A network’s tuning policies hold the collections of rules to evaluate both write requests (for example, to writable proxy points) as well as the acceptable read requests from polling. Some drivers also support the association to different poll frequency groups (Slow, Normal, and Fast). Tuning policies are important because they affect the status of the driver’s proxy points. The following information provides guidelines for using and configuring tuning polices for N2 devices.

For networks of N2 devices, you typically create multiple tuning policies to achieve the following benefits:

You can apply different tuning policies according to the source point’s application usage.
You can apply different tuning policies to accommodate multiple N2 networks (each with different performance capabilities)
You can apply different tuning policies to provide support for change of value (COV) notification for COV-capable devices. You typically add at least one tuning policy that has its Use Cov property set to True (and possibly with other adjustments). Then, when adding or editing proxy points under these devices, you can specify the use of this (COV-specific) tuning policy.

Tuning Policy Guidelines for N2 Devices