Omron PLC CP1W-CIF11 is a communication interface unit designed for the Omron CP1 series PLCs. It provides a serial communication interface that allows the PLC to connect with external devices such as a computer or a serial printer. The CP1W-CIF11 module supports RS-232C and RS-422A/485 serial communication standards and can be used for data exchange and program monitoring.

The CP1W-CIF11 module is typically installed in the option port of the Omron CP1 series PLC, and it enables the PLC to communicate with other devices through serial communication protocols. It can be used for various applications such as data logging, remote monitoring, and serial communication with peripherals.

To use the CP1W-CIF11 module, you need to configure the communication settings in the PLC program using the Omron PLC programming software, such as CX-Programmer. You can set the communication parameters such as baud rate, data format, and communication protocol according to the requirements of the external device you want to communicate with.

Please note that the information provided here is based on the knowledge available up until September 2021, and there may be updated versions or alternative products available. It's always recommended to refer to the official documentation or contact Omron for the most up-to-date information about their products.