Does the TP177A support Modbus RTU ?
If so, it could be a way. But it requires an additional license in the CX as far as I know. And it will be most cumbersome because you have to map the tags as modbus registers.
Another way could be to switch to a panel with an ethernet port, and use Modbus TCP.
Even the cheap TP177-4 supports Modbus TCP.
Again, you need a license in the CX.