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The Application of NA200 in the Coating Machinery Industry
Release date:
2020-04-07
Coating refers to applying a protective or decorative layer onto metal and non-metal surfaces, and coating machinery represents an industry that has rapidly evolved based on the principles of coating. With advancements in industrial technology, coating processes have shifted from manual methods toward industrial automation—and the level of automation continues to rise. As a result, coating production lines are now being used more extensively, penetrating deep into various sectors of the national economy.
Coating refers to applying protective or decorative layers onto both metallic and non-metallic surfaces, and coating machinery represents an industry that has rapidly evolved on the foundation of coating technology. With advancements in industrial technology, coating processes have shifted from manual methods toward industrial automation—and this trend toward greater automation is steadily intensifying. As a result, coating production lines are now being used more extensively, penetrating deep into various sectors of the national economy.
China's coating process can be simply summarized as: pre-treatment → spraying → drying or curing → pre-treatment → spraying → drying or curing.
With the growth of China's economy and advancements in foreign coating technologies, our country has witnessed rapid development in coating techniques—driven by technology imports and active exchanges with international expertise. In particular, the widespread adoption of electrostatic spraying and electrophoretic coating technologies, along with the development and promotion of powder coating methods, have significantly boosted automation in coating production. This progress is especially evident in thriving sectors such as China's home appliance industry, daily-use hardware, steel furniture manufacturing, aluminum component production, electrical products, and the automotive industry. Moreover, the emergence of intelligent robotic sprayers in coating production lines marks a clear indication of the booming growth within the coating machinery sector.
Process requirements
Pre-processing:
Degreasing tank, phosphating tank liquid heating and water replenishment, as well as spray booth fan start/stop operations.
Conveying · Spray Painting:
Conveyor start/stop operations, operational protection, and speed control;
Paint booth pump and fan start/stop operations, along with operational protection features.
Drying Chamber:
Electric heating start/stop control for the moisture drying chamber, along with automatic temperature regulation and operational protection.
Water Moisture Drying Chamber Thermal Circulation Fan Start/Stop Operation and Operational Protection;
Operation and running protection for the exhaust fan and air curtain in the moisture drying chamber;
Electrical heating start/stop control, automatic temperature adjustment, and operational protection for the topcoat drying chamber;
Operation and running protection for the hot-air circulation fan in the topcoat drying chamber;
Operation and running protection for the exhaust fan and air curtain in the topcoat drying booth;
System Configuration
The PLC is equipped with the NA200 series, paired with a 10-inch touch screen from Nantai Aoto. This setup enables parameter configuration, alarm display, signal monitoring, and access to helpful production data, among other functions.
| Serial Number |
Name |
Model |
Quantity |
Note |
| Preprocessing |
CPU Module |
CPU201-4002 |
1 |
24-channel digital inputs; 16-channel digital outputs; |
| Input/Output Module |
DXM201-1602 |
4 |
8-channel digital input; 8-channel digital output; |
|
| Thermal Resistance Module |
AIM201-0403 |
1 |
4-channel analog input (RTD) |
|
| Conveying · Spray Painting |
CPU Module |
CPU201-4002 |
1 |
24-channel digital inputs; 16-channel digital outputs; |
| Input/Output Module |
DXM201-1602 |
4 |
8-channel digital input; 8-channel digital output; |
|
| Digital Input Module |
DIM201-1601 |
1 |
16-channel digital input |
|
| Analog Output Module |
AOM201-0201 |
1 |
2-channel analog output |
|
| Drying chamber |
CPU Module |
CPU201-4002 |
1 |
24-channel digital inputs; 16-channel digital outputs; |
| Input/Output Module |
DXM201-1602 |
5 |
8-channel digital input; 8-channel digital output; |
|
| Thermal Resistance Module |
AIM201-0403 |
2 |
4-channel analog input (RTD) |
|
| Touch screen |
VIEW1002 |
1 |
10-inch true color display, with 640x480 resolution, and featuring USB and Ethernet ports. |
System Configuration
Communication:
Communicate with one touchscreen and 3 PLCs, using 2 RS-232 ports and 1 RS-485 port.
Process Control:
Although there are quite a few control points, the logic is relatively straightforward. Key considerations include: ① ensuring the pump has dry-run protection and incorporating temperature-control buffering to prevent frequent heating; ② enabling variable-frequency speed control for each conveyor belt, which means installing up-and-down adjustment buttons on every belt to precisely manage the frequency settings.
Figure 1: Pre-processing
Figure 2: Spray Painting
Figure 3: Drying Chamber
Figure 4: Transportation
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Service hotline:+8618905163737
Company Headquarters: No. 15, Building B, Zone B, Phase I, Headquarters Economic Park, 69 Fengzhan Road, Yuhuatai District, Nanjing, Jiangsu, P.R. China
Production Center: No. 219 Qinghuiting West Road, Jiangning Economic Development Zone, Nanjing City, Jiangsu Province
Aoto Technology Co., Ltd.
