[PLC4X-335] Using single-byte modbus types resulted in unexpected behaviour

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Component/s: Driver-Modbus

Language

java

• Assignee: Christofer Dutz
• Reporter: Christofer Dutz
• Created: 21/Feb/22 12:04
• Updated: 21/Feb/22 20:30
• Resolved: 21/Feb/22 12:08

Description

When reading single-byte values via Modbus, the driver unexpectedly created lists.

This was due to the fact, that in the DataIo module these types were aligned to 8bits and not 16bits as it's the case in Modbus. 

By increasing the reserved field for BIT to 15 bit and by adding a reserved byte to the BYTE, USINT and SINT types we're able to fix this issue.