Is there a way of upgrading our HC900 C50 Version 1.0x to a higher version to take advantage of its features w/o changing the cpu? I've always come across with a readme file w/c seems great with the correct firmware version to upgrade 1.0x. The HCDedigner software to configure the controller were upgraded to version 4.4 and comes with several firmware version upgrade in one of its folder (HC900 firmware w/c includes upgrade v2.3 & up). Which version should I use to upgrade our 1.0x version? could it be used as modbus RTU on the process of integration with 3rd party HMI? its port seems not configurable to RS 232 & 485 and its ethernet port is set to honeywell ELN and not modbus TCP. Hoping to receive any reply as advise to this situation.