Siemens SINUMERIK 840C - DB 3 Data Transfer Areas

5 PLC Interface 07.97
5.2.3 DB 3 data transfer areas
5.2.3 DB 3 data transfer areas
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7 6 5 4 3 2 1 0
Bit No.
Byte No.
DL 0
Data
channel 8
Data
channel 7
Data
channel 6
Data
channel 5
Data
channel 4
Data
channel 3
Data
channel 2
Data
channel 1
DR 0
Data
channel 16
Data
channel 15
Data
channel 14
Data
channel 13
Data
channel 12
Data
channel 11
Data
channel 10
Data
channel 9
DL 1
Data
channel 24
Data
channel 23
Data
channel 22
Data
channel 21
Data
channel 20
Data
channel 19
Data
channel 18
Data
channel 17
DR 1
Data
channel 32
Data
channel 31
Data
channel 30
Data
channel 29
Data
channel 28
Data
channel 27
Data
channel 26
Data
channel 25
DL 2
Data
channel 8
Data
channel 7
Data
channel 6
Data
channel 5
Data
channel 4
Data
channel 3
Data
channel 2
Data
channel 1
DR 2
Data
channel 16
Data
channel 15
Data
channel 14
Data
channel 13
Data
channel 12
Data
channel 11
Data
channel 10
Data
channel 9
DL 3
Data
channel 24
Data
channel 23
Data
channel 22
Data
channel 21
Data
channel 20
Data
channel 19
Data
channel 18
Data
channel 17
DR 3
Data
channel 32
Data
channel 31
Data
channel 30
Data
channel 29
Data
channel 28
Data
channel 27
Data
channel 26
Data
channel 25
Data transfer areas
A c t i v a t i o n b i ts f r o m P L C
15 14 13 12 11 10 9 8
A c t i v a t i o n b i ts f r o m P L C
A c t i v a t i o n b i ts f r o m P L C
A c t i v a t i o n b i ts f r o m P L C
S t a t u s b i ts f r o m NC " V a l i d c o n f i g u r a t i o n o f d a t a c h a n n e l "
S t a t u s b i ts f r o m NC " V a l i d c o n f i g u r a t i o n o f d a t a c h a n n e l "
S t a t u s b i ts f r o m NC " V a l i d c o n f i g u r a t i o n o f d a t a c h a n n e l "
S t a t u s b i ts f r o m NC " V a l i d c o n f i g u r a t i o n o f d a t a c h a n n e l "
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DW 13
R e s e r v e d
DL 14
P o i n t e r t o d a t a t r a n f e r a r e a 1
( = N o. o f d a t a w o r d )
DR 14
P o i n t e r t o d a t a t r a n f e r a r e a 2
( = N o. o f d a t a w o r d )
DL 29
P o i n t e r t o d a t a t r a n f e r a r e a 31
( = N o. o f d a t a w o r d )
DR 29
P o i n t e r t o d a t a t r a n f e r a r e a 32
( = N o. o f d a t a w o r d )
DL 30
DR 30
DL x
DR x
Error when
writing NC
data
Error when
reading NC
data
Synchro-
nous data
channels
”New
value” write
NC data
”New
value” read
NC data
DL
x+1
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
DR
x+1
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
DL
x+2
Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16
DR
x+2
Bit 31 Bit 30 Bit 29 Bit 28 Bit 27 Bit 26 Bit 25 Bit 24
C o n t r o l b i t s
V A L U E
V A L U E
V A L U E
V A L U E
DW 4
R e s e r v e d
J o b N o . (a c k n o w l e d g e m e n t f r o m N C )
DR12
Value new
Write NC
data
Value new
Read NC
data
Synchronous data channels
Note:
For a description of the ”Fast data channels” function, please refer to the Installation
Instructions, SINUMERIK 840C, SW 4.
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x = Data transmission range nos. 1 to 32 via pointer (DW 14 to 29)
5–20 © Siemens AG 1992 All Rights Reserved 6FC5197- AA60
SINUMERIK 840C (IA)