JPH10148559A - Display of flow meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device of a flow meter capable of correcting all parameters without removing a case of the display device, and in particular, to provide a device configured so that parameters that can be corrected can be arbitrarily limited. [MEANS FOR SOLVING PROBLEMS] A configuration is provided in which all parameters for flow rate display can be corrected by operating switches 3a, 3b, 3c from outside, and a parameter that can be corrected by a parameter correction operator is limited. Therefore, even if the type of liquid to be measured changes after the flow meter is installed and the display content on the display device 1 changes, the display parameter can be easily changed regardless of the installation location of the flow meter. In addition to the safe operation of changing parameters in explosion-proof areas, parameters other than those specified by specific workers may not be changed during production or maintenance. It is not possible to modify the parameters for the maintenance, and it is possible to provide a device suitable for maintenance management.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a flow meter having a display unit for arbitrarily switching and displaying a display unit of a flow rate of a liquid to be measured, and in particular, various displays and settings can be easily made at an installation place of the flow meter. The present invention relates to a display device capable of correcting parameters necessary for the display.

[0002]

2. Description of the Related Art In recent years, computerization of display devices of various flowmeters has been advanced, and one display device can support various flowmeters. For this reason, the display device is provided with switches, and by operating these switches, it is possible to switch the display of the total flow rate, the instantaneous flow rate, and the like desired by the customer, and to reset the integrated flow rate value. After installation, if there is a change in the liquid to be measured flowing through the flow meter or the like, the customer can arbitrarily call display parameters and correct them. In this type of display device, it is necessary to limit the range in which the parameter can be changed on the customer side in terms of maintenance of the display device, and the parameters for the maintenance service and the initial setting parameters specific to the flow meter which are input at the manufacturing stage of the display device. The switch for calling is not exposed to the outside and is arranged in the display device.

[0003]

In this type of flow meter display device, the flow rate unit and the unit are set according to the parameters for maintenance service or the type of flow meter set at the stage of manufacturing the display device and the type of the liquid to be measured. To read the initial setting parameters such as the flow rate per flow rate pulse and the viscosity of the liquid to be measured, it is necessary to remove the case of the display device and operate switches, resulting in extremely poor workability. Disadvantages have arisen.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to make it possible to arbitrarily limit the display device of a flow meter in which all parameters can be corrected without removing the case of the display device, especially the parameters that can be corrected. It is intended to provide the configured device.

[0005]

Various parameters required for displaying a flow rate according to a plurality of display modes are stored in a storage unit.
The parameters necessary for performing the flow rate display corresponding to the desired display mode are stored in such a manner as to be able to be individually called, and a flow rate in a predetermined unit is calculated from these parameters and a flow rate signal corresponding to the flow rate of the liquid to be measured. In a display device of a flow meter having a display unit for displaying, a mode command switch for selecting a desired flow rate display, a stepping switch for changing a value of the display unit, and an operation unit provided with a reset switch exposed to the outside are provided. When a plurality of signals are output simultaneously from the operation unit, the calling range of the parameters stored in the storage unit is changed and the mode command switch and the step switch are stored each time a signal is output from the operation unit. A control unit is provided for sequentially calling parameters stored in the unit, displaying the parameters, and enabling correction.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a display device of a flow meter that measures the flow rate of a liquid to be measured, and a counter unit 2 that integrates a flow rate pulse transmitted according to the flow rate of the liquid to be measured.
An operation unit 3 having a mode command switch 3a, a step switch 3b, and a reset switch 3c exposed to the outside, various flow rate displays during a manufacturing stage of the display device 1, and parameters necessary for various settings are grouped for each functional group, and these parameters are collected. Storage unit 4 for moving the address for each parameter display mode (hereinafter referred to as P display mode) for each step number described below corresponding to the function group and storing the addresses one by one, and determining the integrated value of the counter unit 2 A control unit 5 that reads out every time and performs necessary calculations according to a flow rate display mode command signal from the operation unit 3 and outputs the calculation result to a display unit 6 described later, and a flow rate display mode command signal from the operation unit 3 And a display unit 6 for displaying flow rate information based on.

The mode command switch 3a outputs a flow rate display mode command signal in the normal flow rate display mode to sequentially select a flow rate display such as an integrated flow rate, an instantaneous flow rate, a resettable integrated flow rate, a cumulative total flow rate, and the like in the setting mode. The function selection mode, the first display mode, the second display mode, and the like are sequentially selected, and the display is returned to the post-function selection mode after reaching the final display mode. The step switch 3
b is effective only in the setting mode, and is configured so that the step number is incremented in accordance with the number of times of pressing, and returns to the initial value (0) when this value reaches a predetermined value.
Further, the reset switch 3c is configured to reset the resettable integrated flow value only when the resettable integrated flow rate is displayed.

The parameters stored in the storage unit 4 are as follows:
It consists of customer parameters, maintenance service parameters, and initial setting parameters that can be selected for each step number corresponding to the function selection mode. The customer parameter is an integration unit instruction value (integration unit: ml, l
Etc.), the total flow initial value, the reset flow total initial value, and the instantaneous flow unit instruction value (/ h,
/ Min etc.), an upper limit flow rate alarm value, a lower limit flow rate alarm value, and other indication values relating to the display of instantaneous flow rates, and other indication values required for liquid viscosity equalization flow rate display and need to be input on the customer side. I have. The maintenance service parameters include a segment check instruction value of the display unit 6, an input check instruction value, and other instruction values necessary for the maintenance service. Further, the initial setting parameters are a meter factor specific to the flow meter, which is input at a manufacturing stage of the display device 1, and the rotor 1 of the flow meter.
It is composed of parameters for various initial settings such as the number of pulses per rotation, parameters for ROM rewriting, and viscosity correction values of a plurality of liquids.

In the normal flow rate display mode, the control section 5 calls: 1) the current flow rate display mode, as shown in FIG. 2) It is determined whether the current flow rate display mode is the resettable cumulative flow mode, and this jumps to 8) in the resettable cumulative flow mode. 3) It is determined whether a predetermined time has elapsed. If the predetermined time has not elapsed, the procedure returns to 1). 4) Read the integrated value of the counter section. 5) Retrieve parameters required for flow rate display corresponding to the current flow rate display mode from the storage unit, calculate a desired flow rate, and display the calculation result on the display unit. At this time, the timer for measuring a certain time is reset, and re-measurement is started. 6) It is determined whether or not an ON signal has been output from the mode command switch. If this signal has not been output, the process returns to 1). 7) Set the next flow rate display mode to the current flow rate display mode, and return to 1). 8) It is determined whether or not there is a reset signal from the reset switch. When this is not output, the process returns to 3). 9) Set the resettable integrated flow value to the initial value and return to 3). It is configured so that

When a plurality of ON signals are simultaneously output from the operation unit 3, that is, when the step switch 3b is pressed while the mode command switch 3a is pressed, the control unit 5 switches the setting mode. 3) As shown in FIG. 3, 1) clear the display on the display unit (simultaneously, the same step as step 13 described later is executed). 2) Wait for password input (Wait for ON signal from mode command switch). 3) If the password is a customer password, jump to 23). 4) When the password is for maintenance service, 24)
Jump to 5) When the password is not for the initial setting used in the flow meter manufacturing stage, return to 2). 6) The current step number is set to the initial value (0), the function selection mode is selected, and the sorting information (a, b,
c, ...) are displayed. 7) It is determined whether there is an ON signal from the step switch, and if there is no ON signal, jump to 9). 8) Add +1 to the current step number. 9) Classification information corresponding to the current step number in the function selection mode corresponding to the current step number is displayed. 10) It is determined whether there is an ON signal from the mode command switch, and if there is no ON signal, the process returns to 7). 11) Set the next P display mode to the current P display mode. 12) Call the parameter at the address corresponding to the current P display mode and the current step number, and display it on the display unit. 13) It is determined whether there is no key operation for a certain period of time, and if there is no key operation, jump to 25). 14) The presence or absence of the output of an ON signal from the reset switch is determined, and when this is detected, the cursor position is moved to the next display digit, and the value of the display digit is set to be changeable. 15) It is determined whether or not an ON signal has been output from the step switch. When the ON signal is output, the value of the display digit of the display unit where the cursor is located is incremented. 16) The presence or absence of a signal from the mode command switch is determined. If there is no signal, the process returns to 12). 17) It is determined whether the ON signal from the mode command switch has continued for a predetermined time, and when this signal continues for a predetermined time, 25)
Jump to 18) Store the input data of the display unit. 19) Wait for an ON signal from the mode command switch. 20) Set the next P display mode to the current P display mode. 21) It is determined whether or not the current P display mode is the function selection mode. If not, the process returns to 12). 22) When the current P display mode is the function selection mode, return to 7). 23) The current step number is set to an initial value (0), and the current step number is set to return to the initial value when the current step number reaches the first set value. The classification information corresponding to the number is displayed, and the procedure returns to 7). 24) The current step number is set to an initial value (0), and is set to return to the initial value (0) when the current step number reaches a second set value larger than the first set value. Further, the user selects the function selection mode, displays the segment information corresponding to the current step number, and returns to step 7). 25) Return. It is configured to operate according to the program.

In the display device of the flow meter, in the normal flow rate display mode, necessary parameters are called from the storage unit 4 in accordance with the flow rate display mode command signal from the mode command switch 3a, and these parameters and the flow rate of the liquid to be measured are read. A predetermined flow rate is calculated from the integrated value of the counter section 2 that integrates the number of flow rate pulses according to the above, and this is displayed on the display section 6. When the parameters stored in the storage unit 4 of the display device 1 of the flow meter are to be corrected, the setting mode is selected by simultaneously pressing the mode command switch 3a and the step switch 3b. In this state, a parameter setting operator inputs a password. If the password is for a customer, the password is set to return to the initial value when the current step number reaches the first set value. At the same time, the function selection mode is selected, and the classification information (a, b, c,...) Stored corresponding to the current step number (initial value is set to 0).
Is displayed. In this state, when the ON signal is pressed from the step switch 3b, the sorting information is sequentially switched.

When the mode command switch 3a is pressed after selecting the desired section information, the next P display mode, that is, the first P display mode is called, and the first P display mode and the current step number are selected. The stored parameters are called up and displayed on the display unit 6. At this time, the cursor is positioned at one of the display digits on the display unit 6 and its value can be corrected.
When the reset switch 3c is pressed, the cursor moves to the next display digit, so that the step switch 3b is pressed at the desired display digit, and the desired display digit is sequentially corrected to a predetermined value. During this time, if no switch is pressed for a certain period of time, the mode returns to the normal flow rate display mode, and the previously displayed flow rate is displayed.

Thereafter, when the mode command switch 3a is pressed, the value on the display unit 6 is stored at the same address in the storage unit 4. After the new parameter is stored, when another parameter corresponding to the second P display mode, the third P display mode, or the like of the same information section is subsequently called, the mode command switch 3a is repeatedly pressed. This mode command switch 3
The desired P display mode is selected by the ON signal of a, the corresponding parameter is called, and its value is similarly corrected and stored.

After the new parameters are stored,
When it is necessary to modify the parameters of another information section, the mode command switch 3a is repeatedly pressed to select the function selection mode. In this state, the step switch 3b is pressed, the current step number is incremented, a desired information section is selected, and after the mode command switch 3a is pressed,
As described above, the parameters of the desired function group are displayed on the display unit 6, and the values are corrected. At this time, when the current step number reaches the first set value, it returns to the initial value, so that in the case of a customer password, the range of parameters that can be modified is limited.

When the password is for a maintenance worker, parameters can be modified in the same manner as for a customer password, but the second set value at which the current step number returns to the initial value is larger than the first set value. Therefore, more parameters required for the maintenance service can be called and corrected.

Further, when the password is an initial setting password, the current step number reaches the maximum value and returns to the initial value, so that all the parameters stored in the storage unit 4 are called out and are corrected. Is done.

In addition, when the mode command switch 3a continuously outputs an ON signal for a predetermined time or more in the setting mode, the mode returns to the normal flow rate display mode, and a predetermined flow rate is displayed.

[0018]

As described above, according to the present invention, all the parameters for the flow rate display can be modified by operating the switches from the outside, and the parameters which can be modified by the parameter modifying operator are limited. With this configuration, even if the type of liquid to be measured changes after the flow meter is installed and the contents displayed on the display change, the display parameter can be easily changed regardless of the flow meter installation location. In addition to being able to safely perform parameter change work in explosion-proof areas, equipment other than specific workers cannot modify parameters at the manufacturing stage or maintenance parameters, making it suitable for maintenance management. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic view of a display device of a flow meter according to the present invention.

FIG. 2 is a flowchart illustrating an operation of a control unit according to the present invention in a normal display mode.

FIG. 3 is a flowchart illustrating an operation of a control unit according to the present invention in a setting mode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Counter part 3 Operation part 3a Mode command switch 3b Step switch 3c Reset switch 4 Storage part 5 Control part 6 Display part

Claims (1)

[Claims] 1. A storage unit stores various parameters necessary for displaying a flow rate corresponding to a plurality of display modes so as to be able to call one by one, and stores parameters necessary for displaying a flow rate corresponding to a desired display mode. A mode command switch for selecting a desired flow rate display in a flow meter display device having a display unit for calculating and displaying a predetermined unit flow rate from these parameters and a flow rate signal corresponding to the flow rate of the liquid to be measured. An operation unit provided with a step-up switch and a reset switch for changing the value of the display unit is provided on the display unit, and a plurality of signals are simultaneously output from the operation unit and stored in the storage unit. The parameters stored in the storage unit are sequentially recalled each time a signal is output from each of the mode command switch and the step switch while changing the parameter calling range. A display device for a flow meter, comprising a control unit for displaying and correcting the error.