How to connect QL355TP Power Supply

[Spacecowboy]

Hi
I have exactly the same problem could you explain what you did to resolve the problem.

    Thank you Gary

[Graeme Smith]

Hello Gary

I phoned TTi repeatedly with the problem and they resolved it by rewriting the drivers for the device.  I am sure if you give them a ring and ask for technical assistance for your problem they can e-mail you the update.  This allows the initialise VI to work and you can write your labview program from there.

Hope you get it sorted

Graeme

[J._Mondry]

We had the same problem and found the misunderstanding...

Prerequesits

We use Labview 8.5, but it’s the same for 8.2 or below …
Installed IVI 3.0 Compliance package
Installed TQL Driver release 1.4 (from website) both CVI and Labview, even if only need Labview

Attention: there might be a bug in the installer. If you only install the Labview driver, the TQL_32 DLL is not installed properly.

Checks

a) Make sure TQL_32 DLL  is Version 1.4 (see img043)
b) Check communication : in NI’s Max explorer use the VISA panel set the appropriate COM (COM 3 in our example) to 19200 Baud and get nice communication through VISA (see pictures 44-46) LabView - the error
Open Labview, open TQLP Initialize, set resource name to ASRL3::INSTR and start VI. You will get the error as described by us and others on the web : timeout expired. (see img042)

LabView - the solution

What we are doing wrong here is not setting the channel to proper baud rate of 19200. We will have to mix VISA and IVI a bit here. But with a construction like this (see img047) communication works fine …. (basically using the VISA property node to set the baudrate and then use the VISA Refnum as input for the IVI Refnum of the TQL Init function .

Well, now one would like to put the images somewhere ... someone who is interested in this solution and has a server available for these may drop me an email at mondry@zeiss.de and I'll send him the screenshots ...

[K C]

Hi,

Are you sure you posted this in the right thread ? 

This one is about a TTi power supply

[J._Mondry]

yes, certainly,

We had the same problem the other members had connecting to the TTi QLL335TP PowerSupply using the TTi LabView driver and found the reason of the problem. I thought that was worth posting.

[dimabro]

I had the same problem , but I'm trying to work with VBA , I can't read from the  QL355TP , but succsefuly send commands, what can I do? please help

[Spacecowboy]

Hi

If you have problems with these power supplies then buy a USB to RS232 converter, and then connect to the power supply using the RS232 connection on the back. That has worked for me in the past.

Hope this helps.

[dimabro]

thanks ,

does GPIB helps?

another thing, what files/drivers should I have? and where can I download them? - maybe I  miis something.

[MathieuGuigue]

Hello Spacecowboy,

I'm using TTi powersupply via an USB connection and I have issues: I start my program and it works perfectly but from time to time, the communication to the powersupply seems to be lost and I have an "Timeout expired before operation completed" error.

I then have to restart Labview and the powersupply.

Everything (described upper) is up to date.

You told dimabro to work with RS232 via an USB/RS232 convertor and that it solved your poblem: may I ask why?

Is USB connection not stable for long time?

Thank you in advance for your reply,

Mathieu

[Spacecowboy]

Hi Mathieu

The TTi power supply has its own USB to RS232 inside, but we had problems with using the USB connection. Buying a Star Tech USB converter and installing there drivers seems to make it alot more stable. Having said that if I am using several TTi power supplys together on the same system I buy a PCI to rs232 card these are much better for mutlple RS232 connections. You can then use the TTi driver without any issues.

  Hope this helps.

  Spacecowboy.