Detailed Description; Various Interface Signals And Functions (A2); Signals From Plc To Nc (Db10) - Siemens SINUMERIK 840Di Function Manual

Detailed Description

2.1

Various interface signals and functions (A2)

2.1
2.1.1

Signals from PLC to NC (DB10)

DB10
DBX56.4 - DBX56.7
Edge evaluation: no
Significance of signal Access to certain data types can be disabled depending on the key-operated switch position.
Application
example(s)
Corresponding to .... Disabling using a password
NC/PLC Interface Signals (Z1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Key-operated switch positions 0 to 3
Signal(s) updated: cyclic
Input, changing, deleting data as well as certain operations on the operator panel can be disabled
for certain user groups in this way.
Key-operated switch position 0 offers the fewest access rights and position 3 the most access
rights.
The signals "key-operated switch positions 1 to 3" can either be entered directly from the key-
operated switch on the machine control panel or from the PLC user program.
Only one interface signal may be set in each case. If several positions are set simultaneously
(interface signals), then they are no longer valid and key-operated switch position 3 is automatically
set by the control.
The data areas that can be disabled are assigned to the key-operated switch positions using the
MMC machine data for protection levels.
The following signal combinations apply:
The following signal combinations apply:
Key-operated switch position
0
1
2
3
Depending on the rights assigned to the operator, programmer or installation engineer, certain
functions will be disabled by the key-operated switch. Unintentional changes to data (e.g. zero
offsets) or activation of program conditions (e.g. selecting dry run feed rate) by the operator can
therefore be prevented.
DB10, DBB56
Bit 7 Bit 6 Bit 5
0 0 0
0 0 1
0 1 0
1 0 0
2
Bit 4
1
0
0
0
2-1