AS IEC 61131.5-2004

Adopts IEC 61131-5:2000 which specifies communication aspects of a programmable controller. It specifies from the viewpoint of a PC how any device can communicate with a PC as a server and how a PC can communicate with any device. In particular, it specifies the behaviour of the PC as it provides services on behalf of other devices and the services the PC application program can request from other devices.

This part of IEC 61131 specifies communication aspects of a programmable controller. Itspecifies from the viewpoint of a PC how any device can communicate with a PC as a serverand how a PC can communicate with any device. In particular, it specifies the behavior of thePC as it provides services on behalf of other devices and the services the PC applicationprogram can request from other devices. It is not intended to specify how any device cancommunicate with any device using a PC as a router or gateway. The behavior of the PC as acommunication client and server is specified independent of the particular communicationsubsystem, but the communication functionality may be dependent on the capabilities of thecommunication subsystem used.The scope of this part is a subset of the "communication model" shown in figure 2 ofIEC 61131-3; namely figures 2c and 2d are included in the scope of this part. Additionally, the means defined in this part of IEC 61131 may be used for communications within a program orbetween programs.The mapping of the PC behavior to some particular communications subsystems is provided in the annexes.

First published as AS IEC 61131.5-2004.Reconfirmed 22/10/2015. First published as AS IEC 61131.5-2004.