Does anyone have any experience in getting data from a TI 545 serial port onto Modbus TCP? I dont know what the protocol is on the TI545. I have a Lantronix UDS-10 tunnel/gateway, but do not know what the TI protocol is to even begin. Any leads would be great.

Ras

 

Actually 3 years ago when I job doing integration work, I developed a 984-ladder logic program which uses the XMIT block in a momentum processor
which polls Vmemory locations in the TI/Siemens-545 Processors. The information from the TI-545 is stored in some preassigned 4xxxx in the momentum. In the application I developed this data was then transferred over MB+ using peer cop. However, I think it would be also quite easy to adapt the code to then transmit it out of an M1E ethernet port instead.

If you are interested you can contact Square D's IAT (Industrial Applications Team)in Raleigh, NC.
Try Tim Hince at 919-855-1190.

 

You can find Modbus serial interface adapters for the TI505 series controllers at "www.controltechnogy.com":http:www.controltechnogy.com and "www.siemens.com":http://www.siemens.com .
You can find a Modbus serial to Modbus/TCP bridges at "www.modicon.com":http://www.modicon.com ,
"www.controlmicrosystems.com":http://www.controlmicrosystems.com , "www.niobrara.com":http://www.niobrara.com , "www.gefanuc.com":http://www.gefanuc.com , et al.

The combination of a Modbus serial adapter and a Modbus serial to Modbus/TCP bridge will definitely solve your problem.

I do not know of any Modbus/TCP module that you can plug into the the TI, but if anyone has it, I think it would be Control Technology.

The serial port(s) on the TI5x5 CPU use NITP protocol. Knowing about NITP won't help in your endeavor, but if you're curious, I recall that you can find the nuts and bolts of this protocol spec in the TI Unilink Host Apapter Users Guide/ Manual, or whatever the exact name of this
book is, at "www.siemens.com":http://www.siemens.com .

If you're trying to go from a TIWAY NIM or network of NIMs to Modbus/TCP, I suspect you're going to get into some very unprofitable R&D work.

You have a Lantronix gizmo, good, but I think it's the wrong one. The UDS-10 is a serial tunnelling device and would support a host's virtual serial connection over Ethernet to a Modbus ASCII slave, it may or may not work with Modbus RTU protocol, anyway it's not Modbus/TCP ready. I suggest you call Lantronix to sort this out, their CoBox would be the more appropriate part for this application.

Jay Kirsch

 

With regards to NITP, newer TI PLCs also support transparent byte protocol or TBP that you can read about on Siemens' web site.

I would steer towards Control Technology (CTI), they make a module with a part number 2573. It has eight serial ports with a Modbus capability.

If you want to go Modbus/TCP, then you will have to wait a few months for the new CTI Ethernet adapter. It will have some sort of OPC-DX/DA
capability.

The current CTI Ethernet card does not support Modbus/TCP, you would have to use OPC and C or something like that to get back to Modbus.

I have not used the new Siemens Ethernet adapter, but I doubt that it supports Modbus. More likely to support PROFInet, but perhaps not even
that.

RA

 

Hi Jay,

One could use an OPC bridging product and two OPC servers, one for Siemens Simatic 505 that support TBP and the other for Modbus TCP. Then simply
bridge the data between the two units using the OPC bridging software. There are a couple makers of this type of software, and yes we are one of
them. We have the 505 driver both serial (NITP or TBP) and Ethernet (CTI 2572) in addition to the Modbus TCP driver. To tie everything together
there is our OPC LinkMaster product that bridges OPC servers like these. Just a thought.

You can download these pieces from our web site and try it all out for free.

Mark Hensley
President
Kepware Technologies
81 Bridge St.
Yarmouth Maine 04096
PH: 207-846-5881 ext. 202
Fax: 207-846-5947
WWW: http://www.kepware.com