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MITSUBISHI A73CPUR21 General micro and small PLC storage capacity is fixed, between 1~2KB Moving CPU unit A73CPUR21
Brand: MITSUBISHI
Name: Moving CPU unit
Model: A73CPUR21
Multi axis positioning controller.
Coaxial data communication line function.
Program capacity: Max 60K step.
Input / output points: 1920 points.
PLC commonly used in memory are EPROM, EEPROM and with lithium battery powered RAM.
General micro and small PLC storage capacity is fixed, between 1~2KB.
How much memory is occupied by a user application is related to many factors,
Such as I/O points, control requirements, computing processing, program structure, etc..
So it can only be roughly estimated before the program is designed.

Input voltage range: AC100-120V/200-240V.
Output voltage: DC-15/15V.
Output current: A616DAV 0.7A/1.2A, for A616DAI.
I/O slot installation.
Is the analog output unit (A616DAV, A616DAI) dedicated power supply.
I/O points is an important indicator of PLC.
Reasonable selection of I/O points can not only satisfy the control requirements of the system,
And the total investment of the system is the lowest MITSUBISHI A73CPUR21 A73CPUR21
The input and output points and types of PLC should be determined according to the analog quantity and switch quantity of the controlled object,
Generally an input / output element to take up an input / output point.
Taking into account the future adjustment and expansion,
In general should be estimated on the total number of points plus the amount of spare 20%~30% MITSUBISHI A73CPUR21.
The following describes the centralized control system I/O points of the estimate. SI-200/250 fiber optic cable.
Double loop.
MELSECNET (II) (Master / local station).
How to choose MITSUBISHI PLC.
MITSUBISHI PLC options include the choice of MITSUBISHI PLC models, capacity, I/O module, power, etc..
MITSUBISHI PLC distribution I/O points and design MITSUBISHI PLC peripheral hardware circuit
Draw the I/O point of the PLC and the input / output device connection diagram or the corresponding table,
This part also can be carried out in second steps MITSUBISHI A73CPUR21.
Design PLC peripheral hardware circuit MITSUBISHI Moving CPU unit.
Draw the electrical wiring diagram of the other parts of the system,
Including the main circuit and the control circuit does not enter the PLC, etc MITSUBISHI Moving CPU unit. .
The electrical schematic diagram of the system composed of I/O PLC connection diagram and PLC peripheral electrical circuit diagram.
So far the system''s hardware electrical circuit has been determined. Input and output points: 512 points.
Input / output data points: 8192 points MITSUBISHI Moving CPU unit.
Program capacity: 14K.
Basic command processing speed (LD command) s:0.20.
Integral type: the PLC components are installed together or a few pieces of printed circuit board,
And together with the power supply installed in the casing to form a single overall called the host or the basic unit, small, ultra small PLC using this structure.
Modular: PLC is the basic components of a separate module.
Medium and large PLC used this way. Easy maintenance.
Each scanning process. Focus on the input signal sampling. Focus on the output signal to refresh.
Input refresh process. When the input port is closed,
Program in the implementation phase, the input end of a new state, the new state can not be read.
Only when the program is scanned, the new state is read.
A scan cycle is divided into the input sample, the program execution, the output refresh.
The contents of the component image register are changed with the change of the execution of the program.
The length of the scan cycle is determined by the three.
CPU the speed of executing instructions.
Time of instruction.
Instruction count.
Due to the adoption of centralized sampling.
Centralized output mode.
There exist input / output hysteresis phenomena, i.e., the input / output response delay.
User program storage capacity: it is a measuure of how much the user application can store the number of indicators A73CPUR21.
Usually in words or K words as units. 16 bit binary number is a word,
Every 1024 words are 1K words. PLC to store instructions and data in words.
General llogical operation instructions each account for 1 words MITSUBISHI A73CPUR21. Timer / counter,
Shift instruction accounted for 2 words. Data operation instructions for 2~4.


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