Remote Logging

The network-centric nature of Ignition offer a large amount of flexibility for building highly distributed systems. One common task is to gather data from remote sites and record it centrally, for easy sharing and additional analysis. There are several ways to accomplish this in Ignition.

OPC-UA Only

OPC-UA is a network-based specification, and is ideal for collecting data from remote locations. Installing Ignition with only the OPC-UA gives you the ability to connect easily and securely from any number of other Ignition installations, or with other OPC-UA clients.

This method only exposes data, however, and the client side must then record it if historical data is desired. If the connection goes down, data will not be available. This method offers the lowest cost, and is suited for situations where the data is not highly critical or historical- for example, remote realtime monitoring.

Remote SQL Bridge

By installing the SQL Bridge module in the remote gateway, you benefit from the store & forward system to ensure that no historical data is lost. The system may still be access through OPC-UA as outlined above, or database-based SQLTags may be used to communicate current status. By doing this, it is possible to use SQLTags Historian and alarming, both of which utilize the store & forward system to avoid data loss. This method is ideal for historical data.