Omron SYSMAC LINK C1000H-SLK21-V1 System Manual page 81

Data Link Characteristics
Node #7 PC Cycle Time
Minimum Response Time
Input
Input ON delay
Program
The cycle time of the PC at node #7 is 50 ms or 15 ms.
The following diagram illustrates the data flow that will produce the minimum
response time, i.e., the time required if all signals and data transmissions are
processed as soon as they occur.
Input device
1 cycle
SYSMAC LINK Unit
transmission processing
Communications
cycle time
Data link I/O response time
The equation for minimum data link I/O response time is as follows:
Response time =
input ON delay (0 ms) + cycle time of PC at node #0 (20 ms)
+ communications cycle time (19 ms) × 2 + cycle time of PC at node #7 (50 ms)
+ output ON delay (0 ms)
= 108 ms
Note Noise may increase I/O delays.
PC at node #1
Data link transmission
1 cycle
Program
Output ON
delay
Output
Section 5-10
I/O refresh
Data exchange
PC at node #7
Output device
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