Page 31 of catalogue Bus, identification and control systems of ifm Electronic GmbH

Controllers / Gateways, network extension

controller (host)

master level

adaptation to the controller master functions sequential control system automatic addressing transmission of messages data protection transmitter / receiver voltage monitoring
I/O modules for field applications

sequential control and monitoring level

transmission level

transmission physics

PC M M

plc

M

PC

M

AS-i

AS-i

AS-i

AS-i

S S S

R S S

S S S

R S S

S S S

R S S

S S S

R S S

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31

Technical information and customer service

plc master with AS- i master

gateway (coupler) e.g. Profibus-DP, DeviceNet, CAN

master for PC

AS-i master with integrated plc, e.g. AS - i controller

Different master variants.

Accessories

Examples of AS-i masters AS-i masters are available in different versions depending on the used controller: Master as PC plug-in card Master as plc plug-in card Master as fieldbus gateway Master with integrated plc

Connection technology

AS-i Sensors, Pneumatic and actuator solutions

AS-interface cable

Safety at Work

I/O modules for Control cabinets

Structure of the AS-i master.

Power supplies and earth fault monitors

Structure of the AS-i master In principle the AS-i master consists of four levels (see figure “Structure of the AS-i master”). The lowest transmission level includes the analogue part responsible for the quality of the data messages and the pulse shape on the yellow cable. This analogue part is supplied with current from the AS-i cable. This current is considered in the total calculation of the AS-i power supply. The transmission level is responsible for the exchange of individual messages with the slaves. The master cyclically detects all AS-i slaves in a rising addressing order. Detection takes 5 ms for 31 slaves or max. 10 ms for 62 slaves. The order of calls cannot be changed by the user. Via the master level data are directly available for the programmer, most of the time in a common memory area (DP-RAM). In general no further Software calls or function blocks are necessary.

Controllers / Gateways, network extension

List of articles

General information