Overview

By using an example, this topic shows the workflow to implement data exchange between the following devices that exist in system project System_1:

  • M580_1, which is the local rack of an M580 standalone PAC in which a BMENOC03•1 communication module is configured as local slave.

  • M580_2, which is the local rack of a second M580 standalone PAC whose CPU module scans the local slave.

A second example using the same devices shows the workflow to apply changes to the data that is exchanged.

Data Exchange Implementation Workflow

The first example shows the steps to be performed on both PACs to implement the data exchange. Proceed with M580_1 first.

(1) Creates a device DDT named Instance Name_LSx in the control project. It is based on the DTM configuration of the local slave but without the mapped items.

(2) Adds the BMENOC03•1 to the device list in the control project of the scanner and creates a device DDT named Instance Name with the register sizes and item mapping as defined in the I/O profile of the local slave but where:

  • The input register corresponds to the output register of the local slave.

  • The output register corresponds to the input register of the local slave.

Data Exchange Modification Workflow

The second example is the continuation of the first one. It shows the steps to be performed on both PACs to apply changes to the item mapping that are performed in the I/O profile of the BMENOC03•1 local slave (for example, changing the input register size and item mapping). Proceed with M580_1 first.

(1) Sets the build state of the executable of M580_2 to Out Of Date .

(2) Updates the Instance Name_LSx device DDT in the control project with the new input register size but not the item mapping.

(3) Updates in the Instance Name device DDT of the control project, the output register size and item mapping.