Modbus TCP/IP maximun read size.

[javcursor]

Hello,
I am developing an application that uses modbus tcp/ip. I only use holding registers. I write 10 registers and I want to read 110 registers. The maximum information packet for standard modbus is 128 word. I am using the modbus slave/master of Qt 5.7 and I only can read 62 registers with an higher number I get error.

The number of registers that I want read has been changed in slave and master. I am using readandwrite request and I also have tried readrequest with the same result.

Is it a internal restriction? Can I change this limit?

Thanks,
Javier

[javcursor]

For more information visit:

https://bugreports.qt.io/browse/QTBUG-54834