Article - CS325200
Modbus error: Bad address in block. | Block range = <address> to <address> in PTC Kepware Products
Modified: 16-Dec-2025
Applies To
- Kepware Server (formerly KEPServerEX) 5.20.396.0 to 7.0
- ThingWorx Kepware Server (legacy) 8.0 to 6.18
- ThingWorx Kepware Edge (legacy) 1.0 to 1.8
Description
- KEPServerEX getting Bad address in block message from Modbus TCP IP Device
- Customer: created a Modbus connection then created the device
- Added a tag got a message Bad address in block| Block range = 30055 to 30056
- User is reading floats 40001-40051 for a total of 26 floats and can read the first 16 floats, beyond that, the remaining data states bad address range
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