V-BELT 5166103 - Caterpillar

Table 1
Present This state is only applicable to the genset control log. Present means that the condition that caused the event is still present. The condition must be addressed before the event can be reset.
This state only applies to EMCP events. Other modules will not have present in logs.
Active The event was previously in a "Present" state, but it is no longer present. It has been latched by the event system and needs to be reset before the engine can be restarted.
Within the Genset Control Log, the condition that caused the event is still affecting the system, but may be reset. Warning type events automatically reset when the condition that caused the event is resolved and will never be Active.
Within any log other than the Genset Control Log, the condition that caused the event is affecting the system. The event may, or may not, be resettable. If the Reset All command fails to reset the event, then this event is still occurring and must be resolved before the event can be reset.
Many events go from present to active when the engine is shut down and may reoccur once the engine starts running again. Further action may be required to resolve the issue.
Inactive The event has happened at some time in the past but is no longer affecting the system. Inactive events are stored for historical purposes only.