Rule number simply tells you where you're at on the list of register maps. Click "next" and "prev" to scroll through the list. To advance directly to a specific map, enter the desired number in the "Showing" box, then click Update.

Rules entered on this page only read data from remote devices. Go to the RTU Write Map to write data to those devices. If the local object number is shown in parenthesis, it means that object is already mapped in the RTU Write Map.

For each remote register to be read, enter the register type, format, register number, and unit ID. If this is a double register, you have the option of selecting the register swapping. The remote register will be stored at the local object number shown. Poll time is shown in the RTU Device page.

Selecting "none" for remote type will skip that rule and generate no communication activity.