Application of AS-Interface in Jinbei General Motors Andon System

The AS-Interface bus technology is an intelligent network that uses a single cable to connect sensors and actuators to controllers and transmit data and provide power. In the Jinbei General Motors Quality ANDON system, many excellent features and functions of the AS-Interface bus have been brought into full play to meet the system expansion without affecting the current production requirements, providing a simple and economical intelligent for the flexible production of automobiles. Network solution.

The AS-Interface Bus Technology AS-Interface (Actuator-Sensor-Interface) is an abbreviation for Actuator-Sensor-Interface, which is used to bidirectionally switch between a controller (master) and a sensor/actuator (slave). The smart bus network for exchanging information is a monitoring network system belonging to the fieldbus lower device layer.
In the past, each signal was coded and transmitted to a high-level controller via a separate cable. This resulted in a large number of cable clusters at the production site, and greatly increased the size of the control cabinet. At the same time, the potential failure of the system during operation. The number of outage incidents is proportional to the number of contacts. The AS-Interface bus technology is an intelligent network that uses a single cable to connect sensors and actuators to controllers, and transmits data to provide power.
The AS-Interface bus system is a master-slave structure. AS-Interface masters and controllers (IPC, PLC, DC) are collectively referred to as system masters (MASTER). There are two slaves (SLAVE), one is a smart sensor/actuator with an AS-Interface communication chip, and the other is a separate I/O module connected to a common sensor/actuator. The unshielded non-twisted two-conductor cable is used between the master and slave stations. The standard AS-Interface flat cable used is a patented puncture installation method with a simple and reliable connection. In addition to transmitting signals on 2-core cables, network power is also transmitted.
The AS-Interface bus system is an open system that can be connected to a variety of fieldbuses (eg FF, Profibus, DeviceNet, Ethernet, etc.) via a gateway in the master station. The AS-Interface master station acts as a node of the upper fieldbus, and at the same time can completely decentralize a certain amount of AS-Interface slaves. The AS-Interface bus can be used to connect sensor/actuator systems with digital features. In the new 2.11 specification, it is also very suitable for connecting analog signals.
The basic technical features of the AS-Interface bus system are as follows:
(1) Network topology: various topologies such as bus, star, ring, and tree;
(2) Transmission media: Unshielded, non-twisted 2-conductor cables provide data and power;
(3) Cable length: An AS-Interface bus network ≤ 100M, using repeaters can be extended to 300M, using P + F's TUNER or TERMIANL can be extended to 600M;
(4) Slave number: A maximum of 62 slaves (248 sensors and 186 actuators) on one AS-Interface bus network;
(5) Cycle time: A fully loaded AS-Interface bus cycle time is 5/10ms.

Andon system Andon also called "dark lamp", originally a Japanese transliteration, Japanese means "light", "lantern", and now the Andon system is not just a light, but a multi-automatic control system of acousto-optic multimedia, It is an information management and control system designed specifically for automobile production and assembly lines and has become an indispensable part of the complete automotive production line. The Andon system can collect information about equipment and quality management on the production line and, after processing it, control the light and sound alarm systems distributed throughout the workshop.
The Andon system has now become a standard equipment for the automotive industry, and is widely used in the assembly, body (welding) and painting processes of the four major automotive workshops.
The quality Andon system supports the principle of synchronizing manufacturing products on the premise of ensuring product quality, that is, adopting the quality problem of the product in a timely manner in the production process, rather than solving the product quality problem in the final quality inspection process of the product manufacturing. The quality Andon system prompts each operator to complete the correct process of manufacturing the product at its workstation, preventing the transmission of faults in manufacturing to the next process.
The quality Andon system on the production line allows the operator to receive timely assistance and support in the event of quality problems in the production process. It can help the workers in the production line to complete the quality and reliable automotive assembly tasks within the specified production cycle. Therefore, the quality Andon system The main function is to complete the quality automation monitoring in the production process.

Jinbei General Motors' Quality Andon System 1. System Functions Shenyang Jinbei General Motors Co., Ltd. Quality Andon system functions are briefly described as follows:
• Install the lever/pull cord at the corresponding station, and the operator pulls the pull-down rod/pull cord to request a help signal;
• The operator's request for help information will be displayed on the Andon board in a specific area of ​​the shop;
• Play specific music for each section to indicate help request information and other quality issues in this section;
• If the problem is not resolved before the vehicle reaches the FPS, the conveyor chain will stop at a specific location. When the transmission chain stops, the stop-music is played and the corresponding Andon displays a hint color or logo.
2. System Structure The quality Andon system of Shenyang Jinbei General Motors Co., Ltd. consists of four parts: the operation part, sound, display, and recording part. In the operation section, each station is generally provided with a pull rod or a button box, and the operator sends out information through them when needed to get timely desired help and support.
The system structure adopts distributed control. The main controller adopts the 9070 large-scale PLC of GE FAUNC of the United States, and connects Profibus/AS-Interface gateway of the German P+F company with the Profibus bus downwards. The AS-Interface is highly flexible and distributed. The input/output module connects I/Os such as QCOS points, PULL CORD, and music boxes distributed in the field to the ANDON system.

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