We are looking at using the Twido Compact 16 Pt modules that come standard with 1 serial port. I would like to set up an RS-485 multi-drop connected to a Modbus TCP to Modbus RTU bridge (Lantronix type). Has anyone tested a similar configuration? We would like to be able to have a SCADA solution like Wonderware be interfacing Modbus TCP to the PLCs and be able to simultaneously access a PLC on the multi-drop using TwidoSoft. Also, what's the deal with the mini-Din connector? Do they make a mini-Din to terminal adapter or something that will make an electrician's job easier when setting up the 2-wire RS-485 multi-drop? I understand that if you get the 2nd option port they have an adapter that has screw down terminals on it.

Thank you in advance for any help!

 

If you want to use the Wonderware Modbus TCP driver, you may want to make sure that the Lantronix device preserves the modbus portion of the data packet. If not you may want to take a look at the anybus bridge http://www.anybus.com/eng/products/abxoverview.asp

Also, Modicon has a modbus to ethernet bridge part #174CEV30020

Have a good one

Mike demkowski
[email protected]

 

We have used Twido PLCs with:
http://pvbrowser.org

The cable is for converting RS485<->RS232.
It can be used with TwidoSoft or for
Modbus communication with this PLC.

 

I will recommend you to use either the Twido compact controller TWDLCAE40DRF. it comes with the Modbus TCP/IP interface onboard or use the TWIDO Modbus to TCP/IP interface 499TWDO1100 (this includes cable between the gateway and the Twido controller).

regards,
Henrik

 

Hello. did you ever get the Scada to interface with the twido? we have been happy with the twido controller, but now we need to find a scada software that will work with twido. Your question was posted in March and I was wondering what solution you settled on.

Jeff

 

jeff.

i am also having trouble trying to interface a twido TWDLCAE40DRF to a scada system. This model has the in-built network connection. For some reason i cannot get the correct setting on the tags on our Scada system (citect ver6). For example Input 1 on the PLC is named %i0.1 inside the plc, but then i put that value in to citect, i keep getting errors. Have you had any luck doing this???

Dan