National Instruments BridgeVIEW - Manual (Page 354)

Appendix A HMI Function Reference
BridgeVIEW User Manual A-34 © National Instruments Corporation
historical trends is the tag trend data read from the historical database,
starting at the date and time specified by start timestamp, and stopping at
the date and time specified by stop timestamp or up to max points per
trend, whichever is smaller. If these start and stop timestamp values are
unwired, all the logged data up to max points per trend for the tag is
returned.
timestamp is the date and time for the value.
value is the value of the tag at the timestamp.
error out is a cluster that describes the error status after this VI executes.
For more information about this indicator, see the section
Errors Not
Reported by the BridgeVIEW Engine in this appendix.