Wr_74_75_Param; Rd_74_75_Param - Pepperl+Fuchs VBG-PB-K25 Manual

8.2.1.10 WR_74_75_PARAM

Description:
• with this function the parameter string of a slave according to profile S-7.4 is be-
ing written
or
• the data tranfer with a slave according to profile S-7.5 is started.
If it is about a slave according to profile 7.5, data have to be registered into the buff-
er in the same form, as they have to be sent by AS-i.
Since the string can be longer than the command interface, it will partly be written
into the buffer and then be transferred to the slave.
n is the length of the part of the string which should be written into the buffer from
index i on.
If i ≡ 0, then the string is being transferred to the slave.
byte
1
2
3
4
5
6
...
n+5
byte
1
2

8.2.1.11 RD_74_75_PARAM

Description:
• with this function the parameter string of a slave according to profile S-7.4 is be-
ing 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 00h: Transfer is still active
FFh xxh: Transfer finished with error
The first byte in the buffer notequal FFH: slave response. The response is in the
same form registered in the buffer and transmitted over AS-i.
Subject to reasonable modifications due to technical advances.
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7 6 5
2 2 2
T –
7 6 5
2 2 2
T
Command Interface
Request
4 3
2 2
5A
16
circuit
slave address
i
n
buffer btye i
...
buffer byte i+n-1
Response
4 3
2 2
5A
16
results
AS-Interface
2 1 0
2 2 2
2 1 0
2 2 2
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