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

606 Protocol ConfigurationDF1 Radio Modem Channel 0 Configuration ParametersParameter Options ProgrammingSoftwareDefaultChannel Channel 0 0DriverDF1 Radio ModemBaud Rate 300, 600, 1200, 2400, 4800, 9600, 19.2K, 38.4K 19.2KParity none, even noneNode Address 0…254 decimal (255 is reserved for broadcast) 1Store and ForwardFile NumberStore and Forward allows messages between two out-of-radio-range nodes to be routed throughone or more in-radio-range nodes. This is the data table file number used for the Store & ForwardTable.Control Line No Handshaking, Half-Duplex Modem (RTS/CTS Handshaking) NoHandshakingError Detection CRC, BCC CRCPre Transmit Delay(x1 ms)0…65535 (can be set in 1 ms increments)When the Control Line is set to “No Handshaking”, this is the delay time before transmission.Required for 1761-NET-AIC physical Half-Duplex networks. The 1761-NET-AIC needs 2 ms of delaytime to change from transmit to receive mode.When the Control Line is set to “Half-Duplex Modem (RTS/CTS Handshaking)”, this is theminimum time delay between receiving the last character of a packet and the next RTS assertion.01The DF1 Radio Modem driver can be used in a “pseudo” Master/Slavemode with any radio modems, as long as the designated “Master” node isthe only node initiating MSG instructions, and as long as only one MSGinstruction is triggered at a time.For modern serial radio modems that support full-duplex data portbuffering and radio transmission collision avoidance, the DF1 RadioModem driver can be used to set up a “Masterless” peer-to-peer radionetwork, where any node can initiate communications to any other nodeat any time, as long as all of the nodes are within radio range so that theyreceive each other’s transmissions.Using Store & Forward CapabilityDF1 Radio Modem also supports Store & Forward capability in order toforward packets between nodes that are outside of radio range of eachother. Each node that is enabled for Store & Forward has aPublication 1766-RM001A-EN-P - October 2008