Hello, thank you all for your answers, to describe a little more about my application, through the JZ20-J-R31 PLC (in charge of managing some motors and having some variables with the status of each motor that it commands) together with the card ethernet mj20 et1 I want to connect with a gateway through the Modbus TCP protocol to pass the data of the status variables and monitor the status of the motors online, in the cloud (very similar to a scada but on a smaller scale and more simple without control, only monitoring), so my question is, the PLC would work as a Slave and the gateway as a master, if I want to read the marks from M20-to M50, can I select somewhere this range of variables so that I can do it? read from the gateway, or would it depend on the gateway's configuration to read the variables I need. Thank you I hope I have been clear with my application, I have attached the configuration I have so far.