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| Comm Status | Device
Data | Yellow LED flashes each time a packet is sent on the EIA-485 network. If this LED is not blinking, the gateway is not attempting to communicate with any Modbus device. Check configuration. |
Device
Status | Green/Red LED flashes green when a good packet is received in response to a query when operating as Master, or when a good reply is sent when operating as Slave. Flashes red in response to an error in the reply when operating as Master, or in query when operating as Slave. |
| Ethernet | Activity | Green LED is on solid during portions of the boot-up process, and then flashes briefly when Ethernet network traffic is detected. |
| Link | Yellow LED indicates an Ethernet link is present. This indicator will light if a link is present regardless of processor or network activity. If not lit, check network wiring. |
| Power
| Status | Blue LED (internal) on any time power is present and internal power supply is functioning. |
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| Line Bias | Line Bias should be enabled only one place on the network. The "Master" position has line bias turned on, and "Slave" position has bias turned off. There is no correlation with master/slave functionality. There is simply only one master on the link and multiple slaves, and bias should only be enabled in one location. It is simply easier to remember selecting bias only on the master. |
| Line Termination | Install shunt block in the termination position when this gateway is physically located at the end of the EIA-485 link. It is shipped with termination enabled by default, which is the most commonly used choice with the gateway as master and physically located at one end of the link. |
| Init Jumper | Placing the init jumper after bootup will restore default IP address (10.0.0.101) and root password. Placing the init jumper before power-up will invoke the TFTP image boot loader. |
