Medical Industry Mass Flow Meter
Sealand is a professional manufacturer of Medical Mass Flow Meter, Medical Mass Flowmeter, Medical Coriolis Meter, Medical Flow Meter, Medical Flowmeter, ATEX, IECEx & CE approved.
There are 2 optical switches for operation. The SET and SELECT optical switches are used to navigate the transmitter display. To
activate an optical switch, move your finger 1~2mm over the optical switch close to the
glass.
Mark:
The general operation is listed as follows.
On Main Interfaces
Activate SET to alternate mass and volume values.
Activate SELECT to alternate main interfaces.
Long activate SELECT to go to Setup Interface.
Long activate SET for total reset.
Back to Main Interface
Long activate SET & SELECT at the same time.
Select Submenu,
Parameters & Numbers
Activate SELECT to select the submenu, parameters or
numbers.
Activate SET to go to submenu or save parameters/numbers.
Save setup
Long activate SET to save the modified setup.
Back or Exit
Long activate SELECT.
Medical Mass Flow Meter, Medical Mass Flowmeter, Medical Coriolis Meter, Medical Flow Meter, Medical Flowmeter Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeters.com 1 Introduction
In order to protect the machine and to facilitate maintenance, the PLC has the ability to display and detect machine faults. In the event of a malfunction, the maintenance personnel can determine the fault category based on the fault display number of the machine tool and eliminate it. However, in the actual processing, we found that sometimes the PLC displays several faults at the same time. They are cascading faults caused by one fault, eliminating the initial faults, and other fault alarms disappear. However, from all the alarm faults displayed by the machine tool PLC, the maintenance personnel do not know which fault is the initial fault, and the maintenance personnel can only check one by one, which increases the difficulty of maintenance and wastes manpower and material resources. When several faults are displayed at the same time, the key to solving the problem is to solve the initial fault, so it is very important to accurately judge and detect the initial fault to the machine repair work. We designed a machine tool PLC initial fault diagnosis function, through the PLC program, accurately determine the initial fault alarm number. In the maintenance, the initial fault is first eliminated, and other faults are eliminated by themselves, which greatly facilitates the maintenance of the machine tool and improves the speed and accuracy of the machine tool repair. 2 Principle of initial fault diagnosis
The PLC program we designed not only can detect and display each fault, but also automatically judge the most critical initial fault. The initial fault judgment procedure of PLC is shown in the figure. 
The following is an example of the initial fault diagnosis principle. Taking three faults as an example, three fault detection bits are set, which are R500.0, R510.0, and R520.0 respectively; three initial fault detection bits are R500.2, R510.2, and R520.2; F149 .1 is the system reset signal. In the initial state, no alarm occurs, the fault detection bit is "0", the initial fault detection bit is also "0", and the reset signal F149.1 is "0". It is assumed in the three failures that the second failure occurs first. In the first cycle of the program scan, its corresponding fault detection bit R510.0 becomes "1", R500.2, R520.2, F149.1 initial value is "0", initial fault detection bit R510.2 It becomes "1" and remains "1" by self-locking until the fault is eliminated, and the "1" state is released after the system reset signal is issued. In the second cycle of the program scan, R510.2 remains "1", which realizes the blocking of R500.1 and R520.1. Even if another fault detection bit is "1" at this time, it cannot cause it. The initial fault detection bit becomes "1". Through the control of this PLC program, the initial fault can be accurately determined from the numerous faults occurring at the same time. 3 application examples
4 Conclusion
The initial fault detection function of the machine tool PLC designed by us can accurately judge the initial fault caused when several faults are displayed at the same time, which brings great convenience to the maintenance of the machine tool, avoids many meaningless work and improves the maintenance efficiency. . Good results have been achieved in practical applications.
1. The display will timeout without any operation in 5 min.
2. During numbers input, the decimal point will come up automatically if the first digit is 0; if not 0, please activate SELECT until decimal point shows up.