PC and PLC communication problems-CodePudding

I am in a software using VB to do, now need to implement directly read data from the Siemens s7-300 PLC function, seek expert advice what should I do

CodePudding user response:

http://bbs.csdn.net/topics/391890671

With my the MODBUS

CodePudding user response:

reference 1/f, stupid dog flew first response:

http://bbs.csdn.net/topics/391890671
With me of the MODBUS

Hello, excuse me if I want to direct communication with PLC, will attach you with the code I use vb to do, a software program to be good? I'm sorry, but I know not much, so a lot of place all don't understand the

CodePudding user response:

If this is really what you said, even problem is very big, this is not posted once finished
Under the PLC is a Modbus function block, it is necessary to define the Modbus registers, stand, also need to define the communication parameter
VB under the need to define the communication parameters, function code, the station number, management handle to a serial port

CodePudding user response:

I now use the Siemens s7-300 simulation software, hope to be able to read data from the simulation software, a great god, if you know can give me advice specific steps? I don't know to PLC and vb, but subject to complete the deadline is coming

hope god can give directions

CodePudding user response:

Really, I'm sorry, but I learn c #, not the VB, can't help you anything,

CodePudding user response:

Actually has nothing to do with language platform,

If your PC has a serial port, then using the RS - 485 communication protocol is one of the most simple, have a look at this information,

CodePudding user response:

PLC manufacturer may have data collection code, can go to the website search

CodePudding user response:

Look at this article:
http://blog.sina.com.cn/s/blog_16d7d3ecb0102x1z5.html

CodePudding user response:

PLC supplier or network where there is sample, can go to have a look

CodePudding user response:

16 years burial-ground beside be dig out