8 slots.
Requires 1 power modules.
Used to install the old section of the large A series PLC module.
Switch volume control is designed to,
According to the current input combination of the switch quantity and the history of the input sequence,
So that PLC generates the corresponding switching output,
In order to make the system work in a certain order Q26UDHCPU Programming Manual.
So, sometimes also known as the order control Q26UDHCPU
And sequential control is divided into manual, semi-automatic or automatic.
And the control principle is decentralized, centralized and hybrid control three.
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 Q26UDHCPU Programming Manual.
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 Q26UDHCPU Programming Manual.
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.
System program memory for storing system program,
Including management procedures, monitoring procedures, as well as the user program to do the compiler to compile the process of interpretation.
Read only memory. Manufacturers use, content can not be changed, power does not disappear.Program capacity: 28K step.
Input / output points: 1096 points.
Number of input and output elements: 8192.
Processing speed: 0.034 subtle.
Support RS232.
CPU module expansion standard RAM (max 8MB).
Can be used with the SD memory card at the same time.
Continuous access file register.
Ultra high speed processing, production time is shortened, better performance.
As applicatiions become larger and more complex, it is necessary to shorten the system operation cycle time Q26UDHCPU Manual .
The operation period can be shortened by the super high basic operation speed 1.9ns.
In addition to achieve in the past with the contrrol of single-chip high-speed control,
The system performance can be improved by reducing the total scan time,
To prevent any possible performance bias Q26UDHCPU Manual .