Work Flow - Omron CJ1M-CPU Series Replacement Manual

This replacement guide describes the procedure to rebuild the system which uses the CJ1-series PLC by
introducing the CJ2M-series PLC instead. The CJ2M-series has functions which can replace the functions and
operation of CJ1-series PLC. Take the below work flow to replace your system. Also, refer to the reference
pages for details.

Work flow

1) Preparation: Before starting replacement, prepare according to the following steps.
Start
Selecting the model
Preparing Units
Reading PLC data
Converting and modifying data
Continue to actual replacement work
2) Actual replacement work: Take the steps below to replace the CJ1M/CJ1G to CJ2M.
Replacing the units
Wiring
Writing data
Checking operation
Replacement finished
2
Description
Select the unit, programming software, and connecting cable
to replace CJ1 with CJ2M.
Some CJ1 Units can be used with CJ2M. However, some
Units can not be used with CJ2M. Read the reference pages
(recommended models and precautions) and select the
models.
Prepare the units, programming software, and connecting
cable.
Load the program, I/O Memory and other settings from the
CJ1M/CJ1G using the programming software and connecting
cable.
Convert the data read from CJ1 for CJ2M.
Most of the data can be automatically converted; however,
some instructions and some Unit data can not be converted.
Refer to the reference pages and modify the data and program
separately.
Description
Replace the units.
*Refer to CJ-series CJ2 CPU Unit Hardware User's
Manual (Cat. No. W472) and user's manuals of each
Special Units for installation of the unit.
Perform wiring for the replacement unit.
*Refer to CJ-series CJ2 CPU Unit Hardware User's
Manual (Cat. No. W472) and user's manuals of each
Special Units for information of wiring.
Write the data acquired
CJ1M/CJ1G (programs, IO memory, setting data) to
CJ2M.
Check the wirings by operating In/Out signals
Turn ON the power to the controller and check the
operation.
Notes:
In some systems, cycle time needs to be adjusted because the cycle times in
CJ1M/CJ1G and CJ2M are different and it may affect the operation.
Reference Pages
1. Performance specifications
2. System Configurations
4.Example of converting
ladder program by
CX-Programmer
4.Example of converting
ladder program by
CX-Programmer
and converted from
Reference pages
Refer to the related
manuals.