Hello,
I must apologize; I failed to mention that I had a 1747-dps2 (port splitter) also tied into the 1761-net-eni.
The dps2 has the ml1500 and maples blue series HMI tied into it. Where I went wrong was I did not have the comport set up for DF1 full-duplex. Thank you for your time and sorry for the trouble.