To switch on relay one by one automatically

[RBCHAVAN_77]

We are  having cRIO 9022 in which we are using NI 9472 DO module to which 4 relays are connected. we need to switch the relay one by one with time interval gap of 1 minute. What is the best method to implement the same. Whether Elapsed time express Vi will solve the purpose. How? 

Thanks

[niNickC]

Hi there,

I am assuming you are wanting to do this on the RealTime target not an FPGA?

A simple way to do this would be to use a timed loop with a a dt value of 60 000 (1kHz clock).

Within this you would have a case structure with a shift register wired to the case selector terminal. This shift register would be incremented on each loop iteration, a simple wrap around could also be implemented.

Each case would activate a channel on the DO module.