
Configuring the Gateway DFNT ♦ ProLinx Gateway
Protocol Manual EtherNet/IP Explicit Messaging Client/Server
Page 36 of 124 ProSoft Technology, Inc.
July 24, 2013
If the module is configured for the serial DF1 half-duplex protocol, the module
can act as a master device routing messages between attached slave devices.
This peer-to-peer communication is defined in the DF1 protocol specification.
The master polls each DF1 slave device until no more data is available from the
device. Response messages from the slaves that have a destination address that
do not match the module are routed with a request message header back out
onto the network. This facility offers communication between the slave devices
for control and data monitoring. This feature is not available if the module is
configured for DF1 full-duplex mode (point-to-point).
The module supports numerous commands. This permits the module to interface
with a wide variety of DF1 protocol devices. This includes PLC2, PLC5, SLC-500
series, MicroLogix and ControlLogix processors. Additionally, other devices
supplied by Rockwell Automation that use the DF1 protocol are supported.
The format of each command in the list depends on the function being executed.
To simplify command construction, the module uses its own set of function codes
to associate a command with a DF1 command/function type. The tables below
list the functions supported by the module:
Basic Command Set Functions
PLC-5 Command Set Functions
Word Range Write
(Binary Address)
Word Range Read
(Binary Address)
Read-Modify-Write
(Binary Address)
Word Range Write
(ASCII Address)
Word Range Read
(ASCII Address)
Read-Modify-Write
(ASCII Address)
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