CJ1H/CJ1G Programmable Controller

Fast

Improving actual applications from input and operation to output

Top model in CJ Series: Executes a 38-Kstep ladder program in 1 ms (basic instructions only).
PCMIX = 16
LD: 20 ns; OUT: 20 ns

Application Example

Compact

Mountable in line with other components in narrow spaces between ducts 

Also reduces installation area and volume

Eliminating the need for a Backplane enables flexible width design

Slim 65-mm depth enables thinner control panels

High Speed

Ultra-fast Cycle Time

Executes 38K steps of basic instructions only, or 22K steps of basic and special instructions, in a cycle time of 1 ms.

1. Instruction processing times from 20 ns.

2. Faster processing of frequently used special instructions.

3. Shortened I/O refresh times for various Units by doubling bus performance.

4. Improved performance in both event response and instruction execution. (Event response: 2 times faster; cycle time: 1/4)

5. Cycle time variations minimized for data processing.

6. Improved refresh performance (approximately double) for data links, DeviceNet remote I/O communications, Protocol Macros, and more.

7. Overhead time reduced by 40%.

8. Faster task switching

Faster Processing of Frequently Used Special Instructions

Based on analysis of user applications, hardware support is provided for approximately 20 of the most frequently used instructions (out of over 400 instructions total) to further speed up processing. These instructions include the following:

• CPS (SIGNED BINARY COMPARE)

• CPSL (DOUBLE SIGNED BINARY COMPARE)

• XFER (BLOCK TRANSFER)

• MOVB (MOVE BIT)

• MOVD (MOVE DIGIT)

• BSET (BLOCK SET)

• JMP (JUMP)

• CJP (CONDITIONAL JUMP)

• BCNT (BIT COUNTER)

• MLPX (DATA DECODER)

• BCD (BINARY-TO-BCD)

• SBS/RET (SUBROUTINE/RETURN)

 

Twice the System Bus Transfer Speed

The efficiency of transfers between the CPU Unit and Special I/O Units has been doubled,  further improving overall system performance. 

Parallel Program Execution and Peripheral Servicing in Parallel Processing Mode

A mode is provided for parallel processing of program execution and peripheral servicing. Executing peripheral servicing in parallel with program execution has approximately doubled the response of peripheral servicing, enabling the following types of application.

Data can be refreshed smoothly, with uniform timing for data exchanges with SCADA software. There will be no effect on cycle time in the event of future expansions even if communications are increased or if the network is expanded.

High-speed Structured Programming

More Cyclic Tasks (Up to 288)

Task programs provide increased efficiency for programs that are developed by multiple  programmers or divided by function. The number of tasks that can be executed as cyclic tasks has been expanded from 32 to 288.

Rapid Switching between Tasks

Switching between tasks is faster, so the cycle time is not slowed down even in highly structured programs.

Standardization of Common Processing from Multiple Tasks

Subroutines that can be called from multiple tasks (global subroutines) are supported so that common processing from multiple tasks can be used as standard programming.

Built-in Flash Memory in All Models

Battery-free Operation with Flash Memory

When the user program or data in the parameter areas is transferred to the CPU Unit, it is now automatically backed up in the flash memory built into the CPU Unit. At startup, this data is automatically restored from the flash memory to the operating memory, enabling battery-free operation without a Memory Card.
LD: 20 ns; OUT: 20 ns

An Instruction for Essentially Every Application

Conversion between Floating-point Decimal and Character String Data

Floating point decimal numbers can be easily converted to ASCII character string data for display on a PT. The data can be displayed in the PT’s character string display objects.

ASCII character string data read via serial communications from measuring devices can be easily converted to floating-point decimal data for use in operations.

High-resolution Approximation Supported

High-resolution line approximations can be generated for operations such as converting from a level measurement in mm to tank capacity in liters according to the shape of the tank. (The line data can be unsigned16-bit binary/BCD, signed 16/32-bit binary data, or single-precision floating-point decimal data.) 

PID with Autotuning

PID constants can be autotuned automatically using the PID WITH AUTOTUNING instruction. A 
limit cycle is used for tuning, so the tuning is completed quickly. This is particularly 
effective for multi-loop PID control.