Programming manual M238 | 3 MB - BERGER - POSITEC

AS-Interface Configuration
Presentation of the AS-Interface V2 Fieldbus
Introduction
The AS-Interface Fieldbus (Actuator Sensor-Interface) allows the interconnection on
a single cable of sensor devices and actuators, with the lowest level of automation.
These sensors/actuators will be defined in this documentation as slave devices.
NOTE: For more information about the TWDNOI10M3 expansion module, refer to
the TWDNOI10M3 Communication Module Hardware Guide (see Modicon
TWDNOI10M3, AS-Interface Master Module, Hardware Guide)
NOTE: All terms and definitions used in this chapter and throughout the document
concerning AS-Interface are those as defined by the AS-Interface Association
Specification version 2.11.
AS-Interface V2 Fieldbus
The AS-Interface Master module TWDNOI10M3 expansion module includes the
following functionality:
M3 profile: This profile includes all the functionality defined by the AS-Interface
V2 standard
One AS-Interface channel per module
Automatic addressing for the slave with the physical address set to 0
Management of profiles and parameters
Protection from polarity inversion on the bus inputs
The AS-Interface Fieldbus then allows:
Up to 31 standard address or 62 extended address slaves
Up to 248 inputs and 186 outputs
Up to 8 analog slaves (maximum of four analog channels per slave)
A cycle time of 10 ms maximum
A maximum of 2 TWDNOI10M3 expansion modules can be connected to a M238.
90 EIO0000000384 04/2012