Batching system has convenient and flexible Chinese operation interface, real-time data acquisition, display (e.g. weighing) and processing; control operation and control output; equipment and status monitoring; alarm monitoring and processing; data communication with DCS system; historical data management; log record; process flow screen generation and display and dynamic screen display of tank operation; initialization of batching and dosage process; online calculation and online modification; self-diagnosis and self-recovery of batching; database maintenance; report printing; batching function expansion; communication interface with management level, etc. Calculation, online modification; dosage self-diagnosis and self-recovery; database maintenance; report printing; expandability of dosage functions; communication interface with management level.
020-34563445The kettle is weighed by Weighing modules and the weighing instrument is TR200H. F900 is an operator panel from Mitsubishi that provides control and process monitoring through a sealed keypad, supporting text and graphic displays. Each dosage kettle has three pneumatic valves for slow and fast dosage and three pneumatic valves for discharge.
The dosers are set up in "automatic" and "manual" modes of operation: "manual" work is to complete a certain control link alone, such as "feeding", "discharging", "feeding", "discharging", "discharging", "discharging", "discharging", "discharging" and "discharging". Manual" work is to complete a control link alone, such as separate "feeding", separate "mixing" and separate "discharge", allowing pause with the "pause/continue" key to pause, and allow the parameters to be modified in the pause state; Automatic" work is to complete a complete cycle control cycle, including feeding, mixing, discharging and other links, "automatic" operation only allows "pause/continue" key is valid, each "manual" key is valid, "pause/continue" key is valid. The "manual" key is invalid and the parameters cannot be modified.
The automatic feeding system has the function of stopping immediately: when the "stop" key is valid, any control process will stop and return to the weight display state; it has the function of setting zero: press the "set zero" key under the weighing state, it can make the display value go back to zero, if it exceeds the range of setting zero, it cannot be set to zero and displays an error. If it exceeds the range of zero setting, it can not be set to zero and error message will be displayed; with tare function: press "Tare" key in weighing state to deduct the displayed weight as tare, and press "Tare" key again to restore the original displayed weight.
In the actual working process of the dosage control system, due to the wear and tear of the mechanical equipment and the dust of the scale volume and other reasons, it will also cause the change of the pre-pressure and make the zero-point voltage change, in order to ensure the accuracy of the measured value, the software automatically measures the zero-point voltage at regular intervals and then deducts the zero-point value in the calculation. The method of automatic measurement is as follows: when the MCU timing interrupt cycle arrives, the MCU outputs a reset signal to the PLC, the PLC closes the motor, stops charging, then controls the operation for a certain period of time, and measures the material after it is discharged, and then the measured zero-point voltage value is stored in the temporary storage area.
Batching equipment in the charging process, when the difference between the amount of material and the actual amount of material is less than the charging advance, close the charging valve pneumatic valve, stop charging, relying on the inertia and the valve pneumatic valve closed after the material flow to make up for the theoretical amount of material, if the amount of advance is too large, the point of completion of the way to use point action (i.e., the feeding motor using a pulse drive mode, every time the start, only a small amount of material), in order to ensure the accuracy of the weighing.
