Watlow F4 communication error need help

[weerapol]

HI,

  I run WLF4 initialize.vi (Labview 7) to run watlow F4 , I Just start talk to controller and got error as attached.

PS, I connect serial cable  to watlow,

any suggession to talking to controller?

Thanks

[falkpl]

If this occurs on the first read/write, a likely candidate is the wiring or com settings, make sure your baud rate in the application and controller matches (as well as parity, data bits ect...)

[weerapol]

Hi

  Is there any example show how to set com settings, baud rate?

Thanks

[RTSLVU]

You are getting a Modbus error but are connected through a serial port?

I would check the supplied vi's and make sure there is not some serial/modbus setting to change.

Could you post the F4 vi's you have or wher you got them.

We have a thermal chamber with an F4 here I can try them on.

[weerapol]

I connect to serial port connector and VI driver for Labview 7 follow this link.

http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=E3B19B3E9722659CE034080020E748...

Thanks

[falkpl]

Took a quick look at the driver, it looks like communications settings are not set on startup (not sure why)  so it is using the current settings of the port, this is prob 9800 8bit and no parity (just as guess), you should bake sure that the watlow is setup with the same settings, I have seen in the past that the baud rate had been set to m19.6k on the watlow and caused no cmmunication until the labview/visa settings matched the settings on the watlow controller.

[weerapol]

Hi Paul Falkenstein

    Which diagram do I need to modify to make a match communication seting ?

Thanks

[Joe_S]

Hello weerapol,

You can access and change the baud rate of the serial port through a VISA property node.  For example, in the WLF4 Initialize.vi, you can add another property to the property node and specify your desired baud rate there.  Hope this helps!

Regards, 

Joe S.

[weerapol]

Hello, NI Application engineer

   I have communication now , next problem I try to call profile that I has been created by manual name Profile2.

How to I call profile to run chamber?

As my attached I have error during call profile  any advise  thanks

Wee

[weerapol]

This is an error