下图PLC那个是连接PC的通讯端口？
这个PLC电池没电了程序会丢失吗？
求大佬们解答

这个是我出道之时的高端古董！如果是欧版的可有DOS版软件支持（2000、XP系统）。那个长条盖板里面的就是手持编程器接口，边上那个方口是扩展内存卡槽。

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.