Rockwell Automation Publication 2080-UM002M-EN-E - April 2022 325
Appendix G
Connect to Networks using DF1
The following protocols are supported on the embedded serial port, including
any 2080-SERIALISOL plug-in module that is installed, on the newer Micro850
(2080-L50E) and Micro870 (2080-L70E) controllers.
• DF1 Full Duplex
• DF1 Half-Duplex Master/Slave
• DF1 Radio Modem
DF1 Full-Duplex Protocol DF1 Full-Duplex protocol provides a point-to-point connection between two
devices. DF1 Full-Duplex protocol combines data transparency (American
National Standards Institute ANSI – X3.28-1976 specification subcategory D1)
and 2-way simultaneous transmission with embedded responses
(subcategory F1).
The controller supports the DF1 Full-Duplex protocol via RS-232 connection to
external devices, such as computers, or other controllers that support DF1 Full-
Duplex.
DF1 support is achieved through the CIP serial interface in the Micro800
controllers.
DF1 Full-Duplex protocol (also referred to as DF1 point-to-point protocol) is
useful where RS-232 point-to-point communication is required. DF1 protocol
controls message flow, detects and signals errors, and retries if errors are
detected.
IMPORTANT This appendix only applies to Micro850 (2080-L50E) and Micro870
(2080-L70E) controllers.
Topic Page
DF1 Full-Duplex Protocol 325
DF1 Half-Duplex Protocol 326
Modem Control Line Operation 328
Configure DF1 Half-Duplex Parameters 330
Configure a Standard-Mode DF1 Half-Duplex Master Station 330
Configure a Message-based Mode DF1 Half-Duplex Master
Station
334
Configure a Slave Station 336
Configure Poll Timeout 337
Configure a Radio Modem Station 338
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