Weightlessness scale and method of metering verification and compounding
Weightlessness scale metering verification and mixing method. This method sets the main parameters of multiple feeders according to the output device of the industrial control computer. The load cell obtains the weighing data signal of each feeder and transmits it to the PLC control module, which is controlled by the PLC. The module outputs real-time adjustment data signals through the soft starter and actuator to operate the feeder to carry out the feeding and adjust the reliability of the total mixing flow. Its characteristics depend on the process implemented by this method: 1) The system software is plugged in, according to The main parameters of the configuration set by the industrial computer are entered, including total flow, material level limit, material level low limit, refill time, set total flow adjustment, in addition, connect the load sensor data signal, and the system software conducts self-check; 2) Resolve yes It is not booting. If the result is yes, turn on the automatic switch, and operate the soft starter at the starting rate specified by the key parameters. If the result is no, perform the process 11); 3) After 60 seconds of operation , Carry out data information comparison, and enter the automatic batching operation; 4) Identify whether the material in the silo is lower than the feeding limit setting, if the result is yes, get the feeding limit alarm; if the result is no, implement the process 5); 5) Distinguish whether it is lower than the lower limit of the material level, if the result is yes, open the feeding valve to start feeding; if the result is no, carry out the process 6); 6) Distinguish whether the lower limit of the material level is exceeded, common fault alarms; Process 7); If the result is no, the feeding will be obtained after 60 seconds. 7) Determine whether the material level limit is exceeded. If the result is F, turn off the feeding valve to terminate feeding and implement the process 8); if the result is no, the feeding valve remains Turn on the situation; 8) Identify whether the PID adjustment is in progress, if the result is yes, just start the PID adjustment: if the specific total flow exceeds the set total flow, the PID adjustment reduces the rate and outputs to the soft starter; if the specific total flow is lower than the set The total flow, PID adjusts the increase rate and outputs it to the soft starter; if the result is no, return to process 2); 9) Determine whether the difference A between the specific total flow and the set total flow is lower than a certain value and exceeds the allowable range, if The result is yes, get the railway bridge alarm; 10) distinguish whether the square root of the difference A between the specific total flow and the set total flow exceeds a certain value and is within the allowable range, if the result is yes, get a deviation alarm; 11) distinguish system Whether the software is stopped, when you press and hold the automatic switch, the system software stops running, and the machine equipment is turned off.