Hello to Switch on Burst mode for all sensors it has to be send to USB Stick this command (in hex) "58FFFF" , but if you want to active burst mode only for fisrt sensor then you have to send "580001".
That's all - first byte is command 'X' andnext two is enable bitmask.
And you second problem - If you want to disable sleep features of ZSTAR3 sensors, then you have to periodically send cammand 'Y' to USB Stick. And USB Stick erase timeout counter in each sensor.
The period for this command I recommend about 30 seconds.
Have a nice day