1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

Protocol Configuration 591Setting Node AddressesThe best network performance occurs when node addresses are assignedin sequential order. Initiators, such as personal computers, should beassigned the lowest numbered addresses to minimize the time required toinitialize the network. The valid range for the MicroLogix controllers is1…31 (controllers cannot be node 0). The default setting is 1. The nodeaddress is stored in the controller Communications Status file (CS0:5/0…CS0:5/7). Configure the node address via Channel Configuration usingRSLogix 500/RSLogix Micro. Select the Channel 0 tab.Setting Controller Baud RateThe best network performance occurs at the highest baud rate, which is19200. This is the default baud rate for a MicroLogix devices on theDH-485 network. All devices must be at the same baud rate. This rate isstored in the controller Communications Status file (CS0:5/8…CS0:5/15).Configure the baud rate via Channel Configuration using RSLogix 500/RSLogix Micro. Select the Channel 0 tab.Setting Maximum Node AddressOnce you have an established network set up, and are confident that youwill not be adding more devices, you may enhance performance byadjusting the maximum node address of your controllers. It should be setto the highest node address being used.IMPORTANTAll devices should be set to the same maximum node address.MicroLogix 1400 Remote Packet SupportThese controllers can respond and initiate with device’s communications(or commands) that do not originate on the local DH-485 network. This isuseful in installations where communication is needed between theDH-485 and DH+ networks.Publication 1766-RM001A-EN-P - October 2008