A Field Device that is periodically logging a counter value is required to reset the counter to zero after the current value has been logged at the end of the period. Any other event log for the counter point does not affect the counter value.

Technical Bulletin #45 updates the WITS-DNP3 technical documentation with details of the Incremental Configuration record to configure the counter point(s) to behave this way. It also shows the updates to the WITS PSA Test Specification and the Device Profile XML suite.

This new feature has become part of the WITS-DNP3 protocol version 2.1, and thus is detailed in release pack 5 as documented in TB#42.