Controlling a climate chamber via ModBus Master - Slave

[User002]

Hello,

I have a task to read and controll the temperature and fan speed of a climate chamber (Binder FED 115 E2) via Modbus Master - Slave. The connection between the oven and my laptop is made by a serial cable (DB25 plug - RS232 socket). I have tried to write a simple program that should read the temperature (see the attachment" --> "create_new_slave.vi"). Since, I have been new to Modbus - Master Slave in LabView, I don't know exactly, how it should be implemented in LabView.

As I ran the programm, I get neither an error message nor the temperature (see "frontpanel_read_temperature.png"). I don't know, what is wrong. Can someone (especially who have worked with chambers from Binder) help me and correct my programm? Thank you very much.

[Homy]

I've got the same task... have you had any luck????

[niNickC]

Are you using some kind of modbus library?

I've had excellent success with the 'NI Modbus Library' provided by systems engineering. (not the once in the DSC module).

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

[Homy]

Thank you for the info on the NI Modbus lib. I have installed it.

Where is a list of commands to send to unit to set the temp and receive the temp.

[RavensFan]

You need to look in the manual for your device.

[User002]

Could you please send me your programm or at least the example of it? 

Thank you