# Changing the Offset

1. In the To Controller section, type the offset of the fieldbus map within the Process Data Frame.

2. In the From Controller section, type the offset of the fieldbus map within the Process Data Frame.

Validation is done automatically. If the new offset value is accepted, it is shown in black text. If the value is not accepted an error message is shown in red text which provides information about which offset rule that is violated.

The start address must be an even number.