array or not

I like to know your experience with exchanging variabele values to different PLC's thru one variable with an array or to have one variabel without array, so sending the value on different times to PLC's.

I always keep blocks of data that all PLC's read from one another. This way everyone's got everything. If I've got new data to send I just map it into the block (call it an array if you want to.)

Cheers,

Yosi