Design and implementation of a process control language for an automated pager manufacturing system

A process control language for an automated pager manufacturing system and its implementation are dealt with. The pager manufacturing process consists of the tuning process in the tune TEM-cell and the examination process in the exam TEM-cell. Three capacitor trimmers are tuned to optimize the state of the pager in the shielding box, we call it the TEM-cell, using small motors, pneumatic actuators and sensors. In the exam TEM-cell equipped with a CCD camera and pneumatic actuators, message receiving status with an arbitrary message calling is tested using a vision system. For both tuning and examination process, 37 process control commands are defined by analyzing the manual pager manufacturing process. Project editors are used to make a process description command file, we call it the project file, are also presented. The system is composed of a desktop personal computer(PC586) and two TEM-cells, two Flex pager testers, an oscilloscope, a camera sensor and actuators controlled by 5 Lonwork controllers. Visual Basic running on the Windows 95 is used to implement the control software which has the GUI function. The effectiveness of the completed control program is shown by the field test with the machine developed at KITECH, Korea, which is now ready for production.