Article - CS427915
How to resolve DataLogger Monitor Item and Log Group Item value mismatch in PTC Kepware products
Modified: 27-Sep-2024
Applies To
- Kepware Server (formerly KEPServerEX) 6.0.2107.0 to 6.16
- ThingWorx Kepware Server (legacy) 8.0 to 6.16
Description
- When a DataLogger monitor item is used as the trigger and also included in the log group items, the value inserted into the table for that item is duplicated with the previous value in the PTC Kepware products
- The value is not identical for both the trigger monitor item and log group item when inserted into the table
- Tags in the Data Logger plugin are treated like client items and grouped into buckets based on their update rate
- Different update rates cause tags to go into different buckets, which are not guaranteed to be in synchronization
- Faster tags may read old values while slower tags may read new values, causing mismatches
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