Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
518 Protocol Configuration
Like DF1 Full-Duplex protocol, DF1 Radio Modem allows any node to
initiate to any other node at any time (if the radio modem network
supports full-duplex data port buffering and radio transmission collision
avoidance). Like DF1 Half-Duplex protocol, up to 255 devices are
supported, with unique addresses from 0 to 254. A node ignores any
packets received that have a destination address other than its own, with
the exception of broadcast packets. A broadcast write command initiated
by any DF1 radio modem node is executed by all of the other DF1 radio
modem nodes that receive it. No acknowledgement or reply is returned.
Unlike either DF1 Full-Duplex or DF1 Half-Duplex protocols, DF1 Radio
Modem protocol does not include ACKs, NAKs, ENQs, or poll packets.
Data integrity is ensured by the CRC checksum.
Using the DF1 Radio Modem
Using RSLogix 500 version 7.00.00 or higher, the DF1 Radio Modem driver
can be configured as the system mode driver for Channel 0 in MicroLogix
1100.
Channel configuration appears as follows. Figure shows Channel 0
configuration.
DF1 Radio Modem Channel 0 Configuration (MicroLogix 1100)
When the system driver is DF1 Radio Modem, the following parameters
can be changed for Channel 0.
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Allen-Bradley MicroLogix 1100 Specifications

General

Brand	Allen-Bradley
Model	MicroLogix 1100
Category	Controller
Language	English