Siemens ISI EN 50295 - Manual (Page 3)

Siemens IK PI · 2004 6/3
AS-Interface
Introduction
Configuration examples
6
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Function
Operating modes
In general, the master interfaces distinguish between the follow-
ing operating modes:
I/O data transfer
The inputs and outputs of the binary AS-Interface slaves are
read and written in this operating mode.
Analog value transmission
The AS-Interface masters according to the Complete
AS-Interface Specification V2.1 support integrated analog value
processing. This means that data exchange with analog
AS-Interface slaves (according to analog profile 7.3 or 7.4) is just
as easy as with digital slaves.
Command interface
In addition to the I/O data exchange with binary and analog AS-
Interface slaves, the AS-Interface masters offer a range of addi-
tional functions through the command interface.
This means that, from user programs, slave addresses can be
assigned, parameter values can be transferred and diagnostic
information can be read out.
■
Design
Process or field communication
AS-Interface is used wherever individual actuators and sensors
are physically distributed throughout the machine (e.g. in a bot-
tling plant or on a production line).
AS-Interface replaces complicated wiring harnesses and con-
nects binary and analog actuators and sensors, such as proxim-
ity switches, valves or indicator lights, to a controller (e.g. SI-
MATIC) or PC.
In practice this means: The installation runs without problems
because data and power are transported through a single com-
mon cable. No specialist know-how is required for installation
and startup. In addition, the simple installation and clear struc-
turing of the wiring and special cable design not only consider-
ably reduce the risk of faults but also reduce service and main-
tenance costs.
Example of a system configuration
G_IK10_XX_20027
Connection via AS-Interface cable
AS-Interface distributor
(without AS-Interface chip)
AS-Interface cable
AS-Interface
power section
Branch M12
K60
AS-Interface distributor
(without AS-Interface chip)
Repeater
LOGO!
Operator panel
K45
(with AS-Interface chip)
for connection of
standard sensors
Standard encoders
e.g. position switches
Standard sensor
e.g. inductive BERO
Compact starter IP 65
max 100 m
SONAR BERO
with int. AS-Interface
AS-Interface
power section