plc.myforum.ro

mojo · Senior Joined: 01 Oct 2011 Posts: 2404

I would like to know how to configure a cx1020 with Weintek HMI (or any other HMI in general)
I would also like to communicate the HMI with the PC having TWINCAT installed for offline simulation purpose. So how do i configure the connection between the Twincat (on Pc) with the HMI software?

Thanks.

rott · Senior Joined: 23 Aug 2011 Posts: 2266

Hello Mojo,
In genaral you have three options:
1. The HMI has an ADS driver.Easy.
2. Using a standard driver like ModbusTCP or ModbusRTU.
3. Using an OPC.

You can also purchase Indusoft Web Studio for HMI, which is one of the least expensive choices and is also fairly modern (object design, etc).
It interfaces natively with TwinCAT, rather than the generic OPC interface
which need a little more experience.

mojo · Senior Joined: 01 Oct 2011 Posts: 2404

Hi all,
We have CX1020(WinCE, TwinCat), laptop(WinXP, TwinCat v2.11.0) some input, output modules. All is normal. It is working.

I tried to use that example. I loaded from beckhoff.com TCP/IP server project(TcpIp_SERVER.pro), Visual Basic client project (VBSample01.exe), TcpIpServer.exe and TcTCPIPSrvCE.exe

I installed TwinCAT TCP/IP Server (TcpIpServer.exe or TcTCPIPSrvCE.exe), Library(TcBase.lib, TcSystem.lib, TcpIp.lib, Standart.lib)

Laptop connect to СХ1020-0111(Ethernet-Port X01)
IP CX1020 10.1.1.6; IP laptop 10.1.1.7

opened in 'TwinCAT PLC Control' project TcpIp_SERVER.pro
in MAIN(PRG) wrote sLocalHost := '10.1.1.6' (IP CX1020 10.1.1.6)
compiled TcpIp_SERVER.pro (0-Errors, 0-Warning) and downloaded to CX1020.

do run cx1020 and run Project1.exe(Visual Basic client project)

In client write ip 10.1.1.6 (ip CX1020) port - the same like nLocalPort in MAIN(PRG)

after try connect to server in Visual Basic client project(laptop) i see message 'Client Error:10061(Connection is forcefully rejected)'
It's meaning no connection...

What I did wrong and what I did not? May be someone, can explain.
Thanks

rott · Senior Joined: 23 Aug 2011 Posts: 2266

mojo · Senior Joined: 01 Oct 2011 Posts: 2404

Anyone have experience in modbus TCP? I try to read a modbus TCP address 304096 from twinCAT, but have not yet success. Please help with sample program or guidance. Thanks

rott · Senior Joined: 23 Aug 2011 Posts: 2266

Hi,
Do you use the Beckhoff device as Modbus TCP server towards another Client? Is it a CX or BC or another Beckhoff system?
If I take a CX9010 as example the 304096 address could mean 3xxxxx Input Register (Input Area, I) and the address to read is 4096 dec (1000 hex). If so, with function code 4 you read the input register.
To be able to use the CX9010 as Modbus TCP Server the TwinCAT Supplement Modbus TCP Server (CE) needs to be installed
Rott

mojo · Senior Joined: 01 Oct 2011 Posts: 2404

Hi Rott,
Currently I am trying to use a PC with twincat as a client to read from a IFM ASI modbus controller. The 304096 is a adress from IFM ASI modbus controller.

rott · Senior Joined: 23 Aug 2011 Posts: 2266

Hi Mojo,
When using PC with TwinCAT as Modbus TCP Client, you need to install the supplement TwinCAT Supplement Modbus TCP Server anyway. The Modbus ADS server enables communication with a Modbus device (Modbus server) via ADS and a MODBUS/TCP connection.

http://infosys.beckhoff.com/content/1033/tcmodbussrv/html/TcModbusSrv_Client_Overview.htm

Use different function block depending on what function code you need to read/write to. Function block FB_MBReadInputRegs uses Modbus function code 4 to read Input Register (word).
The adress to read from will in your case be 4096.