LED operation mode Follow-F
This is the same mode as Follow-S but the LED illuminates flashing, see
This mode may be used to indicate that a tap changer or Petersen coil is moving.
LED operation mode LatchedAck-F-S
This sequence has a latched function and works in collecting mode. Every LED is
independent of the other LEDs in its operation. At the activation of the input signal,
the indication starts flashing. After acknowledgment the indication disappears if
the signal is not present any more. If the signal is still present after
acknowledgment it gets a steady light.
Activating
signal
LED
Acknow.
en01000231.vsd
IED500-IEC01000231 V1 EN
Figure 42:
Operating sequence 3 (LatchedAck-F-S)
LED operation mode LatchedAck-S-F
This operation mode operates exactly as the one described above (LatchedAck-F-
S). The only difference is that the illumination mode is changed. Flash mode
instead of steady mode and steady mode instead of flash mode.
LED operation mode LatchedColl-S
IEC01000235_2_en.vsd
Activating
signal
LED
Reset
IEC01000235 V2 EN
Figure 43:
LHMI: LED operation mode LatchedColl-S
This mode catches a signal change to
ON
and the LED stays
ON
until the operator
resets the LEDs for this group.
1MRK511240-UEN B
Section 6
Local HMI engineering
670 series
59
Engineering Manual
