Article - CS299224
Modbus device readings show wrong values in PTC Kepware Products
Modified: 15-Apr-2025
Applies To
- Kepware Server (formerly KEPServerEX) 5.20.396.0 to 6.17
- ThingWorx Kepware Server (legacy) 8.0 to 6.17
Description
- Modbus device readings show wrong values in KEPServerEX / ThingWorx Industrial Connectivity / ThingWorx Kepware Server
- Read value with more than 16 bit word or dword shows wrong result
- How to swap word order in float reading
- Modbus TCP/IP Ethernet register shows different value than expected
- Modbus shows different values in QuickClient than expected
- How does one change the byte swapping and endianness of a modbus tag within a device?
- The values I read from KepWare do not match the values on the PLC using Modbus TCP/IP Ethernet driver
- Float values not read correctly while other applications like Modbus View can read them as reverse Float
- Modscan data seemed to have been aligning actual data but not Kepware Server data
- Modbus float value is not showing correctly and need assistance to fix this
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