Bently 1900/65A PLC into microcomputer

The main features of the 1900/65A control system are:

A, the requirement of high efficiency, equipment is intermittent operation, but the requirements of the production efficiency as far as possible to the continuous operation close to.

B, high dosing accuracy, the national standard requirements of sand and gravel dynamic metering accuracy of ≤ 2%, powder and liquid material accuracy of ≤ 1%, especially additives, the dosage of sometimes ten kilograms, the error can not be more than 0.1 kilograms, which is still in the mixer vibration is particularly large occasions; C, the production management requirements are high.

C, production management requirements are relatively high, the production data required to record all, including any manual operation by the user, all the requirements of the manual operation signal through the PLC into the microcomputer.

The I/O points of 1900/65A are about 120, DI and DO points are basically equal, in order to solve the above problems, we adopt Siemens S7-200PLC 214 CPU module, the rest of the I/O modules and AI module for water content detection adopts YIVI’s UN200 series, and the dosage metering is achieved by PLY600, a dosage control instrument developed by Shandong Boshuo itself. In the UN200 module, 8DI/8DO digital module is also used as the keyboard scanning module to collect signals for manual operation, and the system composition is shown in the figure below:

1900/65A is a relatively harsh environment of the application, the control system is very strict test of dust resistance and other aspects. Previously, we used Siemens S7-300 PLC for most of the realisation, the overall cost of the system is high, many users reflect that they want to reduce the price, but in the end, they still accept the high price, after contacting the module of EVERWEAR, we decided to use the UN-300 series of modules to replace the corresponding AI, DI and DO modules after testing, and used the CPU of Siemens 313C-2DP, and the power supply module of EVERWEAR. Power supply module