The software has the following features:
Multiple communication functions. ZJQ Configuration Software [3] supports the following communication functions:
Supports serial communication methods such as RS232, RS422, RS485, as well as wireless radio, telephone dial-up, and telephone polling dial-up.
Ethernet communication supports both wired and wireless Ethernet.
All device drivers support mobile network standards such as GPRS, CDMA, and GSM.
Convenient development system. A rich set of components and controls form a powerful HMI development system; enhanced gradient and progressive color functions fundamentally solve the issue of many similar software severely affecting screen refresh speed and system efficiency when overusing gradients and progressive colors; more flexible and diverse vector sub-graphics make engineering screen creation faster; provides object-oriented programming, built-in indirect variables, intermediate variables, and database variables, and supports custom functions and custom menus.
Openness. The openness of ZJQ Configuration Software is reflected in the following aspects:
Supports Excel accessing the database via VBA.
The software features an open architecture, supporting DDE, OPC, ODBC/SQL, ActiveX, and DNA standards. It provides external access interfaces in various forms such as OLE, COM/DCOM, and dynamic link libraries, facilitating users to perform in-depth secondary development using common development tools (e.g., VC++, VB, etc.).
The architecture of ZJQ Configuration Software's I/O drivers is open, with the interface source code publicly available, allowing users to develop new drivers independently.
Database functionality. ZJQ Configuration Software has a built-in real-time database, which itself contains multiple functional blocks to handle data processing and storage, enabling functions such as accumulation, statistics, control, and linearization.

When a programmable logic controller (PLC) is put into operation, its working process is generally divided into three stages: input sampling, user program execution, and output refresh. Completing these three stages is called one scan cycle. During the entire operation, the PLC's CPU repeats these three stages at a certain scanning speed.
1. Input Sampling Stage
During the input sampling stage, the PLC sequentially reads all input states and data in a scanning manner and stores them in the corresponding units of the I/O image area. After input sampling is completed, it transitions to the user program execution and output refresh stages.