ABB RELION 650 SERIES, Engineering Manual, Page: 66 / 110

LED operation mode LatchedColl-S
IEC08000402.vsd
= Steady = Flash Illumination =>
R
Y
G
R
Y
G
S
ig
na
ls
LE
D
Reset LED
IEC08000402 V1 EN-US
Figure 51: 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.
If the signal is still ON when a reset LED is done, the LED will illuminate again. This occurs when
the application configuration accesses the signal again in the next cycle after reset. The thin
dashed lines in Figure 51 shows the internal state of the LED following the signal and reset,
when no higher prior signal is given.
The LED illuminates always in steady mode.
LED operation mode LatchedReset-S
IEC08000400.vsd
= Steady = Flash Illumination =>
Man-
Reset
S1
S2
S3
S4
tMax
tRestart
S1LED
S2LED
S3LED
S4LED
Auto-
Reset
IEC08000400 V1 EN-US
Figure 52: LHMI: LED operation mode LatchedReset-S
This mode is useful to monitor signals that are involved in case of a disturbance, see Figure 52 .
The signal state after the disturbance allows a fast overview about the disturbance. To get
always the situation of the last occurred disturbance, the LEDs are reset after a predefined
time (tReset). So this is the longest time a disturbance can be monitored by the LED situation.
In case a second disturbance occurs before the tReset time has elapsed, see Figure 53 , the
signals that are still ON at the end of tReset will return to ON with the next application
configuration cycle after tReset. To clear these LEDs, a second timer tMax is used. TMax is
Section 6 1MRK 511 284-UEN B
Local HMI engineering
60 650 series
Engineering manual
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