Application Addresses Rule

Rules for application addresses include:

An application address must be unique for each point on your computer.

An application address does not have to be sequentially assigned.

The same application address can be used for multiple devices communicating to the same CIMPLICITY device communications process. When multiple Allen­Bradley Ethernet device communications processes are configured for a CIMPLICITY host computer, the same application address cannot be sent through the same network interface to two different CIMPLICITY device communications processes.

You cannot dynamically update the application address for an unsolicited data point.

The application address is used to identify the CIMPLICITY point to the RSLINX interface software. As a result, there are several restrictions that must be applied to the use of application addresses with unsolicited point data:

For each unsolicited message that a device sends to your CIMPLICITY project you must configure a device point with an application address. Configure the device point to have the exact same size and data type as the message being sent. Also the application address should match the CIF offset of that message.

For example, if you are sending a message containing integers from N7:20 to N7:40 (inclusive) at CIF offset 3, you should configure a point of type INT or UINT with 21 elements at the address N7:20>3.

If you use the ALL_UNSO parameter and configure additional overlapping points for an unsolicited message, the additional points should not have an application address in their point address and do not need to be the exact same size as the unsolicited message.

To insure that unsolicited communications is correctly initiated for every message, points that have been configured with an application address should never be configured as Delay Load point or as Just-in-time attributes of a point object.

More information

Rules for defining points for unsolicited data.