Omron NJ501-1300 - Page 320

13 Communications Performance and Communications Load
13-24
NJ-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
Task period: 10 ms
Example: Primary periodic task
To Controller #2
To Controller #2
Refreshing period
during RPI
10 ms
I/O refreshing
User program execution
Motion control
Send data
processing
Send data
processing
Task period × 2
Time required to transfer data from Controller #1: 20 ms
Task period: 10 ms
Example: Primary periodic task
RPI of 10 ms
RPI of 20 ms
Task period × 2
(1)
(2)
(1) (2)
Refreshing period
during RPI:
20 ms
Transmission path
Transmission path
Controller#1
Controller#1
Data link processing
(system common processing 3)
OI MC
UPG
OI
UPG
MC
System services
System services
OI MC
UPG
OI MC
UPG
OI MC
UPG
OI MC
UPG
OI MC
UPG
OI MC
UPG
OI MC
UPG