Siemens SINUMERIK 840DE SL - 2.2.5.3 Keyswitch settings (DB10, DBX56.4 to 7)

Detailed Description
2.2 Functions
Various NC/PLC Interface Signals and Functions (A2)
2-34 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2.2.5.3 Keyswitch settings (DB10, DBX56.4 to 7)
Key switch
The keyswitch has four positions, to which protection levels 4 to 7 are assigned. The
keyswitch comprises a number of keys in a variety of colors, which can be set to different
switch positions.
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Fig. 2-10 Switch positions 0 to 3
Switch positions
Switch position 0 has the most restricted access rights. Switch position 3 has the least
restricted access rights.
DB10, DBX56.4 / .5 / .6 / .7 (switch positions 0 / 1 / 2 / 3)
Machine-specific enables for access to programs, data and functions can be assigned to the
switch positions. For detailed information, please refer to:
References
/IAM/ Installation & Startup Guide HMI/MMC; Access Protection
Default settings via the PLC user program
The keyswitch switch 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.