Omron CJ2 User Manual

8-11
8 Backup Operations
CJ2 CPU Unit Hardware User’s Manual
8-3 Simple Backup
8
8-3-3 Verifying Backup Operations with Indicators
*1 When the backup operation is completed normally, power to the Memory Card will go OFF when the MCPWR indicator
goes OFF. If the Memory Card will be used again, press the Memory Card Power Switch to supply power and execute the
desired operation.
*2 The backup files for Units and Boards are also compared.
Restoring data from
the Memory Card to
the CPU Unit
The data was not restored due to one of the following
causes.
• Program in Memory Card exceeds CPU Unit capacity
• Required backup files do not exist in Memory Card.
• Program can't be written because it is write-protected
(Pin 1 of the DIP switch is ON.)
• The EM file was not complete, i.e., a portion was missing.
• There are fewer CPU Unit EM banks than backup EM
files.
The I/O tables are not correct (e.g., the same unit number
was set twice).
• A Unit was added to the configuration since the data was
backed up.
• The unit number settings for Special I/O Units or CPU
Bus Units are not correct.
A Unit was added to the configuration since the data was
backed up.
Comparing data
between the CPU Unit
and the Memory Card
The following comparison errors can occur:
• Memory error in CPU Unit
*2
• Incorrect I/O tables (e.g., the same unit number set twice)
• Comparison results (of backup files on Memory Card and
data in PLC) do not match.
• Required backup files do not exist in Memory Card.
*2
• I/O bus error
Backup operation
Normal completion*
1
Error occurred
MCPWR status MCPWR status Error
MCPWR
MCPWR
MCPWR
MCPWR
Lit when power is
turned ON.
Flashes once.
Lit while reading.
OFF after data is
read.
MCPWR
MCPWR
MCPWR
Lit when power is turned
ON.
Flashes five times.
Goes OFF.
MCPWR
MCPWR
MCPWR
Lit when power is
turned ON.
Flashes once.
Remains lit.
MCPWR
H8
Same as for normal
completion.
Special I/O or CPU
Bus Unit ERR indicator
7-segment LED indicator
Displayed as “H8”
MCPWR
INEE Board
READY
indicator
Flashing
Same as for normal
completion.
MCPWR
MCPWR
MCPWR
MCPWR
Remains lit while the Memory
Card Power Switch is pressed.
Lit
Flashes once.
Lit while comparing.
OFF after data
is compared.
MCPWR
MCPWR
Lit
Remains lit while
the Memory Card
Power Switch is
pressed.
Remains flashing.

Omron CJ2 Specifications

General

Model	CJ2
Manufacturer	Omron
Type	Programmable Logic Controller (PLC)
CPU Units	Multiple models available (e.g., CJ2M, CJ2H)
Number of I/O Points	Up to 2, 560 points
Communication Ports	Ethernet/IP, EtherCAT, USB, Serial
Expansion	Yes, via I/O Units and Special I/O Units
I/O Control Method	Cyclic Scan, Interrupt
Programming Language	Ladder diagram, structured text, function block diagram, sequential function chart, instruction list
Built-in I/O	Available on some models (e.g., CJ2M)
Ethernet Port	Yes, 1 port (depending on CPU Unit)
Serial Ports	RS-232C, RS-422/485 (configurable)
USB Port	Yes (for programming and monitoring)
Operating Temperature	0°C to 55°C
Storage Temperature	-25 to 70°C
Humidity	10 to 95% RH (non-condensing)
Vibration Resistance	10 to 57 Hz, Amplitude: 0.075 mm, 57 to 150 Hz, Acceleration: 1 G, X, Y, and Z directions, 80 min each
Power Supply Voltage	24 VDC or 100 to 240 VAC (depending on CPU Unit)