3 rd_74_75_param, Rd_74_75_param – EUCHNER AS-i 3.0 Command Interface User Manual
Page 17
AS-i 3.0 Command Interface
Commands of the Command Interface
Subject to reasonable modifications due to technical advances
Id.-No.: 102875 Issue date - 3.12.2007
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17
If i
≡ 0, then the string is being transferred to the slave.
4.2.3
RD_74_75_PARAM
With this function the parameter string of a slave according to profile S-7.4 is being
read or the slave response according to profile S-7.5 is being read.
If it is about a slave according to profile 7.5, so have the data in the response buffer
the following meaning:
FFh 00
16
: Transfer is still active
FFh xx
16
: Transfer finished with error
The first byte in the buffer not equal FF
16
: slave response. The response is in the
same form registered in the buffer and transmitted over AS-i.
Since the string can be longer than the command interface, it is written into the
buffer. The content of the buffer can read in parts from index i.
The first byte of the buffer is the length of the read string.
If i
≡ 0, the string is being read from the slave, otherwise the function responses
out of the memory; the data can be read consistently.
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
5A
16
2
T
–
circuit
3
slave address
4
i
5
n
6
buffer byte i
…
…
n+5
buffer byte i+n-1
Response
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
5A
16
2
T
results
Request
byte
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
5B
16
2
T
–
circuit
3
slave address
4
i