2

Configuring Full-Duplex Operation

Before setting the module to Full-Duplex operation, be certain that it is connected directly to a managed hub or switch that is manually configured for full-duplex operation on the port connected to the IC693CMM321.

The default setting for the module is Half-Duplex. The Full Duplex parameter is an “advanced user parameter” that can only be changed by using the CHPARM (Change Parameter) command in the Station Manager softwar. Refer to GFK-1186, the TCP/IP Ethernet Communications Station Manager Manual, for additional information on using Station Manager.

Warning

Contrary to the recommendation of IEEE Std. 802.3, this Ethernet Interface module does NOT support autonegotiation of half/full-duplex. Attempting full- duplex operation of this interface with a repeater or half-duplex network (including auto-negotiating hubs and switches) can cause severe network performance degradation, increased collisions, late collisions, CRC errors, and undetected data corruption.

If the module is configured in the Full-Duplex mode (see above), you can change it back to its default value of Half-Duplex by using the Station Manager CHPARM command.

GFK-1541B

Chapter 2 Installation

2-11

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Image 24
GE GFK-1541B manual Configuring Full-Duplex Operation