1 Overview
1-10
CJ2 CPU Unit Hardware User’s Manual
Programming Languages Ladder Logic (LD),
Sequential Function Charts (SFC),
Structured Text (ST), and
Instruction Lists (IL)
Function
Blocks
Maximum number of definitions 2,048
Maximum number of instances 2,048
Tasks Type of Tasks Cyclic tasks
Interrupt tasks (Power OFF interrupt tasks, scheduled interrupt tasks, I/O interrupt tasks, and external
interrupt tasks)
Number of Tasks Cyclic tasks: 128
Interrupt tasks: 256
(Interrupt tasks can be defined as cyclic tasks to create extra cyclic tasks. Therefore, the total number of
cyclic tasks is actually 384 max.)
Symbols (Vari-
ables)
Type of Symbols • Local symbols: Can be used only within a single task in the PLC.
• Global symbols: Can be used in all tasks in the PLC.
• Network symbols (tags): I/O memory in the CPU Unit can be externally accessed using symbols,
depending on parameter settings.
Data Type of Symbols • BOOL (bit)
• UINT (one-word unsigned binary)
• UDINT (two-word unsigned binary)
• ULINT (four-word unsigned binary)
• UINT BCD (one-word unsigned BCD)
• INT (one-word signed binary)
• DINT (two-word signed binary)
• LINT (four-word signed binary)
• UDINT BCD (two-word unsigned BCD)
• ULINT BCD (four-word unsigned BCD)
• REAL (two-word floating-point), LREAL (four-word floating-point)
• CHANNEL (word), NUMBER (constant or number)
• WORD (one-word hexadecimal)
• DWORD (two-word hexadecimal)
• LWORD (four-word hexadecimal)
•TIMER
• COUNTER
Maximum Size of Symbol 32k words
Array Symbols (Array Variables) One-dimensional arrays
Number of Array Elements 32,000 elements max.
Number of Registrable Tags 20,000 max.
Length of Tag Name 255 bytes max.
Encode of Tag Name UTF-8
Data Tracing Memory Capacity 8,000 words 16,000 words 32,000 words
(Up to 32k words x 25 banks when EM is specified in CX-Programmer)
Number of Samplings Bits = 31, one-word data =16, two-word data = 8, four-word data = 4
Sampling Cycle 1 to 2,550 ms (Unit: 1 ms)
Trigger Conditions ON/OFF of specified bit
Data comparison of specified word
Data size: 1 word, 2 words, 4 words
Comparison Method: Equals (=), Greater Than (>), Greater Than or Equals (3), Less Than (<), Less
Than or Equals (≤), Not Equal (≠)
Delay Value −32,768 to +32,767 ms
File Memory Memory Card (128, 256, or 512 Mbytes) (Use the Memory Cards provided by OMRON.)
EM file memory (Part of the EM Area can be converted for use as file memory.)
Source/Com-
ment Memory
Function block program memory,
comment file, program index file,
symbol tables
Capacity: 3.5 Mbytes
Items
CJ2H-
CPU64-EIP CPU65-EIP CPU66-EIP CPU67-EIP CPU68-EIP
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