### Setting of External Device

Open the controller properties dialog box from the ladder software and set in the [Serial Port] tab, then in the [System Protocol] tab as below. Please refer to the manual of the External Device for more details.

##### [Serial Port] tab

Setup Items | Setup Description
--- | ---
Mode | System
Control | No Handshake
Baud Rate | 19200

##### [System Protocol] tab

Setup Items | Setup Description
--- | ---
Protocol | DH485
Max Station Address | 31
Token Hold Factor | 1
Station Address | 1