RSView Supervisory Edition Installation Guide

12 • LOGGING SYSTEM ACTIVITY• • • • •Examples of message-routing destinationsHere are some examples of how you might choose to route different messages:• You can route messages that contain information about system activity, and warningsabout things that might go wrong, to the local log.This allows a control systems engineer to analyze system activity and performance,and make corrections during scheduled maintenance times.• You can route errors that require immediate action to the FactoryTalk DiagnosticsList, as well as the local log.At run time, if the FactoryTalk Diagnostics List is visible, an operator can alert theplant’s control systems engineer to problems such as tag errors, as they occur.During scheduled maintenance time, the engineer can use the errors, together withwarnings, or information messages recorded in the local log, to analyze operation ofthe system, and then make the necessary corrections.12 • PlaceholderMessage categoriesMessages sent to FactoryTalk Diagnostics are categorized by severity and audience. Toroute messages, specify that a particular destination (for example, the FactoryTalkDiagnostics List) receives messages of a particular severity (for example, Errors), andaudience (for example, Operator).SeverityRSView uses four message severities:• Errors indicate that a process or action has failed. For example, a tag’s value couldnot be written, or an ActiveX ® control is missing.• Warnings indicate that a process or action might not function correctly, or mighteventually fail if preventive action isn’t taken.For example, if an ActiveX control used in a graphic display is a different version thanthe one installed at the RSView SE client, a warning is logged to indicate themismatch. Mismatched ActiveX controls might not behave as expected at run time.• Information indicates that a process or action has completed successfully. Forexample, an information message is logged when a user logs on to the system.• Audit indicates that the system configuration has been changed. RSView also recordsan Audit message:• for all tag writes.12-3