Hello to everyone! I'm trying to control the SANWOOD climatic chamber which uses a TCP/IP communication protocol, but every time I try to send a message I get error 66. Can anyone help me understand why? I attach the VI and the example message. Thanks

Normally this error is when saturate the communication port, Slave/Master can close the communication if it have a lot data. due to size limitations of the Modbus protocol data unit. In this case you should separate the data array in portions to send it. EX: In Write Multiple Coils VI a maximum of 1,968 coils can be written at once.