Technical data

LED operation mode LatchedAck-F-S
IEC08000397.vsd
R
Y
G
R
Y
G
S
i
g
n
a
l
s
L
E
D
Ack
= Steady = FlashIllumination =>
IEC08000397 V1 EN
Figure 47: 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 47 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.
IEC08000398.vsd
= Steady = FlashIllumination =>
R
Y
G
R
Y
G
S
i
g
n
a
l
s
L
E
D
Ack
IEC08000398 V1 EN
Figure 48: LHMI LED operation mode LatchedAck-F-S Ack Prio / 1
When more than one color is used the rules for priority are valid. Two basic principles
are:
• Two or more signals are still ON when the LED is acknowledged.
Section 6 1MRK 511 261-UUS A
Local HMI engineering
80 650 series ANSI
Engineering Manual