DF-1 Protocol

DF-1 / DF1 protocol is an asynchronous byte-oriented protocol that is used to communicate with most Allen Bradley RS232 interface modules. DF1 protocol consists of link layer and application layer formats. DF1 works over half duplex and full duplex modes of communication.

## Application layer messages

Application layer message format consists of Command Initiator messages (request messages) and Command Executor (reply messages). Important command initiator messages are as follows.

* apply port configuration
* bit write
* change mode
* close file
* diagnostic status
* disable forces
* disable outputs
* download request
* echo
* enable outputs
* enable PLC scanning
* enter download mode
* enter upload mode
* exit download/upload mode
* file read
* file write
* get edit resource
* initialize memory
* modify PLC-2 compatibility file
* open file
* physical read
* physical write
* read bytes physical
* read diagnostic counters
* reset diagnostic counters
* read link parameters
* read-modify-write
* read section size
* restart request
* set CPU mode
* set data table size
* set ENQs
* set link parameters
* set NAKs
* set timeout
* set variables
* shutdown

## See also

* Computer networking
* Computer science

## External links

* DF1 Protocol Reference Manual
* DF1 protocol Open Source

* v
* t
* e

Automation protocols

Process automation|

* AS-i
* BSAP
* CC-Link Industrial Networks
* CIP
* CAN bus
* CANopen
* DeviceNet
* ControlNet
* DF-1
* DirectNET
* EtherCAT
* Ethernet Global Data (EGD)
* Ethernet Powerlink
* EtherNet/IP
* Factory Instrumentation Protocol
* FINS
* FOUNDATION fieldbus
* H1
* HSE
* GE SRTP
* HART Protocol
* Honeywell SDS
* HostLink
* INTERBUS
* IO-Link
* MECHATROLINK
* MelsecNet
* Modbus
* Optomux
* PieP
* Ethernet Powerlink
* Profibus
* PROFINET IO
* RAPIEnet
* SERCOS interface
* SERCOS III
* Sinec H1
* SynqNet
* TTEthernet

Industrial control system|

* MTConnect
* OPC DA
* OPC HDA
* OPC UA

Building automation|

* 1-Wire
* BACnet
* C-Bus
* CEBus
* DALI
* DSI
* DyNet
* Factory Instrumentation Protocol
* KNX
* LonTalk
* Modbus
* oBIX
* VSCP
* X10
* xAP
* xPL
* ZigBee

Power-system automation|

* IEC 60870
* IEC 60870-5
* IEC 60870-6
* DNP3
* Factory Instrumentation Protocol
* IEC 61850
* IEC 62351
* Modbus
* Profibus

Automatic meter reading|

* ANSI C12.18
* IEC 61107
* DLMS/IEC 62056
* M-Bus
* Modbus
* ZigBee

Automobile / Vehicle|

* AFDX
* ARINC 429
* CAN bus
* ARINC 825
* SAE J1939
* NMEA 2000
* FMS
* Factory Instrumentation Protocol
* FlexRay
* IEBus
* J1587
* J1708
* Keyword Protocol 2000
* Unified Diagnostic Services
* LIN
* MOST
* VAN
* UAVCAN

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