The screw batcher system realizes serial communication based on Visual Basic development environment, the data of weighing instrument is sent to the host computer in real time through serial port, and the host computer will intercept and convert the data read, and the weighing data can be displayed in the VB running screen in real time. At the same time, the weighing data can be stored in the database. It is easy to query and trace the data, which not only facilitates the supervision of the weighing process, but also restricts the operation of workers.
020-34563445The feeding system mixes raw materials and auxiliary materials together in a certain proportion according to the pharmaceutical production process regulations; It is a process of feeding and discharging materials according to pre-set values and errors for one or more materials. The dosing process requires no dust, can be reviewed and traceable, and minimizes the risk of contamination, cross-contamination, confusion and error during the transfer of powder materials.
The batcher system realizes serial communication based on Visual Basic development environment. The data of weighing instrument is sent to the host computer in real time through serial port. The host computer will intercept and convert the data read, and the weighing data can be displayed in the VB running screen in real time. It is easy to query and trace the data, which not only facilitates the supervision of the weighing process, but also restricts the operation of workers. The RS232C interface of the weighing instrument is 25 pins, which can be added to the RS485 converter during long-distance communication. The RS485 communication replaces the long-distance RS232C communication, and is directly connected to the host computer through the Ethernet cable.
The automatic material weighing control unit is mainly a weighing instrument, PLC as an auxiliary control system, the computer man-machine interface displays the ratio parameter (formula) and monitors and records real-time data. In the automatic control mode, click the automatic batching "start" button in the pre-dispensing process screen, or the "start" button in the front dispensing control cabinet, and the weighing instrument will open the material valve according to the set formula. If the system detects that one of the batching valves is not closed, an alarm will occur and enter the suspended state. Each weighing valve speed is provided with the lead, when the control instrument detects that the weight of the weighing material reaches the set value, the Electronic scale will subtract the lead, and the control weighing instrument will close the feed valve. The amount of lead can be manually corrected or automatically corrected, so that the precision of each batching of the control weighing instrument can reach the set target value.
Put the solvent that has been weighed into the mixing tank in a certain order, and start mixing and heating at the same time. This control process is completed by temperature control instrument and PLC. The temperature control instrument controls the upper temperature limit, and the heating is controlled by PLC. Automatic proportioning has two control methods: fixed sequence and programmable. In the fixed sequence mode, the discharge order of various solvents is fixed and cannot be changed. In the programmable mode, the discharge order of various solvents can be manually determined on the human-machine interface according to the formula. The post-proportioning control is based on the flow detection of the solvent scale. The control host detects the flow rate of the solvent scale through RS485 communication mode, and gives the control current of the solvent pump and non-ion pump according to the distribution ratio. PLC output 4 ~ 20mA control solvent pump, non-ion pump inverter, so that the solvent and non-ion discharge seedling with the flow of the solvent scale change, solvent pump and non-ion pump ratio control for PID regulation control.
