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| Item | Specifications | |
| Control method | Stored program | |
| I/O control method | Cyclic scan and immediate processing are both possible. | |
| Programming | LD (Ladder), SFC (Sequential Function Chart), ST (Structured Text), Mnemonic | |
| CPU processing mode | CJ1M CPU Units: Normal Mode or Peripheral Servicing Priority Mode | |
| Instruction length | 1 to 7 steps per instruction | |
| Ladder instructions | Approx. 400 (3-digit function codes) | |
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Execution time |
· CJ1M CPU Units (CPU12/13/22/23):Basic instructions: 0.10 ms min. Special instructions: 0.15 ms min.
· CJ1M CPU Units (CPU11/21): Basic instructions: 0.10 ms min. Special instructions: 0.15 ms min. |
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| Overhead time | · CJ1M CPU Units (CPU12/13/22/23): 0.5 ms min.· CJ1M CPU Units (CPU11/21): 0.7 ms min. | |
| Unit connection method | No Backplane: Units connected directly to each other. | |
| Mounting method | DIN Track (screw mounting not possible) | |
| Maximum number of connectable Units | CJ1M CPU Units:Total of 20 Units in the System, including 10 Units on CPU Rack and 10 Units on one Expansion Rack. | |
| Maximum number of Expansion Racks | · CJ1M CPU Units (CPU 13/23 only):1 max. (An I/O Control Unit is required on the CPU Rack and an I/O Interface Unit is required on the Expansion Rack.)
· CJ1M CPU Units (CPU11/12/21/22): Expansion is not possible. |
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Number of tasks |
288 (cyclic tasks: 32, interrupt tasks: 256)With CJ1M CPU Units, interrupt tasks can be defined as cyclic tasks called “extra cyclic tasks.” Including these, up to 288 cyclic tasks can be used.
Note: 1. Cyclic tasks are executed each cycle and are controlled with TKON(820) and TKOF(821) instructions. 2. The following 4 types of interrupt tasks are supported. Power OFF interrupt tasks: 1 max. Scheduled interrupt tasks: 2 max. I/O interrupt tasks: 32 max. External interrupt tasks: 256 max. |
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Interrupt types |
Scheduled Interrupts:Interrupts generated at a time scheduled by the CPU Unit’s built-in timer. (See note. 1) I/O Interrupts: Interrupts from Interrupt Input Units.
Power OFF Interrupts (See note 2.): Interrupts executed when the CPU Unit’s power is turned OFF. External I/O Interrupts: Interrupts from the Special I/O Units or CPU Bus Units. Note: 1. CJ1M CPU Units: Scheduled interrupt time interval is 0.5 ms to 999.9 ms (in increments of 0.1 ms), 1 ms to 9,999 ms (in increments of 1 ms), or 10 ms to 99,990 ms (in increments of 10 ms) 2. Not supported when the CJ1W-PD022 Power Supply Unit is mounted. |
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| Function blocks (CPU Unit with unit version 3.0 or later only) | Languages in function block definitions: ladder programming, structured text | |
| Work Area | 8,192 bits (512 words): W00000 to W51115 (W000 to W511)Controls the programs only. (I/O from external I/O terminals is not possible.)
Note: When using work bits in programming, use the bits in the Work Area first before using bits from other areas. |
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Holding Area |
8,192 bits (512 words): H00000 to H51115 (H000 to H511)Holding bits are used to control the execution of the program, and maintain their ON/OFF status when the PLC is turned OFF or theoperating mode is changed.
Note: The Function Block Holding Area words are allocated from H512 to H1535. These words can be used only for the function block instance area (internally allocated variable area). |
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| Auxiliary Area | Read only: 7,168 bits (448 words): A00000 to A44715 (words A000 to A447) Read/write: 8,192 bits (512 words): A44800 to A95915 (words A448 to A959) Auxiliary bits are allocated specific functions. | |
| Temporary Area | 16 bits (TR0 to TR15)Temporary bits are used to temporarily store the ON/OFF execution conditions at program branches. | |
| Timer Area | 4,096: T0000 to T4095 (used for timers only) | |
| Counter Area | 4,096: C0000 to C4095 (used for counters only) | |
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DM Area |
32 Kwords: D00000 to D32767Used as a general-purpose data area for reading and writing data in word units (16 bits). Words in the DM Area maintain their status when the PLC is turned OFF or the operating mode is changed.
Internal Special I/O Unit DM Area: D20000 to D29599 (100 words ´ 96 Units) Used to set parameters for Special I/O Units. CPU Bus Unit DM Area: D30000 to D31599 (100 words ´ 16 Units) Used to set parameters for CPU Bus Units. |
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| Index Registers | IR0 to IR15Store PLC memory addresses for indirect addressing. Index registers can be used independently in each task. One register is 32 bits (2words).
· CJ1M CPU Units: Setting to use index registers either independently in each task or to share them between tasks. |
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| Task Flag Area | 32 (TK0000 to TK0031)Task Flags are read-only flags that are ON when the corresponding cyclic task is executable and OFF when the corresponding task is not executable or in standby status. | |
| Trace Memory | 4,000 words (trace data: 31 bits, 6 words) | |
| File Memory | Memory Cards: Compact flash memory cards can be used (MS-DOS format). | |
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