这是自已编写的松下串口读写数据，主要功能是写位，读位，写字，读字。一个用LabView编写的，一个是用的C#编写的。



弱弱的问一下，松下PRO7软件变址如何使用的，松下PRO7资料不怎么好找，求老师傅指点一下。本来擅长日系PLC，虽然西门子200，PLC1200博图也用过，但还是不能融汇贯通，所以遇到松下欧系编程风格的PRO7还有点吃力。

下面一段
                string c, d;
                switch (tbPlcPointAdress.Text.Length)
                {
                    case 1:
                        c = "000" + tbPlcPointAdress.Text;
                        break;
                    case 2:
                        c = "00" + tbPlcPointAdress.Text;
                        break;
                    case 3:
                        c = "0" + tbPlcPointAdress.Text;
                        break;
                    case 4:
                        c = tbPlcPointAdress.Text;
                        break;
                    default:
                        c = "0000";
                        break;
                }
直接改为
               string c, d;
               c = tbPlcPointAdress.Text;
               c = c.PadLeft(4, '0');
就行了