Denilson,

When I try to open the file, after downloading, it gives me a File damaged error message. What am I doing wrong? I am definitely interested it viewing it as I've been working on a problem with the two latest installations after Siemens changed the MB Server block.

Thank you in advance

 You should extract the zip file and then open the extracted folder and then try to open the project.

That may work.

Thanks,

Jay

co67

Denilson,

When I try to open the file, after downloading, it gives me a File damaged error message. What am I doing wrong? I am definitely interested it viewing it as I've been working on a problem with the two latest installations after Siemens changed the MB Server block.

Thank you in advance

HelIo, 

I want to make a communication between PCVue(SCADA Software) and S7 1200 using Modbus TCP/IP Protocol,

I want to read from the PLC and write to the PLC using PCvue , I already did this with WAGO PLC using CodeSys, It was easy just declaring the variables  in Global variables section and giving modbus Addresses to PCvue  .

can anyone suggest any solution .?

Thanks in advance!

Hello Evereyone

I am having one masibus 85xx+ scanner. I want the plc (s7 1200 cpu1214c) to read temperature values. I have used MB Client instruction in programme but showing error 7006.

The scanner communicates via modbus TCP/IP interface.

I am enclosing a zip file containing pic of scanner settings and the v13 programme that i have made. 

Pls help, its urgent 

Thanks

 Request you to share these Modbus TCP examples with TIA V14.

Denilson Pegaia

Hi,

Here there are a sample project and some tips for implementation of MODBUS TCP with S7-1200:

1 - Pre requisites: STEP 7 >= V11 SP1 and S7-1200 FW >=2.1

2 – Documentation: the help on line of the blocksMB_SERVER and MB_CLIENTare the best way to get information about these blocks.

3 – Programming:

3.1 – On MODBUS TCP server

Use MB_SERVER instruction on the server:

Ports: as default you can use 502, however it is possible to use any ELSE ports already
used by S7-1200 (20, 21, 25, 80, 102, 123, 5001, 34962, 34963 and 34964).

Each connection needs a block call (with different instance DB, ID and port)

3.2 – On MODBUS TCP client:

Use MB_CLIENT instruction on the client:

Each connection need a block call (with different instance DB). ID and port must match with the server).

4- Status 7002 = meaning that there is no client connected.

 

 

NOTE: As from CPU FW4.0 / STEP 7 V13 SP1, the blocks MB_CLIENT / MB_SERVER was changed.

Now they are similar to S7-1500. The main difference is that now the connection definition is not made in block inputs but else in a external place (DB).

 

To create the connection reference DB, create a DB as usual, and as variable (any name) you should type (manually) as data type “TCON_IP_V4”.
The blocks online help shows the meaning of the variables.

I attached now two examples at one zip file: one for FW>4, other for FW<=3 (as original)

In the post of 28/04/2018 I place a V15 project version + cast showing the project steps.