AS-Interface - Introduction

2.1Master

for primary control EV (RS 232,RS 422,RS 485) Masters with RS232 serial professional interfaces are frequently used as point-to-point connections for local solutions where a short distance to the control node is involved (Typically up to 10m). Since these masters also contain a control function with SPS functionality (Typically 16kB program memory, 8kB user memory, 1024timer and 1024counter), they are frequently used as auton-omous control units for sub areas. The program processing time is approx-imately 1000 instructions every 2 ms.The programming language is based on STEP5
Masters and GatewaysPower Supplies, Extender, RepeatersSafety at workI/O ModulesControl cabinetI/O ModulesField applicationAnalogue modulesOther modulesInductive sensorsPhotoelectric sensorsRotary encodersAccessories AS-Interface AS-Interface AS-Interface CTRL CTRL CTRL ® . After commissioning the connection between the PC and the master is broken and the application operates independently. This master is available for installation in the con-trol professional cabinet in the construction types KF (Removable terminals, power rail connection) and K5 (Screw terminal connection) or as a plug-in card for the PC (for instance VAM-CTR-PC2). If PC masters are used, then the struc-ture is similar to the structure for AS-Interface masters, except that the mas-ter is integrated in the PCI slot of the PC.Dual masters are also available: in these, two independent masters are lo-cated in a single housing.

2.2Gateways

The professional gateway places the data at the disposal of the higher-level field bus (PROFIBUS, INTERBUS, DeviceNet, EtherNet, Modbus, Modbus+, CAN, CC-Link, ...), in the requisite format. If devices with control functionality are used (see selection table), a preprocessing of AS-Interface data can be per-formed, just as with masters, so that sensors and manufacturer of actuators on the same AS-Interface network can be directly connected with one another via the control functionality. This makes it necessary to transmit only a little data for display in the higher-level bus system. This reduces the system load on the higher level bus system and hence increases performance. The pre-processing also reduces the memory requirement and the processing time, which in turn decreases the cycle time.Here, too, there are gateways available for the switch cabinet (KF, K20, or K5) and for field application (G4).
Host FieldbusGateway F AS-Interface EV

2.3Programming with AS-i Control Tools

This professional software is based on Windows (95, 98, ME, NT4, 2000, XP). After a serial connection has been prepared for the master an easy to follow con-figuration assistant professional guides you through all the further steps required and provides help text support. The AS-Interface network is displayed graphical-ly. A fault elimination routine helps in the event of nonsensical results. The finished configuration can be saved as a file and sent via download to the master/gateway. This means that in series industrial production similar configurations can be easily prepared and the configuration can be printed out for the pur-pose of system documentation.
Issue date 2004-11-19 - Catalogue AS-Interface 2004/2005

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Subject to reasonable modifications due to technical advances.Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com