a3load is 8051 firmware that can be used for uploading or downloading to EZ-USB RAM (internal or external). It implements the vendor specific command bRequest = 0xA3. The address to download/upload to/from is specified in the wValue field of t

软件，主要用途为学习PLC编程，里面自带学习的图形化教学软件。-Software, mainly for the purpose of learning PLC programming, which bring their own learning graphical teaching software.