time delay to switch on and off multiple load sequentially for load testing

[p^2]

time delay to switch on and off multiple load sequentially for load testing: automatic on and off control of load

[Frank-L]

p^2,

The time delay depends on several factors [Device Model Number, Settling Time Attribute Setting, and PC Hardware (If using SW timing)].

If you provide more information we would be able to assist further.

[p^2]

Sir, i made a small hardware for relay switching using NPN darlington pair. the relays i used for my hardware are solid state relays : 480V ac, 12Vdc, 10A other relays are electromagnetic relays : 230Vac,12Vdc, 7A. i would like to design program for automatic controlling the load on sequentially and off sequentially. i know the logic but i am not able to process for the program. i will b thankful if you could help me to make a program for automatic on off control with some time interval.

[Frank-L]

p^2,

What are you using to control the relays [Digital ports on a DAQ card, Relay driver (2567), etc]?

Also what ADE do you want to program in (LabVIEW, CVI, C, etc)

[p^2]

Sir,

i am using  DAQ card digital output (9401) to control relay thro NPN darlington pair switching. using Labview i have to control the load automatically so that it should ON sequentially and then after all of them on i ahve to make OFF one by one with some time interval/delay.

[Frank-L]

p^2,

I have written a quick example that turns on sequentially and off sequentially. This uses the DAQmx write function to turn on the relays, waiting 100ms [or other specified period] between each turn on. Then it waits another amount [in this case 200 ms] to ensure that the relay has been on for 1000ms [or some other specified period] before being turned off. 

[p^2]

Thanks Sir for your reply!!!!

further i would like to do remote controlling and monitoring of load so that may save energy if someone let load remain on.

[Frank-L]

p^2,

It sounds like you are looking more for a system designed application rather than simple examples. That is something that would likely be better assisted by an NI systems engineer or an alliance partner.