Re : I'm looking for instrument drivers for a Weiss Gallenkamp ( Weiss Umwelttechnik GmbH ) WKL 34/+10 environmental chamber !!

[hja]

Does anyone know where it could be found, or have any Weiss Umwelttechnik drivers that might work!!
Cheers

[JB]

I have recently written a driver for a VTS4150-5 with RS232 interface. I guess that the protocol is the same but I would like to ask you to check if this is right.

The implemented functions are :

1) Start a predefined cycle
2) Stop the running cycle
3) Read and decode the status
4) There is also a functionnality to manage a powerfail. The VTS4150-5 can be programmed to continue the cycle when the power comes back but it will need about 2 minutes to reboot. Therefore, even a very short powerfail will cause a long silence of the chamber.

Attached is a set of VIs that someone sent to me. Unfortunately I don't remember who it was and I have neither tested nor used them because it was very easy to develop my own.

Please let me know if you are interested in my VIs. I would be willing to send them to your private email.

[Lee-ON]

JB,

I'm very interested in your drivers. Could you send me them or post them in this topic?

[Guruthilak]

Hello JB,

can you send a copy to guruthilak@yahoo.com

Regards

Guru

[JB]

Hi Guruthilak,

What is your LV version ? I'm using LV 2010 SP1.

All labels, comments and descriptions will be in French. Is this OK ?

Regards

[Guruthilak]

Hello JB,

LV version 2010 SP!.. Language is fine...

I have one question...i am using the crossed rs232 cable for connection (according to the manual) but not able to get any response from the chamber (even tried normal cable also)...Any idea on this?

And the chamber model says it is of type C-1000/40

[JB]

I had to select the ASCII-2 protocol of the chamber. Does this option exist on your model ?

These are the settings of the serial port of the computer :

• Port = "COM1"
• Baud rate = "9600"
• Data bits = "8"
• Stop bits = "1"
• Parity = "None"
• Flow control = "None"
• Timeout [ms] = "1000"
• Termination char = "None"
• Receive buffer size = "1000"
• Transmit buffer size = "1000"

This is for example the code for a status request.

All commands must be terminated with carriage return.

Adresse must be set according to the address of the chamber.

The status of the chamber includes 131 bytes terminated by a carriage return.

[Guruthilak]

hello JB,

ASCII-2 option exists in the chamber. I have used null model cable (rs232 for communication) and even used the carriage return as the termination.. But the chamber is not responding..

Could you please zip (or llb) the code as the subvi's are missing when the snippet is loaded.

Let me see what else can be done...

Regards

Guru

[JB]

My configuration :

• NULL MODEM cable
• ASCII-2
• 9600
• (Chamber address = 0)

As mentionned in the protocol, every command must start with $ (ASCII code 36) and end with <CR> (carriage return, ASCII code 13).

eg Status request (see above snippet) = $xxI<CR> (with xx = chamber address)

Attached is a ZIP file with my about ten (!) years old RS232 VIs.

If this shouldn't help to solve your problem, please post a copy or a link to the protocol of your chamber so I can compare it with the on the my chamber.