Using the CFG RESET Switch

The Configuration Reset (CFG RESET) switch is a recessed switch beside the Ethernet (ENET) connector on the rear panel. Refer to Rear Panel of a Four-Port Serial ENET Interface for an illustration of its location.

This switch performs two functions, depending on whether you press it at power-on or during operation.

Using the CFG RESET Switch during Operation

While the serial ENET interface is operational, as indicated by a steady yellow PWR/RDY LED, you can use the CFG RESET switch to place the box into network configuration mode.

This special mode ensures that network parameters are not changed while in normal operation mode. Because you cannot change the network parameters unless you deliberately place the serial ENET interface into network configuration mode, the parameters are protected while in normal operation. Hosts cannot connect to the serial ENET interface while it is in network configuration mode.

Note  Pressing the CFG RESET switch has no effect if hosts are currently connected.

Close all connections, then press and hold the CFG RESET switch and wait approximately three seconds until the PWR/RDY LED becomes solid red. If you release the switch prior to three seconds, the serial ENET interface continues to operate normally.

The PWR/RDY LED goes through the following changes during these three seconds:

1. The LED begins slowly alternating between red and yellow.
2. The alternating pattern increases in tempo.
3. At three seconds, the PWR/RDY LED becomes steady red. This indicates the serial ENET interface is ready to enter network configuration mode.
4. Now release the CFG RESET switch. The PWR/RDY LED alternates rapidly between red and yellow to indicate the serial ENET interface is now in network configuration mode.

This mode remains in effect until you switch off the serial ENET interface or you use the NI Ethernet Device Configuration utility to change its network characteristics.

Using the CFG RESET Switch at Power-On

In the event you forget the network configuration that a particular serial ENET interface is using, you can reset the unit to its default network characteristics. By pressing and holding the CFG RESET switch while you power on the serial ENET interface, the network parameters revert to the default settings as defined on the baseplate label.

You must press and hold the switch for approximately three seconds until the PWR/RDY LED becomes solid red. If you release the switch prior to three seconds, no change occurs to the network configuration, and the serial ENET interface continues to boot normally.

The PWR/RDY LED goes through the following changes during these three seconds:

1. The LED begins slowly alternating between red and yellow.
2. The alternating pattern increases in tempo.
3. At three seconds, the PWR/RDY LED becomes steady red. This indicates the network configuration will be set to the factory default settings.
4. When you release the CFG RESET switch, the box continues to boot as normal, and the PWR/RDY LED indicates the boot process as described in ENET LED Descriptions.