Siemens SIMATIC Distributed I/O System DP/ASi Link Manual page 122

Parameterization Message
C.2 Parameterization Data for ASi Slaves
Structure
You have to define four bytes for every ASi slave when you assign parame-
ters. These four bytes contain all the data required for an ASi slave and data
exchange with it. You will find the structure of these four bytes for every ASi
slave in Table C-6.
Table C-6 Parameterization data for an ASi slave
Byte A
Bits 7 to 4 Bits 3 to 0 Bits 7 to 4
Configura- Parameters ID code of
tion status of ASi ASi slave
slave
1
If you do not assign any inputs, you must assign FF
2
FIf you do not assign any outputs, you must assign FF
Byte A – bits 7 to 4 With the configuration status, you specify whether the ASi slave is contained
Configuration in the ASi. The following two values are possible:
status
Byte A – bits 3 to 0
Refer to the data sheet of the ASi slaves for the range of values of the param-
Parameters of eters of the ASi slaves and their significance. The default parameter setting is
ASi slave
0 and applies to all ASi slaves.
Byte B – bits 7 to 4
The ID code specifies the manufacturer of the ASi slave modules. The stan-
ID code dard ID code is 0 and can be used by all manufacturers. If the ASi slave ex-
pects a different ID code, you can take it from the data sheet for the ASi
slave.
Byte B – bits 3 to 0 The I/O code characterizes the ASi slave with reference to its inputs and out-
I/O code
puts. You will find the I/O code in the data sheet for the ASi slave. If you
know the input and output assignment, you can read the I/O code from
Table B-1 in Appendix B.
Bytes C and D –
After performing optimization of the address assignment (refer to Appen-
input and output dix C.3), you can take both the byte number and the number for every ASi
areas
slave from the address space template.
The position of the first input or output bit in the address space template (re-
fer to Fig. C-1) characterizes every ASi slave. The specifications are impor-
tant for the address assignment.
C-6
Byte B
Bits 3 to 0
I/O code Codification of input
of ASi area
slave
to byte C.
H
to byte D.
H
8 for configured ASi slaves (bits 7 to 4)
H
0 for unconfigured ASi slaves (bits 7 to 4)
H
1
Byte C Byte D
Bits 7 to 0 Bits 7 to 0
Codification of output
area
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
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