下圖PLC那個是連接PC的通訊端口？
這個PLC電池沒電了程序會丟失嗎？
求大佬們解答

The CPU is equipped with one connector for peripheral devices. A peripheral
device, such as the CPU-Mounting Programming Console, can be mounted
directly to the CPU and does not require a connecting cable. To mount the
CPU-Mounting Programming Console or any other peripheral device directly
to the CPU, follow these steps:
1. Detach the cover of the peripheral device connector with a standard
screwdriver.
2. Connect the CPU-Mounting Programming Console to the peripheral device
connector.
3. To ensure a positive connection, secure the Programming Console to
the CPU by tightening the mounting screws located on the surface of the
CPU.