Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
Protocol Configuration 607
user-configured Store & Forward Table to indicate which received packets
it should re-broadcast, based on the packet’s source and destination
addresses.
Configuring the Store & Forward Table
The Store & Forward Table can be configured to use any valid binary data
table file (B3, B9…B255) of length 16 words. Each bit in the file
corresponds to a DF1 Radio Modem node address. In order to configure a
MicroLogix to Store & Forward message packets between two other
nodes, the bits corresponding to the addresses of those two other nodes
must be set. For instance, if node 2 is used to Store & Forward message
packets between nodes 1 and 3, then both bits Bx/1 and Bx/3 (where x is
the configured data table file number) would have to be set in the Store &
Forward Table file (see Figure ). You can set bit 255 to enable Store &
Forward of broadcast packets, as well.
IMPORTANT
Once Store & Forward is enabled, duplicate packet detection is also
automatically enabled. Whenever Store & Forward is used within a radio
modem network, every node should have a Store & Forward Table file
configured, even if all of the bits in the file are cleared, so that duplicate
packets will be ignored.
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes