Rockwell Automation 1785-ENET PLC-5 Ethernet Interface Module Installation Instructions - Manual (Page 8)

8 PLC-5 Ethernet Interface Module
Publication 1785-IN019B-EN-P - January 2007
When you create a hostname, consider these naming conventions.
• The hostname can be a text string up to 24 characters.
• The hostname can contain alphanumeric (A through Z, 0...9) and may contain a
period and minus sign.
• The first character must be an alpha character.
• The last character must not be a minus sign.
• You cannot use blank spaces or space characters.
• The hostname is not case-sensitive.
Auto Negotiate Speed and Duplex Selection
In the Edit Channel 3A properties dialog, you can either leave the Auto Negotiate checkbox
checked, which lets the controller negotiate a speed and duplex port setting, or you can
uncheck the Auto Negotiate checkbox, which forces the port setting to a particular speed and
duplex port setting.
If you uncheck the Auto Negotiate checkbox, the port setting lets you select the range of
speed and duplex settings that the controller negotiates. The default port setting with Auto
Negotiate checked is 10/100 Mbps half duplex, which lets the controller negotiate any of its
four available settings.
The following table lists the order the controller negotiates for each setting.
Set Negotiation Order
Setting 100 Mbps
Full Duplex 100 Mbps
Half Duplex 10 Mbps
Full Duplex 10 Mbps
Half Duplex
10/100 Mbps Full
Duplex/Half Duplex 1st 2nd 3rd 4th
100 Mbps Full Duplex or
100 Mbps Half Duplex 1st 2nd 3rd
100 Mbps Full Duplex or
10 Mbps Full Duplex 1st 2nd 3rd
100 Mbps Half Duplex or
10 Mbps Full Duplex 1st 2nd 3rd
100 Mbps Full Duplex 1st 2nd
100 Mbps Half Duplex 1st 2nd
10 Mbps Full Duplex 1st 2nd
10 Mbps Half Duplex Only 1st