Article - CS333022
Support for 64-Bit Integers in the OPC XML-DA Client Driver
Modified: 02-Nov-2020
Applies To
- Kepware Server (formerly KEPServerEX) 5.19.467.0 to 6.8
- ThingWorx Kepware Server (legacy) 8.0 to 8.4
Description
At this time, the XML-DA specification supports 64-bit integers, but the OPC DA specification does not. Since the OPC XML-DA client is a driver in the OPC DA server, any 64-bit integer in the XML-DA server that is accessed will be reported as Bad quality (along with no value for any client application that is connected to the server).
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