Modbus communication between a S7-300 and a PC

Gromit

Member
Join Date
Jun 2006
Location
-
Posts
119
Hello,

How can I establish a modbus communication between a PC and a S7-300. The PC should be master and the S7-300 slave.
For the Simatic I'll need a CP341 WITH RS422/485 and a SIMATIC S7, MODBUS SLAVE V3.1 SINGLE LICENSE.
What do I need for the PC side?? A PC card?? A modbus softnet? Do we have a modbus softnet?? I'd like to read the PLC data on Visual Basic 6.0

Thanks in advance
 
Hello Gromit;

On the PC side your program will have to control your COM port (you will attach a RS-232/RS-485 converter to this port) and implemet Modbus master code to read/write to the PLC data areas.

On control.com there is a link to the Modbus user area, you could look for /request code samples for your application.
Hope this helps,
Daniel Chartier
 
Do we have a sort of a Siemens OPC server for Modbus.
I'd like to do it the easiest way. We could use MS Excel, for viewing the required data.
 
Modbus communications between S7 and PC

We manufacture a product called DeviceMaster UP, which offers the ability via patent pending dual connect plus mode, to communicate via Modbus to/from the PLC, and via TCP/IP to the PC.

The size restrictions for files do not allow me to post the pdf I have that illustrates this.

If you'd like any additional information, please let me know.
 

Similar Topics

Good day Programmers I have a RSTi-EP CPE100 Standalone Controller from Emerson as well as a STXMBE001 (MODBUS TCP/IP) as a Modbus communication...
Replies
0
Views
623
Hey Guys, I am struggling to read data from a "JUMO" make controller using modbus RTU with MLX1400. The communication between the devices has...
Replies
18
Views
5,037
Hi All, I am using an Accuenergy Data Acquisition Server (https://www.accuenergy.com/products/aculink-810-data-acquisition-gateway-server/) to...
Replies
9
Views
2,627
we use M580 which have an Modbus RTU port correct if iam wrong now should i have to read input data from ab micrologix through read var block and...
Replies
0
Views
1,838
To execute MODWR and MODRD instruction of Delta PLC, I need address of register in VLT 2800 but I cannot figure out. Can any body help me? I want...
Replies
7
Views
6,953
Back
Top Bottom