modbus

[seb123456_1999]

Dear Sir, Madam,

I have a machine TLM2 (engine control device) plugged by TCP/IP port. This device has the following modbus commands are supported by TLM2 .

Read Holding Registers (0x03) :	Read access on one ore more subsequent word registers.
Write Multiple Registers (0x10) :	Write access on one ore more subsequent word registers.

I would like to know how should I proceed to command this device using Labview.

Best regards,

Sebastien Champemaud

[unclebump]

You could start with the NI modbus library for a small amount of data.

https://forums.ni.com/t5/Reference-Design-Content/LabVIEW-Modbus-API/ta-p/3524019

If you want to access hundreds of registers, I would recommend the NI DSC module.

https://www.ni.com/en-us/shop/product/labview-datalogging-and-supervisory-control-module.html

[JTerosky]

Attached is a small vi using the MODBUS library.  It accesses a Serial MODBUS device.