104
The data in the following table would produce the minimum and maximum
scan times shown calculated below.
Input ON-delay 1.5 ms
Scan time 20 ms
Input refresh time 0.23 ms
Overseeing time 3.0 ms
Output ON-delay 15 ms
Minimum I/O response time = 1.5 + 20 + 0.23 + 3.0 +15 = 39.73 ms
Maximum I/O response time = 1.5 + (20 x 2) + 3.0 +15 = 59.5 ms
Calculation Example
I/O Response Time Section 6–5