Omron CJ2 CPU UNIT SOFTWARE User Manual

3 CPU Unit Operation
3-6
CJ2 CPU Unit Software User’s Manual
The I/O Unit processing time depends on the type and number of Configuration Units that are used in
the PLC. The processing time for each Unit is constant.
It is possible to shorten the processing time by stopping cyclic I/O refreshing for Special I/O Units. To
stop I/O refreshing for Special I/O Units, set the parameter on the SIOU Refresh Tab Page in the CX-
Programmer. The following table lists the refresh processing for the PLC Units.
* Supported only by the CJ2H-CPU6@-EIP and CJ2M-CPU3@. The EtherNet/IP port built into the CJ2H-CPU6@-
EIP provides the same performance and functions as a CJ1W-EIP21 EtherNet/IP Unit. The EtherNet/IP port built
into the CJ2M-CPU3@ provides very different performance. Refer to the EtherNet/IP Unit Operation Manual (Cat.
No. W465) for details.
Additional Information
It is possible to exchange data with the Units when instructions are executed rather than during
the normal I/O refresh period. This is called immediate refreshing. Immediate refreshing is possi-
ble by attaching an exclamation mark (!) to some instructions, or by using the IORF(097),
FIORF(225), and DLNK(226) instructions.
The following instructions can be used to increase the speed of data exchange with certain Spe-
cial I/O Units or CPU Bus Units by using direct processing. Refer to the Instructions Reference
Manual (Cat. No. W474) for details.
• ANALOG INPUT DIRECT CONVERSION (AIDC(216)) (for CJ1W-AD042 High-speed Analog
Input Unit)
*1
• ANALOG OUTPUT DIRECT CONVERSION (AODC(217)) (for CJ1W-DA042V High-speed
Analog Output Unit)
*1
• DIRECT TRANSMIT VIA SERIAL COMMUNICATIONS UNIT/SERIAL PORT (DTXDU(262))
(CJ1W-SCU@2 only)
*1
• DIRECT RECEIVE VIA SERIAL COMMUNICATIONS UNIT/SERIAL PORT (DRXDU(261))
(CJ1W-SCU@2 only)
*1
• PCU HIGH-SPEED POSITIONING (NCDMV(218)) (CJ1W-NC@@4 and CJ1W-NC@ only)
*2
• PCU POSITIONING TRIGGER (NCDTR(219)) (CJ1W-NC@81 only)
*2
*1 These instructions are supported only by the CJ2H-CPU6@(-EIP) (unit version 1.1 or later) and CJ2M
CPU Units.
*2 Supported only by the CJ2H-CPU6@(-EIP) with unit version 1.3 or later and CJ2M CPU Units.
I/O Refreshing
Units Maximum data exchange Data exchange area
Basic I/O Units Depends on the Unit. I/O Bit Area
Spe-
cial I/O
Units
Words allocated in CIO Area 10 words/Unit (Depends on the
Unit.)
Special I/O Unit Area
Unit-spe-
cific data
CompoBus/S Master Unit Depends on the Unit. Words set for remote I/O communications
CPU
Bus
Units
Words allocated in CIO Area 25 words/Unit CPU Bus Unit Area
Words allocated in DM Area 100 words/Unit CPU Bus Unit words
Unit-spe-
cific data
(Refer to
the right.)
Built-in EtherNet/IP port
*
EtherNet/IP Unit
Depends on the EtherNet/IP
functions that are used.
Tag Data Link Area
Controller Link Unit and
SYSMAC LINK Unit
Depends on the Unit. Words set for data links (for either fixed or
user-set allocations)
DeviceNet Unit Depends on the Unit. Words set for remote I/O communications
(for either fixed or user-set allocations)
Serial Communications
Unit
Depends on the protocol mac-
ros.
Communications data set for protocol
macros
Ethernet Unit Depends on the Unit. Communications data for socket services
initiated by specific control bit operations.

Omron CJ2 CPU UNIT SOFTWARE Specifications

General

Brand	Omron
Model	CJ2 CPU UNIT SOFTWARE
Category	Software
Language	English