Writing to Red Lion PLC via Modbus

[dkhayes117]

As long as the tag has Read Only False, then I can’t imagine why it wouldn’t write if the tags are correctly reading.

Maybe check into this

Red Lion Data Converter DA30D outputs not switching

I would check the configuration in the RedLion. We typically use them to pass tags directly between devices, but we also typically set them up for one-way communications. It's possible it's rejecting writes to those tags because it simply can't write back depending on the config.