Yes, TP04 series text panel supports Mitsubishi RS-422 communication protocol. Please refer to the following steps to perform the setup: 1) Open the battery cover on the rear of TP04 series and the users will see an 8-PIN DIP switch on the left side of the battery. When using RS-422 communication protocol, please turn the switch to RS-422 mode. 2) Select FX Series or FX2N Series when enter Set Device Type on TPEditor software. 3) Set communication port as COM2 and use Delta standard communication cable, which part number is DVPACAB630.