BCB编写控制软件Provade读写s7300数据的程序 经调试后通过 主要用于300和上位机数据交换量不大 通讯实时性要求不高的场所-BCB prepared Provade control software to read and write data s7300 procedures adopted by the debugging mainly for 300 and PC data communications in real-time exchange capacity of not