Command Channel (Db 41); General - Siemens SINUMERIK 880 SW 6 Planning Manual

01.93
14

Command Channel (DB 41)

14.1

General

The PLC user program can trigger functions in the NC by means of the command channel. For
that purpose, user data are transferred to the NC (e.g. speed, acceleration time constant) or
d)
read from the NC ("Read NC data via command channel" function). The format of the user
data depends on the NC function concerned.
The command channel comprises up to 8 user interfaces (UIs), all of which are contained in
DB 41). The number of command channel user interfaces that are to be processed by the PLC
operating system is specified in the PLC machine data.
Number of user interfaces:
Bit
15
Data
word
DW 0
DW 1
DW 2
DW 3
DW 4
DW 5
DW m
DW m+1
0:DB
DW m+2
1:DX
DW m+3
0:DB
DW m+4
1:DX
DW m+5
DW m+6
User interface
Address m
Structure of DB 41
_______
d) with GA2, software version 1 and higher
© Siemens AG 1991 All Rights Reserved
SINUMERIK 880 (PJ)
MD 033 Value range: 0 ... 8 (PLC I)
MD 233 Value range: 0 ... 8 (PLC II)
DL
14 13 12 11 10 9
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
No. of command channel function
Error number
No. of user data DB/DX
No. of data word in user data DB/DX
No. of the target DB/DX
No. of data word in the target DB/DX
Reserved
1
6
6ZB5 410-0HE02
14 Command Channel (DB 41)
DR
8 7 6 5 4 3
Request bits of user interface
8 7 6 5 4
Error bits of user interface
8 7 6 5 4
Reserved
d)
d)
2 3 4 5 6 7
13 20 27 34 41 48 55
14.1 General
2 1 0
3 2 1
3 2 1
8
14–1