Keyswitch Settings - Siemens SINUMERIK 840DE sl Commissioning Manual

11 Miscellaneous
11.1 Access protection via password and keyswitch
11.1.3

Keyswitch settings

Keylock switch
Keyswitch
applications
Influencing the
PLC user program
11-162
The keyswitch has four positions to which protection levels 4 to 7 are assigned.
The keyswitch is operated by 3 colored keys that can be removed from the lock
in different positions (see Table 11-2). The key positions can be assigned to
functions by the machine tool manufacturer or end user. Access to programs,
data and functions can be set in the machine data for each user (see Section
11.1.4 "Machine Data for Protection Levels").
The keyswitch positions are transferred to the PLC interface (interface signals
"Keyswitch positions 0 to 3" (DB10, DBX56.4 to 7) and can be evaluated by the
PLC user program.
Keyswitch position 0 has access rights of the lowest priority and position 3 ac-
cess rights of the highest priority. For example, all data that can be changed in
keyswitch positions 0, 1 or 2 can also be changed in position 3.
Access to certain data areas can be disabled with the keyswitch. Unintentional
changes to geometry data (e.g. zero offsets) or activation of program control
functions (e.g. selecting dry run feed rate) by the operator are therefore ruled
out.
Table 11-2 Keyswitch setting 0 to 3
Keyswitch pos. Retraction pos.
Position 0
0 or 1
Position 1
Black key
0 or 1 or 2
Position 2
Green key
0 or 1 or 2
or 3
Position 3
Red key
The PLC interface signals "Keyswitch positions 0 to 3" can be input either di-
rectly via the keyswitch on the machine control panel or from the PLC user pro-
gram. Only one interface signal must be set. If several interface signals are set
simultaneously, keyswitch position 3 is activated internally in the control.
SINUMERIK 840D sl Commissioning Manual CNC: ShopMill – 11/2006 Edition
DB10, DBB56
– Bit 4
Bit 5
Bit 6
Bit 7
© Siemens AG 2006 All Rights Reserved
11/2006
Security class
7
6
5
4