I am using a weintek HMI screen as a Slave to my PLC. They both commuincate through Modbus/TCP. When connected with a physical network [my organisation network TCP/IP], the HMI screen loses its commuincation with the PLC. And displays some weird values /alarm on the screen. My query is there problem if I operate a ModbusTCP device with DHCP enabled network.
Where my HMI IP address and other param assigned statically.

Thanks
Raja

 

Is your static IP known to the network administrator? i.e. did you pick a static IP that may already be in use by another computer? Disconnect your HMI and PLC from the corporate network and do a ping of your static IP. Lastly, does your HMI or PLC try to use DHCP as a default?

~Ken