今年上半年我为现公司一款流量计产品编写的上位机Modbus通讯程序（下位机程序也是我用C编写的，由于受到法律许可限制，在此不能上传，不过在将来我会把设计思路传上共享），包括自创的Modbus协议的Delphi实现及其完整调用，还有一份我编写的该产品的完整的Modbus协议说明书，非常有参考价值。,First half of this year the company I am now prepared a flowmeter products PC Modbus communications p

使用此程序通过PC串口1读取电磁流量计（IFC300 ）的瞬时流量和累积流量-using this program to communicate with flowmeter(IFC300) which is connected with PC com1,get the trnasient flowing value and the accumulate flowing value.

模拟天信仪表自定义协议，用于天信智能流量计通讯调试。-The analog the day letter instrumentation since defined protocol intelligent flowmeter communication debugging for the days of the letter.

vb编写的串口通信上位机软件，超声波流量计，浮点描点画图程序-vb serial communication PC software, ultrasonic flowmeter, floating-point descr iption point drawing program