Omron CJ2 CPU UNIT SOFTWARE User Manual

12 CPU Unit Cycle Time
12-6
CJ2 CPU Unit Software User’s Manual
4. I/O Refreshing
5. Peripheral Servicing
The following peripheral device servicing is supported.
• Servicing for Communications Ports (Internal Logic Ports)
Servicing for communications ports is performed when communications instructions in the ladder
program or functions such as background execution or simple backup are used.
• Event Servicing for Special I/O Units or CPU Bus Units
Event servicing is performed whenever a Unit is connected in the PLC. It is also performed in situ-
ations such as when Support Software is used via a Communications Unit.
• USB Port Servicing
USB port servicing is performed when a USB port is being used.
• RS-232C Port Servicing
RS-232C port servicing is performed when an RS-232C port is being used.
• File Access Servicing
File access servicing is performed when a Memory Card or EM file memory is accessed.
• Online Edit Servicing
Online edit servicing is performed when online editing is executed.
• Backup Servicing
Backup servicing is performed when programs or parameters are changed.
When Peripheral Device servicing is not performed, no time is required for processing. The mini-
mum and maximum processing times for Peripheral Device servicing depend on the Set Time to All
Events parameter in the PLC Setup, as shown in the following table.
Details
Processing time and fluc-
tuation cause
Basic I/O Units Basic I/O Units are refreshed. Outputs from the CPU Unit to the
Output Units are refreshed first for each Unit, followed by inputs
from the Input Units to the CPU Unit.
I/O refresh time for each Unit
multiplied by the number of
Units used.
Special I/O
Units
Words allocated in CIO Area I/O refresh time for each Unit
multiplied by the number of
Units used.
Unit-specific
data
Example: CompoBus/S remote I/O
CPU Bus Units Words allocated in CIO and DM Areas I/O refresh time for each Unit
multiplied by the number of
Units used.
Unit-specific
data
Examples:
• EtherNet/IP tag data link refreshing
• Controller Link data link refreshing
• DeviceNet remote I/O communications
• Send/receive data for protocol macros
• Socket services for specific control bits for
Ethernet Units
Peripheral service execution time
Minimum Maximum
Set Time to All Events
parameter
Disable
0 ms (when servicing not exe-
cuted)
10% of cycle time (or 0.1 ms if
10% of the cycle time is less
than 0.1 ms)
Enabled Set time (0.1 to 3,276.7 ms)

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English