Omron SYSMAC C20P User Manual

103
Scan time
Input
signal
Output
signal
Scan
Scan time
I/O refresh
Overseeing
I/O response time
CPU reads
input signal
CPU writes
output signal
Output ON delay
Input ON delay
Minimum I/O response time = Input ON delay + Scan time + I/O refresh time
+ Overseeing time + Output ON delay
The PC takes longest to respond when it receives the input signal just after
the input refresh phase of the scan. In this case the CPU does not recognize
the input signal until the end of the next scan. The maximum response time
is thus one scan longer than the minimum I/O response time, except that the
input refresh time would not need to be added in because the input comes
just after it rather than before it.
Input
signal
Output
signal
Scan
Scan time
I/O refresh
I/O response time
CPU reads
input signal
CPU writes
output signal
Output ON delay
Input ON delay
Overseeing
Scan time
Maximum I/O response time = input ON delay + (scan time x 2) + overseeing
time + output ON delay
Maximum I/O Response
Time
I/O Response Time Section 6–5

Omron SYSMAC C20P Specifications

General

Brand	Omron
Model	SYSMAC C20P
Category	Controller
Language	English