Behavior of functions at different access levels - References - SIMATIC AX - AX Hardware Engineering documentation - Hardware Engineering,

The table below describes which online functions are possible in the various protection levels.

Function	Full access	Read access	HMI access	No access
Identification of the device, e.g. via "DCP Utility tool"	Yes	Yes	Yes	Yes
--------	-----------	-----------	----------	---------
Reading time-of-day	Yes	Yes	Yes	No
Executing online functions within the hardware configuration (Online & Diagnostics)	Yes	Yes	Yes	No
--------	-----------	-----------	----------	---------
Requesting operating state change online (RUN/STOP/warm restart)	Yes	Yes	No	No
Set time-of-day	Yes	Yes	No	No
--------	-----------	-----------	----------	---------
Deleting code blocks, hardware configuration in the CPU	Yes	No	No	No
Downloading individual code blocks, hardware configurations to the CPU	Yes	No	No	No
Loading PLC program to the device and resetting	Yes	No	No	No
Firmware update of CPUs or I/O modules	Yes	No	No	No
Online editing of blocks	Yes	No	No	No
Modifying outputs in STOP mode	Yes	No	No	No