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3 Interface Modules
3.4.3 AS 512 protocol
3964-R
Start of
Protocol header
procedure
1 2
3 4 5 6 7 8 9 10 11 12
DLE
Identi-
Com
Destin
STX
(NAK)
fic.
mand
ation
0000
4144
0408
Transmission to SINUMERIK 8X0
Transmission to other station (e.g. PLC)
AS 512 action message frame
3–36
Message frame data
13....20 21
DW
Coord.
TEDA
no.
flag
L
Identifi-
0064
0607
00C6
cation
Error no.
Message frame data length e.g. 198 bytes
No. of bytes of ID + error no. + useful data
Coordination flag byte/bit e.g. byte 6, bit 7
No.of data words transmitted e.g. 100 words
Destination data block + starting address in the
destination data block e.g. DB4, DW8
Identification of job type output of a data block
e.g. AD
Identification of message frame
e.g. 0000 = initial message frame
© Siemens AG 1989 All Rights Reserved
3964-R
Procedure
termination
22
23...(bytes)
DLE
ETX
BCC
Useful
data
6FC5 197-0AB20-0BP0
SINUMERIK 840/880 (PJ)
06.91
DLE
(NAK)
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