Hi all,

I have to work with two DT800 because I haven�t got enough channels with one DT800, but I need to acquire data in both at the same time reason why I must synchronize them.

I had thought about running the program in each DT800 with a digital input that is the same one for both and thus the readings are synchronous. Would it be sufficient with defining schedule that it read a digital channel DS continuous and executed the rest of schedules when the input changed to 1? As it is defined exactly that alarm?...

On the other hand, I have problems when reading the digital channels since as much if they do not have anything connected like connecting a switch that changes of 0 to 5 V its stay is 1... is necessary some type of configuration?

Thanks for your help,
Ana Isabel.

Good morning Ana,

Yes you can use a digital to synchronize dataTakers.

The concept is to use one dataTaker as a master and the others as slaves. The master sends a digital output which is used to synchronize the slave loggers. The slave loggers trigger their schedules on the falling edge of a digital input (Digital input 1 used in the examples).

It is then a simple matter of connecting the digital grounds and digital 1 on all the datatakers together.

Master Program

BEGIN"Master"

RA1M
   1DSO=0   'Turn digital input 1 off
   'Put your list of channels here
   1DSO=1   'Turn digital input 1 on when finished.
END

Slave Program

BEGIN"Slave1"

RA1-E 'trigger the schedule on a falling edge of digital input 1

   'Put your list of channels here

END

Cheers,
Roger