HMI according to the
sequence in figure 162.
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