3C-2V/5C-2V coaxial cable single bus remote I/O network (remote I/O station).
Q mode.
When the programmer input programinto the user program memory,
Then CPU according to the function of the system (the system program memory to explain the compiler),
Translate the user program into PLC internally recognized by the user to compile the program A1SJ71DN91.
Input status and input information input from the input interface,
CPU will be stored in the working data memory or in the input image register A1SJ71DN91
And then combine the data and the program with CPU.
The result is stored in the output image register or the working data memory,
And then output to the output interface, control the external drive.
Semiconductor circuit with memory function A1SJ71DN91.
System program memory and user memory.
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.
User memory: user program storage area and work data storage area A1SJ71DN91.
Composed of random access memory (RAM). User use.
Power cut off. Commonly used efficient lithium battery as a backup power supply, life is generally 3~5 years. 3 slots; requires 1 AnS series PLC power modules;
Used to install large AnS series PLC module.
Base plate of AnS series PLC.
QA1S series PLC 3 slot main substrate.
AnS series of modules can be installed. Cable connection and A7PU/A7HGP/A6GPP CPU,
Cable length 3 meters.
Provide A7HGP-SET/A6GPP-SET. SRAM memory card.
RAM capacity: 256KB. Ethernet network module 10BASE-T / 10BASE5.Program memory capacity: 8k.
Input / output points: maximum 256 points.
A scan cycle of PLC must pass through three stages: input sampling, program execution and output refresh A1SJ71DN91.
PLC in the input sampling phase: first of all, in order to scan the sequence of all existing input latches in the input terminal of the state or input data read,
And write it into the corresponding input status register,
Refresh the input, then close the input port, enter the program execution stage A1SJ71DN91.