Few applications on IED require PROFINET scans and read/write of data records.
Running multiple applications with PROFINET scanning functionality simultaneously is not advisable for two main reasons.
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When multiple applications perform PROFINET scanning, each PROFINET device on the network responds to the Discovery and Basic Configuration Protocol (DCP) identify broadcast. This leads to a high level of network utilization for a brief period.
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Most PROFINET devices support only one application accessing them at a given time through the DeviceAccess AR (Application Relation). This means that only one application can establish a connection with a specific device at a particular point in time. If multiple applications attempt to access the same device simultaneously, conflicts and communication issues can arise. To enable other applications to access the device, the application currently in control of the DeviceAccess AR must terminate its connection, freeing up the device for other applications to connect.
To avoid these challenges, it is recommended to utilize a centralized application the PROFINET Asset Scanner. The scanner performs the scanning process on behalf of all connected applications, minimizing redundant scans and reducing network traffic. By acting as a centralized point of contact for the network, it ensures efficient utilization of network resources and prevents congestion.