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byte
1
2
3
...
n+2
By a 7.5 slave is the request always 1. The response byte contains the cyclic 16-
bit slave configuration according to S-7.5 profile (analog/transparent bits are can-
celled). If the response is 08h, that means that the cyclic 16-bit configuration could
not be detected.
8.2.1.13 RD_74_DIAG
With this function the diagnosis string of a slave according to profile S-7.4 is being
read. Since the string can be longer than the command interface, it is written into
the buffer. The content of the buffer can be read in parts from indexi.
The first byte of the buffer indicates 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.
byte
1
2
3
4
byte
1
2
3
...
n+2
8.2.1.14 WRITE_ACYCLIC_TRANS
This function activates different arts of acyclic transfer (S-7.4, S-7.5 and safety
monitor). The results have to be read out with READ_ACYCLIC_TRANS. Even
though this function runs in the background and doesnt hold the master during the
transmission, it ist intended to act as a substitute for (RD_74_75_PARAM,
WR_74_75_PARAM, RD_74_75_ID, RD_74_DIAG and „Safety at Work"- monitor
diagnnostic).
Subject to reasonable modifications due to technical advances.
38
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7
6
5
2
2
2
T
7
6
5
2
2
2
T
–
7
6
5
2
2
2
T
Command Interface
Response
4
3
2
2
5C
16
result
buffer byte i
...
buffer byte i+n-1
Request
4
3
2
2
5D
16
circuit
slave address
i
Response
4
3
2
2
5D
16
result
buffer byte i
...
buffer byte i+n-1
AS-Interface
2
1
0
2
2
2
2
1
0
2
2
2
2
1
0
2
2
2
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