LEDs on the GFGUA/GFGUB/GFGUG(FG2a) Panel

The physical boards of the GFGUA, GFGUB, and GFGUG are the same. After being loaded with different software, the physical boards perform different functions. These boards have the same types of LEDs on the panels: RUN, ALM, ACT, LINK (for Ethernet port), and ACT (for Ethernet port).

Table 1 describes the LEDs on the GFGUA/GFGUB/GFGUG panel.

**Table 1** LEDs on the board
LED	Color	Status	Meaning
RUN	Green	On for 1s and off for 1s	The board is working.
		On for 0.125s and off for 0.125s	The board is loading data.
		On	There is power input but the board is faulty.
		Off	There is no power input or the board is faulty.
ALM	Red	Off	There is no alarm.
ALM	Red	On or blinking	There is an alarm.
ACT	Green	On	The board works in active mode.
ACT	Green	Off	The board works in standby mode.

Table 2 describes the LEDs of the Ethernet ports on the GFGUA/GFGUB/GFGUG panel.

**Table 2** LEDs of the Ethernet ports
LED	Color	Status	Meaning
LINK	Green	On	The link is connected.
LINK	Green	Off	The link is disconnected.
ACT	Orange	Blinking	Data is being transmitted through the port.
ACT	Orange	Off	No data is being transmitted through the port.