Interface AC power source

[naman25]

I have recently bought an AC power source from LISUN GROUP (LSP-500VAR) as i tried interfacing it with labview the device was not responding but when i used the system given software( which is not on labview) it was working. It is communciating using Rs232.

Please help

[mikeporter]

Does the manufacturer have a manual that tells you how to use it via RS232?

Mike...

[naman25]

the manufacturer has given communication protocol for various operations.

The manufacturer has not provided any drivers for the device will that cause a problem in communication.

Thank You

[GerdW]

Hi naman,

start with the "Basic Serial Read and Write" example VI coming with LabVIEW.

Send commands as described in your manual and check devices answers according to your manual…

[naman25]

i tried the same, i am attaching the pic of the block diagram kindly let me know if there is error, the problem is the device is not responding or giving back data

[GerdW]

Hi naman,

when the manual states "send byte 0x15" you need to send exactly that byte. Right now it seems you send 4 bytes "0", "x", "1", and "5" which is wrong!

Set your string constants to "hex display" mode and input the needed byte values then!

Setting a timeout of 1000s (or >16min) is also not recommended…

[naman25]

i tried the same but still no communication, will it play any role if we dont have the device drivers for the device as the company is not working in labview

[GerdW]

Hi naman,

as long as you have a (good) programming manual you can write your own device driver VIs.

You only need to know the exact parameters of the communication protocol!

[billko]

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@GerdW wrote:

Hi naman,

when the manual states "send byte 0x15" you need to send exactly that byte. Right now it seems you send 4 bytes "0", "x", "1", and "5" which is wrong!

Set your string constants to "hex display" mode and input the needed byte values then!

Setting a timeout of 1000s (or >16min) is also not recommended…

---

I'm going to add that the "0x" isn't part of the code you should send.  That's just telling you that the following number is a hex number.

[Dennis_Knutson]

Please attach the manual and an image of your current block diagram. You also need to make sure that the vendors software is not running.