Problem with writing to Eurotherm 2416 controller - Keep getting Timeout error

[BZajec]

Dear ChillyWilly,

 Thank you very much for your .vi. Now I successfully established the communication with my Eurotherm 2416. I have no idea where was the problem before.

regards,

Bojan

[ChillyWilly]

Hello BZajec,

Glad i could help.  Are you working on a simple program for the eurotherm or a sophisticated (open/create/run recipe and save data) program?

I work with several of these controllers and I'm always looking for better code for the more automated set-ups.

Cheers

[BZajec]

Dear ChillyWilly,

  The initial idea was to write a simple  program for recording of PV and SP and perhaps the duty cycle (i.e. heating power). 

  Perhaps the need for creating and uploading recipes come later.  

regards.

 Bojan

[JHourigan]

Has anyone had success dealing with the occasional timeout errors on the VI  ET24xx Utility /  Read from Registers - Floating Point ?  

The rest of my code works fine...changing setpoints and monitoring/recording process variable and output power.  But occassionally (apparently randomly) I get timeout errors from the above reference VI.  I've added delays between write and read operations and increased the number of polling iterations before while loops "timeout" to no avail.

Any help would be greatly appreciated - random bugs are the most vexing.

LV 8.2

RS-232 connection with ET2416 via Modbus protocol. RS-232 on Edgeport 412 serial port.

Polling rate 2 Hz

Thanks,

Jeremy

[JHourigan]

Ignore this, edited previous reply