Rockwell Automation 1766-L32AWA, User Manual, Page: 260 / 310

260 Rockwell Automation Publication 1766-UM001O-EN-P - September 2021
Appendix F MicroLogix 1400 Distributed Network Protocol
When a master sends the function code OPEN_FILE(25) with the file
command object, the file name string in File command object must be in this
directory and file name format:
• /EXE/[processorName].IMG
The directory and file name extension string must all be in capital letters and
the string size cannot be exceed 64 bytes. The file name [processorName] is
from the Processor Name in the Controller Properties dialog in RSLogix 500/
RSLogix Micro.
The maximum file size is 384 Kbytes. The controller supports uploading of user
programs up to 256 Kbyte in size when Recipe is not configured. When Recipe
is configured, Maximum file size is 384 Kbytes.
The first application segment of the ladder program should be larger than or
equal to the size of System Exe File structure, 64 bytes.
An application segment of the ladder program cannot be exceed 2048 bytes.
Rules for Initializing a User Program
A DNP3 master should send the function code DELETE_FILE(27) for
initializing user programs.
When controller receives a request with the function code DELETE_FILE(27),
it clears the current user program which was downloaded into the controller,
and restores the default user program.
User programs cannot be initialized while the controller is in Executing mode.
Before initializing programs, a mode change request should be sent with the
function code STOP_APPL(18).
Rules for uploading Communication Status Files
A DNP3 master should send the function code OPEN_FILE(25), READ(1), and
CLOSE_FILE(26) for uploading Communication Status Files.
The function code WRITE(2) for downloading Communication Status Files is
not supported.
The file name should be /DIAG/CH0.CSF, /DIAG/CH1.ESF, and /DIAG/
CH2.CSF for Channel 0, Channel 1, and Channel 2 respectively.
Start and Stop User Programs (Mode Change) via DNP3 Network
This section covers how to change the controller mode via DNP3 network.
To change the controller mode, use the function codes FC_INITIALIZE_APPL
(16), FC_START_APPL (17) and FC_STOP_APPL (18).