I want to use a DIGI One IAP to Ethernet enable a C200H CPU01 PLC. The PLC has a LK201-V1 hostlink unit connected to an HMI. So I want to use port 2 (DB9) to connect to the LK201 and port 1 as pass-thru to the HMI. Are there any issues? considering its a really old PLC and serial unit. I want to access the "D" memory to read/write some tags in KEPserver. Thanks in advance.