Technical data

LED operation mode Follow-S
IEC08000395.vsd
= Steady = FlashIllumination =>
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IEC08000395 V1 EN
Figure 45: LHMI: LED operation mode Follow-S
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 45 for
the valid priority rules. The LED illuminates always in steady state.
LED operation mode Follow-F
IEC08000396.vsd
= Steady = FlashIllumination =>
R
Y
G
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IEC08000396 V1 EN
Figure 46: LHMI: LED operation mode Follow-F
This is the same mode as Follow-S but the LED illuminates flashing, see Figure 46.
This mode may be used to indicate that a tap changer or Petersen coil is moving.
1MRK 511 261-UUS A Section 6
Local HMI engineering
650 series ANSI 79
Engineering Manual