Category: Master station.
Transfer speed: 125kbps/250kbps/500kbps/1Mbps.
Transmission line form: bus system.
Total distance: 125kbps:1000m/250kbps:800m/500kbps:480m/1Mbps:240m.
The maximum connection units: 32.
Total points: input + output <=2048 point.
MITSUBISHI PLC detection, fault diagnosis and display and other procedures A73CPUR21 Dedicated Instructions Manual A73CPUR21 Programming Manual.
These procedures are relatively independent, generally in the basic completion of the program design and then add A73CPUR21
MITSUBISHI PLC protection and chain procedures.
Protection and chain is an indispensable part of the program, must be carefully considered.
It can avoid the control logic confusion caused by illegal operations. Input and output points: 1024 points.
Input / output data points: 1024 points A73CPUR21 Dedicated Instructions Manual A73CPUR21 Programming Manual.
Program capacity: 14K.
Basic command processing speed (LD command) s:0.20.
Optical data communication line function (GI cable).
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 A73CPUR21 Dedicated Instructions Manual A73CPUR21 Programming Manual.
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 measure of how much the user application can store thee number of indicators A73CPUR21 Dedicated Instructions Manual A73CPUR21 Programming Manual.
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 A73CPUR21 Dedicated Instructions Manual A73CPUR21 Programming Manual. Timer / counter,
Shift instruction accounted for 2 words. Data operation instructions for 2~4.