Select the Operating Mode. National Instruments 320727B-01, NI-488.2TM

Chapter 2 Hardware Configuration and Installation

Select the Operating Mode

Switch 8 selects the Extended Factory Test mode and should remain OFF for normal operating mode. When this switch is ON, the GPIB-ENET performs extended tests which require special connections to the GPIB and Ethernet ports. Without these connections, the GPIB-ENET cannot pass the extended factory tests.

Switch 7 selects the Update EEPROM mode and should remain OFF for normal operating mode. The firmware controlling the GPIB-ENET is stored in an electrically erasable memory. When this switch is ON, you can reprogram the firmware memory from the Ethernet network using the Update utility. Refer to Appendix B, Utilities, for more information.

Select the Method for Configuring the IP Address

Switch 6 indicates how the GPIB-ENET is configured with its IP address when it is powered on. When you first install a GPIB-ENET in a network, or if the IP address changes, this switch should be OFF, indicating that the IP address needs to be configured.

When Switch 6 is OFF, the method of configuring the IP address depends on Switch 5.

Once the GPIB-ENET receives its IP address, it stores the address in nonvolatile memory. After the IP address is stored, place Switch 6 ON so the GPIB-ENET refers to the stored IP address and does not wait to be configured with an IP address each time it is powered on.

Switch 5 selects the method by which IP addresses are configured in the GPIB-ENET.

When Switch 5 is OFF, the GPIB-ENET issues RARP requests each time it is powered on. The GPIB-ENET continues to issue RARP requests until a valid RARP reply is received. If Switch 5 is ON, the GPIB-ENET does not issue RARP requests. Instead, you must use the IPassign utility to configure the IP address in the GPIB-ENET. In most networks, the GPIB-ENET can use RARP to have its address dynamically configured; however, there are some networks which, for security or other reasons, do not use RARP. In this case, you must use IPassign . Refer to Appendix B, Utilities, for more information on IPassign . If Switch 6 is ON, the setting of Switch 5 is irrelevant.

Set the Ethernet Port Configuration

In addition to a 15-pin AUI connector, your GPIB-ENET has either a 10Base-T Ethernet connector or a coax Ethernet connector. Use the slide switch to select the Ethernet port the GPIB-ENET uses. Depending on which version you have, National Instruments configures the GPIB-ENET to use either the 10Base-T port or the coax port for data transmissions, as shown in Figure 2-2.

© National Instruments Corp.

2-3 GPIB-ENET for Macintosh