The Master Mode – Commands, Sequence, Programming
4.2 Data Transfer
4.2.3 Operating Extended AS-i Slaves with Standard AS-i Masters
Note
Please note the following information about operating extended AS-i slaves with standard AS-i masters!
S If A slaves are connected to standard masters, make sure that the most significant slave bit (bit 4) of each A slave is set to “0”. The most significant parameter bit (bit 4) must also be set to “1” (default value).
Without these settings, the A slave cannot be operated with a standard master.
S B slaves must not be connected to standard AS-Interface masters.
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The Master Mode – Commands, Sequence, Programming
4-12 SIMATIC NET AS-Interface – Introduction and Basic Information
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References
/1/
AS-Interface Das Aktuator-Sensor-Interface für die Automation
Werner Kriesel, O.W. Madelung, Carl Hanser Verlag München Wien 1994
/2/
AS-Interface Complete Specification
can be ordered from the AS-i Association e.V.
Address:
AS-International Association e.V.
Geschäftsführung: Dr. Otto W. Madelung Auf den Broich 4A
D – 51519 Odenthal Germany
Tel.: +49 – 2174 – 40756 Fax.: +49 – 2174 – 41571
(The AS-i technology is promoted by the AS-Interface Association e. V.) Internet address of the AS-International Association e.V.:
http://www.as-interface.com
/3/
SIMATIC NET Industrial Communications Networks Catalog IK 10
The catalog can be ordered from your local SIEMENS branch office or distributor.
/4/
Profibus & AS-Interface Components on the Field Bus Catalog ST PI
The catalog can be ordered from your local SIEMENS branch office or distributor.
A
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References
A-2 SIMATIC NET AS-Interface – Introduction and Basic Information
C79000-G8976-C089/03
/5/
SIMATIC NET
Industrial Communications Networks PROFIBUS Networks Manual
Siemens AG
/6/
PROFIBUS standard EN 50170
Order numbers
The order numbers of the SIEMENS documentation listed above can be found in the catalogs “SIMATIC NET Industrial Communication, Catalog IK10” and
“SIMATIC Programmable Controllers SIMATIC S7 / M7 / C7”.
You can order these catalogs and obtain additional information from your local SIEMENS branch or distributor.
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Glossary
APF
AS-i Power Fail. Flag or LED display that indicates that the power supply on the AS-i cable is too low or has failed (for example failure of the AS-i power supply unit).
AS-i (AS-Interface)
Actuator-sensor interface. A network system for the lowest field area of the automation range. It is suitable for networking sensors and actuators with control devices. (previously: SINEC S1)
AS-i A/B slave
AS-i A/B slaves use the extended addressing mode. Pairs of A/B slaves can be assigned to one address on the AS-Interface; by organizing addresses in this way, up to 62 AS-i A/B slaves can be attached to the AS-Interface.
AS-i analog slave
AS-i analog slaves are special AS-i standard slaves that exchange analog values with the AS-i master.
AS-i library
Library whose functions allow the user program to communicate with the AS-i driver.
AS-i master
The AS-i master is used to monitor and control the simplest binary actuators and sensors via AS-i modules or AS-i slaves.
A distinction is made between a standard AS-i master and an extended AS-i master.
B
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Glossary
B-2 SIMATIC NET AS-Interface – Introduction and Basic Information
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AS-i module
For the AS-Interface, a module concept has been defined that allows the block-like linking of AS-i slaves – sensors and actuators – via AS-i modules.
The following types of module exist:
The active AS-i module with an integrated AS-i chip; using this, up to four con-ventional sensors and actuators can be connected.
The passive AS-i module; this functions as a distributor and provides a connec-tion for up to four sensors and actuators with an integrated AS-i chip.
In keeping with the concept of the standard AS-i master and the extended AS-i master, either AS-i chips with standard functions or with extended functions are used in the AS-i slaves.
AS-i slave
All the nodes that can be addressed by an AS-i master are known as AS-i slaves.
AS-i slaves are distinguished by their design (AS-i modules and sensors or actuators with an integrated AS-i attachment) and their address range (AS-i standard slaves and AS-i A/B slaves with the extended addressing mode).
AS-i standard slave
An AS-i standard slave always occupies one address on the AS-Interface; with this address organization, up to 31 AS-i standard slaves can be attached to the AS-Interface.
Extended AS-i master
An extended AS-i master supports 31 addresses that can be used for standard AS-i slaves or AS-i slaves with the extended addressing mode. This increases the number of addressable AS-i slaves to a maximum of 62.
The extended AS-i masters of SIMATIC NET support the integrated transfer of AS-Interface analog slaves that operate in compliance with Profile 7.3/7.4 of the AS-Interface Specification.
LAS
List of activated slaves.
LDS
List of detected slaves.
LPS
List of permanent slaves.
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Glossary
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Nibble
A nibble is a unit of information consisting of four bits.
Standard AS-i master
Up to 31 standard slaves or slaves with the extended addressing mode (A slaves only) can be attached to a standard AS-i master.
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Glossary
B-4 SIMATIC NET AS-Interface – Introduction and Basic Information
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