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7.1.3.3
AS-i 16-Bit Data
A-Slaves map the data on channels 1 and 2.
B-Slaves map the data on channels 3 and 4.
In addition to the access via the command interfaces, the 16-bit data for or by the
slaves with 16-bit value can by exchanged cyclically (profile 7.3., S-7.4, S-6.0, S-
7.5, S-7.A.8, S-7.A.9, S-7.A.A). Competing writing access attemps on analog out-
put data will not be blocked by each other. If analog data for a particular slave are
being transmitted both cyclically and acyclically with the command interface or via
DP V1 connections, the acyclically transmitted values will be overwritten by the cy-
clically transmitted values.
AS-i 16-bit data can be transmitted in a reserved data area. Therefore accessing
analog data is as easy as accessing digital data.
byte
1
2
3
4
...
n-3
n-2
n-1
n
7.1.3.4
Command Interface
Only using the IDs of the process data field the AS-i/PROFIBUS gateway can be
used as M0 AS-i master. By using the command interface (see chapter 7.1.3) the
functions of a M3 master become available.
byte
1
2
3
...
36
Subject to reasonable modifications due to technical advances.
26
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7
6
5
2
2
2
slave 31-n/8, channel 1, high byte
slave 31-n/8, channel 1, low byte
slave 31-n/8, channel 2, high byte
slave 31-n/8, channel 2, low byte
slave 31, channel 3/slave 31B, channel 1, high byte
slave 31, channel 3/slave 31B, channel 1, low byte
slave 31, channel 4/slave 31B, channel 2, high byte
slave 31, channel 4/slave 31B, channel 2, low byte
7
6
5
2
2
2
T
request parameter byte 34
AS-i 16-bit data
4
3
2
2
...
Request
4
3
2
2
command
circuit
request parameter byte 1
...
AS-Interface
PROFIBUS DP
2
1
0
2
2
2
2
1
0
2
2
2
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