IEC09000656 V1 EN-US
Figure 49: LHMI: Function key operation mode
The LEDs have a number of different operation modes, see Figure 50:
• General definitions
• Each LED can illuminate in one of three colors: RED, YELLOW,
GREEN.
• Only one color is illuminated at a time.
• The priority for illumination and the color is linked.
• Prio 1 = RED
• Prio 2 = YELLOW
• Prio 3 = GREEN
• When RED and YELLOW are ON at the same time, the LED will
illuminate in RED.
• The operator's acknowledgement for the LED signals is done for all three
signals (RED, YELLOW, GREEN) of the LED.
• A reset of the LEDs operates also on all three signals of the LEDs.
• Follow-S
• The LED illumination follows the status of the signal. The LED
illuminates steady (S).
• Follow-F
• The LED illumination follows the status of the signal. The LED
illuminates flashing (F).
• LatchedAck-F-S
• The LED latches the signal change OFF-ON and flashes (F) until it is
acknowledged.
• When the signal is still ON at the time the signal is acknowledged, the
LED changes to steady (S) mode.
• When the signal has already changed to OFF before the time it is
acknowledged, the LED turns to OFF.
• LatchedAck-S-F
1MRK 511 398-UEN C Section 7
Local HMI engineering
670 series 2.2 IEC 87
Engineering manual
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