I want to write 5 bits to PLC starting with address 1. This is from AC 800M to AB plc via a basic module
I have seen your application.
The problem is with the processing of the blocks.
Please trigger the MBRead and MBwrite at the same time by using trigger FB.No need to process one by one.
In AC800M triggering the blocks at same time will work.
Please verify that your MBConnect blocks get valid output true.
Still if you face problem please share the error no from MBRead and MBWrite block.
If transfer of bit is not working means do Pack(Bc_To_Dint) in the Ac800M side and do unpack in the AB side and go for Word transfer.