Article - CS281555
Error "Unable to read bytes[...] Device returned data access error [Code=0x05]" using Siemens drivers in PTC Kepware Products
Modified: 30-May-2024
Applies To
- Kepware Server (formerly KEPServerEX) 5.20.396.0 to 6.4.321.0
- ThingWorx Kepware Server (legacy) 8.0 to 8.2
Description
- Reading data from a data block results in an error that causes all registers in the block to be invalidated and the quality to be set to Bad
- Error message in Event Log:
Unable to read bytes '<bytes>' starting at offset '<offset>' for Data Block '<address>' on device '<device>'. Device returned data access error [Code=0x05]
- Affects the following item syntax:
-
DB[num],B[address][.bit]
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DB[num],BYTE[address][.bit]
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DB[num].DBB[address][.bit]
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DB[num].DB[address][.bit]
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