Siemens SIMATIC ET 200SP Manual page 53
As-interface master cm as-i master st 3rk7137-6sa00-0bc1
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- System manual (320 pages) ,
- Manual (270 pages) ,
- Operating instructions manual (166 pages)
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Bit assignment of the process image
In a project in which the AS-i slaves are not configured in STEP 7, 4 bits of digital input data
and 4 bits of digital output data are assigned to the process image. I/O bits that are not
assigned by the slave contain the substitute value 0. The assignment of the process image
depends on the AS-i slave type. For digital slaves with up to 4-bit inputs and 4-bit outputs,
the following standard assignment table applies:
Table 7- 6
Standard assignment table for inputs/outputs of digital AS-i slaves
IO code
Number
(Hex
Inputs/
value)
outputs
0
4 DI
1
3 DI / 1 DQ
2
4 DI / 1 DQ
3
2 DI / 2 DQ
4
4 DI / 2 DQ
5
1 DI / 3 DQ
6
4 DI / 3 DQ
7
4 DI/4 DQ
8
4 DQ
9
1 DI / 3 DQ
A
1 DI / 4 DQ
B
2 DI / 2 DQ
C
2 DI / 4 DQ
D
3 DI / 1 DQ
E
3 DI / 4 DQ
Information about the table:
DI: Digital input
DQ: Digital output
The actual numbering of the inputs/outputs of the AS-i slaves depends on the manufacturer
of the slave.
In the case of slaves with extended addressing (A/B slaves), column "Bit 3" of the output
process image is not assigned data. Exception: In the case of slaves with profile IO.ID.ID2 =
7.A.7, "Bit 3" of the output process image is also assigned.
In particular, the table does not apply to slaves of Combined Transaction Type (CTT) with
profiles 6.0, 7.3, 7.4, 7.5.5, 7.A.5, 7.A.8, 7.A.9, 7.A.A, B.A.5 (IO.ID or IO.ID.ID2), see data
sheet of slave. For assignment of safety slaves (profile 0.B and 7.B), see Section 7.2.3
"Special characteristics of AS-i Safety Slaves".
AS-Interface master CM AS-i Master ST (3RK7137-6SA00-0BC1)
Manual, 07/2017, A5E02655262020A/RS-AD/004
Input process image
Bit 3
Bit 2
IN 3
IN 2
IN 1
-
IN 2
IN 1
IN 3
IN 2
IN 1
-
-
IN 1
IN 3
IN 2
IN 1
-
-
-
IN 3
IN 2
IN 1
IN 3
IN 2
IN 1
-
-
-
IN 0
-
-
IN 0
-
-
IN 1
IN 0
-
IN 1
IN 0
-
IN 2
IN 1
IN 0
IN 2
IN 1
IN 0
Data exchange between the user program and AS-i slaves
Bit 1
Bit 0
Bit 3
IN 0
-
IN 0
OUT 0
IN 0
OUT 0
IN 0
OUT 1
IN 0
OUT 1
IN 0
OUT 2
IN 0
OUT 2
IN 0
OUT 3
-
OUT 3
-
-
-
OUT 3
-
-
-
OUT 3
-
-
-
OUT 3
7.2 Transmitting AS-i digital values
Output process image
Bit 2
Bit 1
-
-
-
-
-
-
OUT 0
-
OUT 0
-
OUT 1
OUT 0
OUT 1
OUT 0
OUT 2
OUT 1
OUT 2
OUT 1
OUT 2
OUT 1
OUT 2
OUT 1
-
OUT 1
OUT 2
OUT 1
-
-
OUT 2
OUT 1
Bit 0
-
-
-
-
-
-
-
OUT 0
OUT 0
OUT 0
OUT 0
OUT 0
OUT 0
OUT 0
OUT 0
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