Gateway 312785C important safety instructions Ethernet Communication Troubleshooting

Troubleshooting

Ethernet Communication Troubleshooting

This section is used to troubleshoot the communication between two devices linked via Ethernet.

TIP: For communication troubleshooting, it is strongly advised to create a new Graco Gateway database including only one data tag mapped to a known register in the target device.

PROBLEM	CAUSE	SOLUTION
Values show “----”	Incorrect target device IP address.	Check the target device IP address in
		Graco Gateway (in communications
		on the PLC symbol) to match the tar-
		get device IP address setup.
	Incorrect cable or wrong connection.	Check the LED on the Graco Gate-
		way device Ethernet port. If none are
		lit, there are no connections. Check
		the cable or that the Ethernet port is
		enabled in Graco Gateway, see
		below.
	Ethernet port disabled.	Check that the Ethernet port in Graco
		Gateway is enabled.
	Graco Gateway and target devices
	are in a different address domain:
	• If no routers are present on the	Check that the target device IP
	network.	address and Graco Gateway device
		IP address are different but in the
		same domain. (For example, both
		start with the same three first num-
		bers; ex: 192.168.2.xxx if the mask is
		255.255.255.0).
	• If a router is present on the net-	Check the Graco Gateway device
	work.	Ethernet port Gateway address to
		match the router IP address.
	Incorrect tag mapping.	Check that the tag is mapped to an
		existing register in the target device.
Values blink between the data and	Incorrect tag mapping on one of the	Delete tags one after another and
“----”	tags on the display.	download in-between. When the val-
		ues on the screen stop blinking, the
		last deleted tag was mapped incor-
		rectly or accessed an unknown regis-
		ter in the target device.
	Communications times-out.	Increase the Slave Response or
		Device Timeout on the communica-
		tion port or target device in Graco
		Gateway.

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