Omron CJ2 CPU UNIT SOFTWARE User Manual

10 CPU Unit Functions
10-86
CJ2 CPU Unit Software User’s Manual
z I/O Response Times for Synchronous Units
The I/O response time for a Synchronous Unit is the total of the times required for the following pro-
cesses.
(1) Inputs from external devices to Synchronous Units
(2) Synchronous input data refresh (Synchronous Units to CPU Unit)
(3) Synchronous interrupt task execution
(4) Synchronous output data refresh (CPU Unit to Synchronous Units)
(5) Internal processing in Synchronous Unit
(6) Output from Synchronous Unit to external device
The maximum I/O response time is thus two times the synchronous operation cycle time.
Example for a CJ1W-NC@@4 Position Control Unit
The internal processing time is 1 ms for this Unit, so the synchronous operation cycle time must be
at least 1 ms. The I/O response time for this Position Control Unit would thus always be 2 ms.
CPU Unit
Synchronous
Unit
(4) Synchronous output data refresh
(2) Synchronous input
data refresh
Standby
(3) Synchronous
interrupt task
Synchronous operation cycle
Synchronous data initialization
Normal processing
Normal processing
Normal processing
Synchronous interrupt task
(2) Synchronous input
data refresh
Synchronous input data refresh
Synchronous input data refresh
Synchronous input data refresh
Synchronous input data refresh
Synchronous input data refresh
Synchronous input data refresh
Internal processing
Internal processing
Standby
Standby
Standby
Internal processing
Internal processing
Synchronous
Unit
(1) Input from external
device
(6) Output to external
device
Maximum I/O response time = Synchronous operation cycle time x 2
(1) Input from external
device
(5) Internal
processing
(5) Internal
processing
(5) Internal
processing
(5) Internal
processing
Normal processing
Synchronous input data refresh
Synchronous output data refresh
Synchronous output data refresh
Synchronous output data refresh
Synchronous output data refresh
(4) Synchronous output
data refresh
(4) Synchronous output
data refresh
Synchronous operation cycle
(6) Output to external
device

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English