ABB 650 series, Engineering Manual

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Monitoring a signal with a LED is a simple mode, where the LED follows the
signal state. More than one signal per LED can be used when applicable. See
Figure 46 for the valid priority rules. The LED illuminates always in steady state.
LED operation mode Follow-F
IEC08000396.vsd
= Steady = Flash Illumination =>
R
Y
G
R
Y
G
S
ig
na
ls
LE
D
IEC08000396 V1 EN
Figure 47: LHMI: LED operation mode Follow-F
This is the same mode as Follow-S but the LED illuminates flashing, see Figure 47 .
This mode may be used to indicate that a tap changer or Petersen coil is moving.
LED operation mode LatchedAck-F-S
IEC08000397.vsd
R
Y
G
R
Y
G
S
ig
na
ls
LE
D
Ack
= Steady = Flash Illumination =>
IEC08000397 V1 EN
Figure 48: LHMI: LED operation mode LatchedAck-F-S / Base
The classical mode to indicate incoming alarms or warnings, which the operator
has not seen since the last acknowledgement, is presented in
Figure 48 as a basic
operation mode. Two possibilities for the operator to acknowledge:
• The signal is already gone when acknowledged, the LED turns OFF (at least
for this color).
• The signal is still ON , the LED stays illuminated and changes to steady state.
1MRK 511 261-UEN -
Section 6
Local HMI engineering
650 series 69
Engineering Manual