Modbus RTU Master Task
The port settings here are the same settings also accessible on the Port Settings page for Modbus. You can set them from either page.
The maximum table sizes for the Modbus RTU Master are defined here. Keeping the tables set to a range that you will actually use will improve efficiency.
The default XML configuration file is entered here. This is the file that the Modbus RTU Master will attempt to automatically load upon first time startup. After that, settings are retained in the database, and further file activity can be managed on the Config File page for the Modbus RTU Master.
Activity timeout is a form of watchdog. If the task manager does not see the Modbus RTU Master task update its activity indicator within this amount of time, the task manager will restart the Modbus RTU Master. If set to zero, the watchdog is disabled. The task manager itself is restarted by the Linux cron if it stops responding.