how to operate 3 or more lambda supply

[gireesh]

I need top connect 3 or more Lamda power supply for my project. I made it and the vi is attaching. anybody please correct it or give standered way of integration. 

[Dennis_Knutson]

Your program is controlling a single supply since you only specify one com port. You are also endlessly repeating setup functions. You will need additional VISA Resiurces - one for each com port, place the initialize functions outside the loop, and get rid of the sequence structure.

[Henrik_Volkers]

When I remember correctly, the lambda supplies allow to daisy chain the serial port , so only one RS232 port is needed.

However RTFM (read the manual) on how to setup and address them correctly.

Have you searched this site for a driver and tried it?

For example this one

http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=6855

[gireesh]

hello dennis

I have nine lambda power supply, each one is conected through RS 485 interface. But in the starting power supply it is to be set as RS232. I controlled this nine power supply like this.it will communicate, sure!

but i need to know that, this type of configuration is correct or not. I mean any standerdisation etc. As per your reply ,I mean that there is nine com port is required, isn't?

But it is not practicable.

I need to correct my progam

[Henrik_Volkers]

You will only need one RS232 port to control all lambdas!

Have you tried the NI lambda driver?

How did you setup the supplies?

It's a good idea to start with one supply only to gain experience, then add a second and finally the rest.

I can't remember (it's more than 8 years ago 😉 ) if lambda had an extra documentation for the serial communication (check out) , but I remember that everything need to control them was documented and it took me only one day to implement it into a test system.

[gireesh]

please check my question and attachment

[gireesh]

Hello sir,

I can explain

1. In my system there is two serial ports are there

2.In the lambda PS there is two RJ45 connectors are there. one is named as IN port, it is connected to PC  and the other is OUT port, it is connected to the second instrument IN port (like PC to IN, OUT to second lamda IN , OUT to third lambda IN)

3. In lambda PS manual they says that two type of integration

        a. Pc to lambda - through RS232 means in the instrument set the remote action is RS232(RJ45 to serial connector-9pin)

        b. lamda to lambda - through RS485 means in the instrument set the remote action is RS485(RJ45 connector)

From this we can know that it is to be connected serially. that is as per the attachement in the first post.

the drivers are downloaded from NI and this drivers will work in LV6.1 RTE.

How it will configure?, I made it and it is attached in the first post, I saying that please correct it

It is working fine!!!!  My doubt is second lambda  initialise palette is connected in between the palette is it correct or not. Again I am remembering you that it is working fine.

awaiting your replies

thank you

[Henrik_Volkers]

While I don't have the lambda.llb here what I found inyour code (with blank subvis.....)

Init the port once before entering the read loop and close it once after the loop has finished!!

I am pretty shure that you will need some sort of adressing, since you have more than one device on your serial BUS .

If I remember right, it is well described in the manual...  you will have to do a setup at each device to an individual adress. This adress is part of the command that is send out to the bus.

Your cabling seems to be OK. BUT AGIAIN: You have to configure the lambda devices to individual adresses!!