4.3. Fieldbus Module Status Check (CC-Link)

CC-Link Fieldbus module has 4 LEDs installed

Table 4‑3 Operating Status by CC-Link Fieldbus Module LED					( : ON : OFF : Flash)
RUN	ERR	SD	RD	Operating status
				Normal communication, but CRC error is frequently detected due to noise.
	0.4s			Station number or speed setting has changed when reset.
				No response due to CRC error in receiving data.
				Normal communication
				No host data.
				Responding to falling signal, but CRC error in refreshed reception
				CRC error in host data
				Link start not executed.
				No host data or cannot be received due to noise
				Cannot be received due to disconnection etc... Power turned Off or H/W setting
			,	Speed or station number setting error

4.3. Fieldbus Module Status Check (CC-Link)​