Not sure I understand what are you trying to say?
There are two things here
- writing individual bits to holding registers, via modbus. Currently not supported in the modbus binding without the workaround documented by @rossko57
- logs having EOF ERRORs on read on first try, but successfull on second try. This is a low level issue with the serial library used by the openhab, or the an issue the way the serial library is used in modbus binding. So far (with binding > 1.9.0) I have seen this happening with windows.
For the interested, I discussed the implementation here as well.
Best,
Sami