Omron NX-EC0112, User Manual

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1 Features and System Configuration
NX-series Position Interface Units User’s Manual (W524)
1-
1 Feat
ures o
f Posi
tion
Int
er-
face
Unit
s
1
1
-1-3
Oper
ation of Position Inter
face
Unit
s
In the NJ/NX-series Controller, the I/O refreshing processing, user program processing, and MC Func-
tion Module processing between the Position Interface Units are executed in the primary periodic task
and priority-5 periodic task.
Refer to NJ/NX-series CPU Unit Software User's Manual (Cat. No. W501) for information on the pri-
mary periodic task and priority-5 periodic task.
The following figure shows an example of the task operation performed for I/O processing for the Posi-
tion Interface Units in the primary periodic task. The same information applies when processing is per-
formed in the priority-5 periodic task.
The input information is obtained from the Position Interface Units every fixed period that the task is
executed. Processing (user program execution and motion control processing) is then performed based
on that information, and the information is sent as an output command.
Abbreviation Meaning
IO I/O refreshing
UPG User program execution
MC Motion control
FB Motion control instructions
Input
UPG
FB
IO MC UPG
FB
IO MC
Primary
periodic task
Motion control instructions executed.
Primary period Primary period
Execution command
Encoder Input Unit
Pulse Output Unit