Reading Commands from SoMachine Software

[saraqu02]

I'm working to possibly control a Schneider Electric M258 Logic Controller with LabVIEW. I was planning on using SoMachine software (to connect directly to the PLC) to access the command code libraries that the logic controller uses to alter heaters, pistons, etc. Then, I would employ those command codes through various sub-VIs in LabVIEW to have the ability to control those heaters as well. After speaking with a Schneider Electric representative, he does not think LabVIEW will be able to employ these command codes to communicate with the logic controller. Has anyone used SoMachine before? Anyone think why LabVIEW would or would not be able to control the logic controller with those command codes?

[nyc_(is_out_of_here)]

How exactly were you planning on "reading" from the SoMachine software?

[saraqu02]

If my research funds allow, to buy SoMachine 4.1, which should give me access to the command code library. To send commands and read results, I thought I might use Instrument I/O Assistant in LabVIEW.

[Dennis_Knutson]

From what I read, you would need a sniffer to determine the actual commands that the vendor's software sends to the plc and then you would replace the vendor's software with LabVIEW. If the plc uses something like Modbus, the assistant will not do it.