Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 95
Chapter 6          Micro870 Controller Distributed Network Protocol
ABORT_FILE (FC Byte = 0x1E) 
30 – Abort File
This function code is used to immediately request termination of the current read/write 
operation and close the file, without saving. 
ACTIVATE_CONFIG (FC Byte = 0x1F) 
31 – Activate Config
This function code is used to begin using the configuration or executable code specified by 
the objects included in the request. 
AUTHENTICATE_REQ (FC Byte = 0x20) 
32 – Authentication Request
The master uses this function code when sending authentication messages to the controller 
that require a response
AUTHENTICATE_ERR (FC Byte = 0x21) 
33 – Authentication Request No Resp
This function code is used by the master to send authentication messages when no return 
response is required.
RESPONSE (FC Byte = 0x22) 
129 – Response
All responses except for Unsolicited Response messages use this function code.
UNSOLICITED_RESPONSE (FC Byte = 0x23) 
130 – Unsolicited Response
Unsolicited Responses always use this function code regardless of which DNP3 objects are 
included.
AUTHENTICATE_RESPONSE (FC Byte = 0x24) 
131 – Authentication Response
This function code is used to issue authentication messages to the master.