User Alarm - Siemens SINUMERIK 808D Parameter Manual

Detailed descriptions of interface signals

5.2 User alarm

The signals can be subdivided into the following groups (see above):
● General signals
● Mode signals
● Channel signals
● Axis / spindle signals
Notes on the PLC interface signal address representation
Currently, PLC interface signal addresses are represented by the V structure on the HMI while
the manual shows them by the DB structure.
See the following table for the relationship between the two representations.
V Structure
Access
Bit
Byte
Word
Double Word
5.2 User alarm
Active alarm response
DB1600
DBX2000.0
Edge evaluation: No
Signal state 1
Signal state 0
Special cases, errors, ... The start of a part program selected in the channel by part program command
corresponding to ...
Note for the reader
DB1600
DBX2000.1
Edge evaluation: No
Signal state 1
376
Example
V38000002.1
VB38000002
VW38000002
VD38000004
NC start disable
Signal(s) from PLC → HMI
Signal(s) updated: Cyclic
The NC start disable prevents a part program from being started with the NC
start signal DB3200 DBX7.1 (NC start) == 1.
The NC start disable is not active.
START in another channel (program coordination) is not prevented by the
interface signal:
DB3200 DBX7.0 (NC start disable) == 1.
IS "NC start"
Read-in disable
Signal(s) from PLC → HMI
Signal(s) updated: Cyclic
The main run reads in no more preprocessed part program blocks.
Note:
The signal is only active in the AUTOMATIC and MDI modes.
DB Structure
Example
DB3800.DBX2.1
DB3800.DBB2
DB3800.DBW2
DB3800.DBD4
Access
Bit
Byte
Word
Double word
Parameter Manual
List Manual, 01/2017