4 Commissioning
BU 0250 en-3021
71
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Technical AS-Interface data
Designation
Option slot M8: Device with connector option …
… “-ASI”
… “-ASS”
… “-AUX”
… “-AXS”
AS-i supply
(yellow cable)
24 – 31.6 V DC,
≤
500 mA
1)
24 – 31.6 V DC,
≤ 25
mA
2)
AUX supply
(black cable)
Connection not possible
24 V DC ± 25%,
≤ 800
mA
Extended required master
M4
M0, M1, M2,
M3, M4
M4
M0, M1, M2,
M3, M4
1st
slave
2nd
slave
-
1st
slave
2nd
slave
-
Slave profile
S-7.A
S-7.A
S-7.0
S-7.A
S-7.A
S-7.0
I/O code
7
7
7
7
7
7
ID code
A
A
0
A
A
0
Ext. ID code 1 / 2
7
7 / 5
F
7
7 / 5
F
Address
1A – 31A and 1B – 31B
1 – 31
1A – 31A and 1B – 31B
1 – 31
As delivered
0 A
0
0 A
0
Cycle time
Slave
Master
≤
10 ms
≤
10 ms
≤
5 ms
≤
10 ms
≤
10 ms
≤
5 ms
Master
Slave
≤
21 ms
≤
10 ms
≤
5 ms
≤
21 ms
≤
10 ms
≤
5 ms
Number of application data
(BUS I/O)
From the point of view of
the AS-i master
4I/4O
2I/1O
3)
4I/4O
4I/4O
2I/1O
3)
4I/4O
From the point of view of
SK 2xxE-FDS
4I/4O
1I/2O
3)
4I/4O
4I/4O
1I/2O
3)
4I/4O
1)
For power supply exclusively via the yellow AS-i cable
2)
For the power supply to the inverter and any connected sensors or actuators via the integrated mains unit of the FI (Option "
-HVS
") and/or
via the black cable.
3)
+ extended data transfer according to the CTT2 protocol (parameter data, process data)
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4.5.3 Bus structure and topology
The AS-Interface network structure is optional (line, star, ring and tree structure) and is managed by
an AS-Interface master as an interface between PLC and slaves. An existing network can be
extended with further slaves up to a limit of 31 standard slaves or 62 slaves in the extended
addressing mode. The addressing of slaves is done by the master or a respective addressing unit.
An AS-i master communicates independently and exchanges data with the connected AS-i slaves. No
standard power supply units must be used in the AS-Interface network. For each AS-Interface line,
only one special AS-Interface power supply unit may be used for voltage supply. This AS-Interface
voltage supply is connected directly to the yellow standard cable (AS-i(+) and AS-i(-) cable) and
should be positioned as close as possible to the AS-i master to keep the voltage drop low.
To avoid interferences, the
PE connection of the AS-Interface power supply unit
(if available)
must
be
earthed
.
The brown
AS-i(+)
and the blue
AS-i(-)
wire of the yellow AS-Interface cable
must not be earthed
.
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