How to send float values to registers without interrupting the script in progress

Technical Questions URScript
1

In my application ,the UR Robot is executing a script, which is sent through the secondary port.
I want to write 6 float numbers to a register by the function write_output_float_register .
In order to ensure not interrupte the ongoing script .I tried to send script by RTDE port.
here is the script.
def writeOutputFloatRegister():
write_output_float_register(3, 1.1)
write_output_float_register(4, 2.2)
write_output_float_register(5, 3.3)
write_output_float_register(6, 4.4)
write_output_float_register(7, 5.5)
end

I sent it with secondary port ,it worked, but RTDE was not.
What should I do for this?