Calculate RPI Timeout for Standard I/O

Assuming best practices are followed, switchover time can be as slow as 50 ms.

Use the following formula to calculate an RPI timeout for standard I/O:

RPI * 2

x

= Y where for the lowest X, Y is ≥ (4 * RPI) + 100 ms

EXAMPLE:

RPI = 4 ms for X = 5, Y = 128

Timeout = 128 ms because 128 > 116 ((4 * 4) + 100)