Removing an Unintentional Serial Break

[ryan@gar]

I have a RS-232 connection to a development platform and I'm using a Labivew connection to automate a test.  The test mostly works, but every now and then, I get a serial break in my communication which locks up the development platform (serial break is not used in the final application).  I do not have a serial break vi in my program.  What whould be generating this unintentional break?

5758       0.00002995          GTM4G V2.exe IRP_MJ_WRITE Serial0   SUCCESS              Length 9: 10 AA 03 C5 38 22 34 10 03         

5759       0.00000124          GTM4G V2.exe IRP_MJ_FLUSH_BUFFERS            Serial0   SUCCESS                            

5760       0.00000143          GTM4G V2.exe IOCTL_SERIAL_GET_COMMSTATUS        Serial0   SUCCESS                              

5761       0.00000106          GTM4G V2.exe IOCTL_SERIAL_GET_COMMSTATUS        Serial0   SUCCESS                              

5762       0.00000195          GTM4G V2.exe IOCTL_SERIAL_PURGE   Serial0   SUCCESS              Purge: TXABORT TXCLEAR            

5763       0.00000411          GTM4G V2.exe IOCTL_SERIAL_SET_BREAK_ON Serial0   SUCCESS                              

5764       0.00000379          GTM4G V2.exe IOCTL_SERIAL_WAIT_ON_MASK              Serial0   SUCCESS                              

5765       0.26961526          GTM4G V2.exe IOCTL_SERIAL_WAIT_ON_MASK              Serial0   SUCCESS                              

5766       0.00000165          GTM4G V2.exe IOCTL_SERIAL_GET_COMMSTATUS        Serial0   SUCCESS                              

5767       0.00000116          GTM4G V2.exe IOCTL_SERIAL_GET_COMMSTATUS        Serial0   SUCCESS                              

5768       0.00000114          GTM4G V2.exe IOCTL_SERIAL_GET_COMMSTATUS        Serial0   SUCCESS                              

5769       0.00000275          GTM4G V2.exe IRP_MJ_READ   Serial0   SUCCESS              Length 8: 10 15 02 AA 00 3F 10

Thanks

Ryan

[Z'atari]

What kind of instrument are you connecting? Have you tried communicating to this instrument using other software, does it lock up the same way? 

Regards,

A. Zaatari

[ryan@gar]

The instrument we are talking to is a consumer electronic device still under development.  The code in this device is not setup to handle the breaks.

[Z'atari]

I am not sure why you would get a break, can you post your vi for further investigation?

[ryan@gar]

Attached is the vi.

[Dennis_Knutson]

You are sending numerous serial breaks in your program. They are not unintentional at all. Have you read the help for the VISA Clear?