DF-1 Protocol
In this article, we are going to analyze in depth DF-1 Protocol and its impact on today's society. DF-1 Protocol is a topic that has generated a lot of debate and controversy in recent years, and it is important to explore all perspectives and opinions on the matter. From its origin to its evolution over time, DF-1 Protocol has played a crucial role in people's lives, affecting aspects such as politics, technology, culture and the environment. Through this article, we will delve into the different dimensions of DF-1 Protocol and try to understand its influence in today's world.
DF-1 / DF1 protocol is an asynchronous byte-oriented protocol that is used to communicate with most Allen Bradley RS-232 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
External links
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