Parameterizable Protection Levels - Siemens SINUMERIK 840D sl Function Manual

A2: Various NC/PLC interface signals and functions
2.3 Functions
References
● CNC Commissioning Manual: NCK, PLC, Drives, Fundamentals,
Section: Basics on the protection levels
● Commissioning Manual SINUMERIK Operate (IM9); General Settings,
Section: Access levels
Default settings via the PLC user program
The keyswitch positions are transferred to the NC/PLC interface via the basic PLC program.
The corresponding interface signals can be modified via the PLC user program. In this context,
from the point of view of the NC, only one switch position should ever be active, i.e. the
corresponding interface signal set to 1. If, from the point of view of the NC, a number of switch
positions are active at the same time, switch position 3, i.e. the keyswitch position with the
least restricted access rights, will be activated internally by the NC.
2.3.5.3

Parameterizable protection levels

Parameterizable protection level
The parameter level can be freely parameterized for a variety of functions and data areas. The
protection level is set via operator-panel machine data, designated as follows:
$MM_USER_CLASS_<
Examples:
$MM_USER_CLASS_READ_TOA
$MM_USER_CLASS_WRITE_TOA
$MM_USER_CLASS_READ_PROGRAM
$MM_USER_CLASS_WRITE_PROGRAM
Default values
On delivery or following standard commissioning, with very few exceptions, the default value
for the protection level will be set to 7, i.e. the lowest protection level.
64
Function_DataArea >
Read tool offsets
Write tool offsets
Read part programs
Write/edit part programs
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions