# Device Addressing – Selected Device

The Selected Device column of the Device Addressing tab defines the Mitsubishi PLC/MC device that is used to read or write the data block. Depending on the configured data block and the PLC/MC device selected on the Settings tab, the drop-down list may include the following options:

PLC Series | Block Name | Available Devices
FX Series | Control or Status | None X - Input Relay Y - Output Relay M - Internal D - Data Register R - Extension Reg
Input Block or Output Block | None D - Data Register R - Extension Reg
iQ-Q Series | Control or Status | None X - Input Relay Y - Output Relay M - Internal L - Latch Relay F - Annunciator B - Link Relay D - Data Register W - Link Register R - File Block Reg ZR - File Register
Input Block or Output Block | None D - Data Register W - Link Register R - File Block Reg ZR - File Register

The default value is None for all data blocks.