# Deleting a Modbus RTU client

A Modbus RTU client can only be deleted by deleting the associated UR20-1COM-232-485-422 I/O module.

Deleting a Modbus RTU client deletes all subordinate servers as well. It also deletes all data items associated with these servers including their mapping to global variables.

1. Open the device view.
2. Delete the UR20-1COM-232-485-422 u-remote I/O module that contains the client.

Deleting a u-remote I/O module