Siemens SINUMERIK 880 SW 6 Planning Manual page 355

14 Command Channel (DB 41)
14.3 User interface signals
USEFUL DATA DB/DX NUMBER
The number of the data block in which the user data for the NC functions are stored is stated
here. The data block can be type DB or DX, as specified in the DB/DX signal (DW m + 2, bit
15).
Note:
If the useful data DB/DX and the target DB/DX are identical when the function "Read NC data
d)
via command channel" is executed, the data specification in the useful data DB/DX is
overwritten by the supplied NC data after the transfer. The length specification is replaced by
the number of words read.
DATA WORD NUMBER IN USEFUL DATA DB/DX
The number of the 1st data word of the user data in the USEFUL DATA DB is stated here.
(dataword with length specification).
d)
DB/DX
1 signal: The target data block in which the NC data are stored when the function "read NC
data via command channel" is executed is of type DX.
0 signal: The target data block is of type DB.
TARGET DB/DX NUMBER
Here the number of the data block is specified in which the number of words read and the NC
data are stored when the function "read NC data via command channel" is executed. The user
data DB/DX and the target DB/DX can be identical.
The data block can be of type DB or DX. This is specified in the bit DB/DX (DW m + 4, bit
15).
DATA WORD IN TARGET DB/DX
Here the number of the data word in the target DB/DX is specified in which the PLC operating
system enters the length of the NC data supplied when the function "read NC data via
command channel" is executed.
_______
d) with GA2, software version 1 and higher
14–4
d)
d)
© Siemens AG 1991 All Rights Reserved
01.93
DR m+2
DW m+3
DW m+4, bit 15
DR m+4
DR m+5
6ZB5 410-0HE02
SINUMERIK 880 (PJ)