TWI618995B - Pressure sensor and control system - Google Patents

Abstract

A pressure sensor includes a pressure sensing module for sensing an external pressure and converting it into a pressure data, and a processing module operating in a measurement mode or an advanced mode, and accepting an operation to switch the processing module The input module to the advanced mode, a communication interface for communicating with a control host, a memory module for storing a communication setting data, and a display module. When the processing module works in the measurement mode, the display module displays the pressure data and the communication setting data, and when the processing module works in the advanced mode, it controls the display module according to an input signal from the input module. Displaying the communication setting data corresponding to the input signal, and changing the communication setting data according to the input signal, and communicating with the control host by using the changed communication setting data.

Description

Pressure sensor and control system

The invention relates to a pressure sensor, in particular to a pressure sensor and a control system capable of displaying communication setting data.

MODBUS communication protocol is a communication protocol commonly used in industrial control. It defines a standard communication packet format instead of a communication technology. The earliest MODBUS protocol is used in PLC (programmable logic controller, hereinafter referred to as PLC), gradually Many industrial control devices are also beginning to adopt MODBUS as a standard communication format. The MODBUS communication mode mainly includes the RTU mode expressed in binary mode and the ASCII mode using ASCII code. The only difference is that some formats are different (ASCII is transmitted by character encoding). And in low-level hardware control, for example, hardware devices using the RS485 electrical specification most often use the MODBUS RTU mode, which is a binary communication protocol, because the RS485 electrical specification requires that one of the multiple devices connected in parallel The device is used as the main control terminal, and the main control terminal communicates and controls other devices as the controlled terminal, and the MODBUS protocol itself has the architecture of the master and the slave.

In addition, PLCs that have not used the MODBUS protocol in the past are all set up. The transmission port is connected to a plurality of pressure sensors to receive pressure values from the respective pressure sensors, and the display of the conventional pressure sensor displays only the measured pressure value and the preset pressure setting value. However, when the number of pressure sensors to be connected to the PLC is increased, the PLC must set more transmission ports, resulting in an increase in the volume of the PLC and a more complicated circuit. Therefore, if the pressure sensor can be applied to the RS485 electrical specification and communicate with the PLC using the above MODBUS communication protocol, the line and volume of the PLC can be effectively reduced. Therefore, when the pressure sensor is connected to the PLC for the first time, in order to be able to manually set the pressure sensor, the communication setting data can be successfully connected with the PLC, and the pressure sensor needs to be able to be manually set and display the communication setting data. Features.

Accordingly, it is an object of the present invention to provide a pressure sensor suitable for use in a MODBUS communication protocol and capable of manually setting and displaying communication setting data, and a control system including the pressure sensor.

Therefore, the pressure sensor of the present invention can communicate with a control host, and includes: a pressure sensing module for sensing the external pressure and converting into a pressure data; and a processing module electrically connecting the pressure sensing module Receiving the pressure data and operating in a measurement mode or an advanced mode; an input module electrically connected to the processing module and receiving an operation to generate a setting signal, and the processing module is configured according to the setting signal The measurement mode is switched to the advanced mode; a communication interface is electrically connected to the processing module for electrically coupling with the control host for communication; and a memory module electrically connected to the processing mode And storing a communication setting data; and a display module electrically connected to the processing module, and when the processing module operates in the measurement mode, the display module displays the pressure data and the communication setting And the processing module controls the display module to display the communication setting data corresponding to the input signal according to an input signal from the input module, and according to an input mode, The input signal changes the communication setting data, and communicates with the control host by using the changed communication setting data.

In an embodiment of the invention, the input module includes a setting button and a selection button group. When the processing module operates in the measurement mode, the setting button is used to generate the setting signal, and the processing module works. In the advanced mode, the selection key group is used to control the display module to sequentially display a plurality of predetermined communication setting data, and the setting key is used to select one of the communication setting materials displayed by the display module.

In an embodiment of the present invention, the display module has a first display portion, a second display portion, and a third display portion. When the processing module operates in the measurement mode, the processing module The first display unit displays the pressure data, so that the second display unit displays a pressure setting value, so that the third display unit displays the communication setting data used by the pressure sensor, and the processing module operates in the advanced mode. The processing module causes the first display unit to display the communication setting data corresponding to the input signal, and causes the second display unit to display a unit or a name corresponding to the data displayed by the first display.

In an embodiment of the invention, the communication setting data includes a communication Station number, a transmission rate, a transmission format, and/or a communication mode.

In an embodiment of the invention, the pressure sensor further includes an output portion having an element comprising any one of the following combinations: a first combination: a first output module; a second combination: an analog output a third combination: a first output module and a second output module; a fourth combination: a first output module and an analog output module; a fifth combination: a first output module, a a second output module and an analog output module; and a sixth combination: a plurality of output modules and a plurality of analog output modules.

In an embodiment of the invention, the pressure sensor adopts a MODBUS communication protocol, and the communication mode is an RTU mode or an ASCII mode, and the communication mode uses a plurality of function codes, and the function codes respectively represent a station number setting, a current pressure value, a unit value, a decimal point number, a switch operation mode, a switch action type, a switch reaction time, a backlight color selection, a difference setting, a power saving setting, a display fine adjustment range, A transmission rate setting, a transmission format setting, a transmission information format, a factory value reply, an action point setting, a switch state, a lock key function setting value, a pressure category, a switch category setting, and a display update time setting Value, a zero return function, a pressure sensing component abnormality detection state, or an RS-485 line abnormality detection state.

In addition, a control system of the present invention includes the pressure sensor and a control host, the control host includes: a communication unit for electrically coupling with the communication interface of the pressure sensor for communication; and a processing unit, electrical Connect the communication And sending, by the communication unit, a read command to the pressure sensor, causing the pressure sensor to return a data according to the read command, or sending a write command to the pressure sensor through the communication unit, so that the pressure sensor A data is written in accordance with the write command.

In an embodiment of the invention, the pressure sensor has a plurality of, and the control host reads the communication setting data of the pressure sensors and records, and according to the communication setting data of each pressure sensor, passes through the communication unit. Different commands are issued to the pressure sensors, so that the pressure sensors perform different actions according to different instructions.

In an embodiment of the invention, the communication protocol between the pressure sensor and the control host is MODBUS, and the communication mode is RTU mode or ASCII mode.

In an embodiment of the invention, the communication mode uses a plurality of function codes, each of which represents a station number setting, a current pressure value, a unit value, a decimal point number, a switching operation mode, a switch action type, a switch reaction time, a backlight color selection, a difference setting, a power saving setting, a display fine adjustment range, a transmission rate setting, a transmission format setting, a transmission information format, a factory value reply, An action point setting, a switch state, a lock key function set value, a pressure category, a switch category setting, a display update time set value, a return to zero function, a pressure sensing element abnormality detection state, or an RS- 485 line abnormality detection status.

The pressure sensor and the control system of the present invention have at least the following effects: the display module of the pressure sensor can know the communication setting data of the pressure sensor itself (for example, the communication station number), and the operator can adjust the communication by the input module. Set the data so that when the pressure sensor is connected to the control panel for the first time, the operator can manually set the pressure sensor's communication setting data to make the pressure sensor and the control host successfully connected.

1‧‧‧ Pressure sensor

10‧‧‧Processing module

100‧‧‧Control system

11‧‧‧Input module

111‧‧‧Setting button

113‧‧‧Selection key group

12‧‧‧Display module

121‧‧‧First Display Department

122‧‧‧Second display

123‧‧‧ Third Display Department

13‧‧‧ Pressure sensing module

14‧‧‧Power circuit

15‧‧‧Output Department

151‧‧‧First output module

152‧‧‧Second output module

153‧‧‧ analog output module

16‧‧‧Communication interface

17‧‧‧Memory Module

3‧‧‧Control host

30‧‧‧Processing unit

31‧‧‧Display unit

32‧‧‧Input unit

33‧‧‧Transportation unit

331‧‧‧ first input interface

332‧‧‧Second input interface

333‧‧‧ analog input interface

34‧‧‧Power circuit

36‧‧‧Communication unit

S100~S113‧‧‧Steps

Other features and advantages of the present invention will be apparent from the embodiments of the present invention. FIG. 1 is a schematic view of a first embodiment of the control system of the present invention; FIG. 2 is a first embodiment having FIG. 3 is a circuit block diagram of the first embodiment; FIG. 4 is a flowchart of operation of the pressure sensor of the first embodiment; FIG. 5 is a step S109 to S113 of FIG. Figure 6 is a schematic view of a second embodiment of the control system of the present invention; Figure 7 is a schematic view of a third embodiment of the control system of the present invention; Figure 8 is a fourth embodiment of the control system of the present invention A schematic diagram of an embodiment; and FIG. 9 is a schematic diagram of a fifth embodiment of the control system of the present invention.

Before the present invention is described in detail, it should be noted that in the following description In the middle, similar components are denoted by the same reference numerals.

Referring to FIG. 1 to FIG. 3, in an embodiment of the present invention, the control system 100 includes a control host 3 and a plurality of pressure sensors 1 connected in parallel via an RS485 transmission line 200. The control host 3 is used as a master (master), the pressure sensor 1 is used as a controlled terminal (Slave), and the control host 3 transmits through a communication interface, such as RS485, and uses the MODBUS communication protocol and the pressure sensors. 1 communication.

Referring to FIG. 2 and FIG. 3 , the pressure sensor 1 includes a processing module 10 , an input module 11 , a display module 12 , a pressure sensing module 13 , a power circuit 14 , an output unit 15 , and a communication interface 16 . And a memory module 17.

The processing module 10 is a control circuit disposed inside the pressure sensor 1 , and electrically connected to the input module 11 , the display module 12 , the pressure sensing module 13 , the power circuit 14 , the output unit 15 , the communication interface 16 , and the memory module 17, and can work in a measurement mode or an advanced mode.

The input module 11 includes a setting button 111 and a selection button group 113 (FIG. 2). When the processing module 10 operates in the measurement mode, the setting button 111 accepts a manual operation to generate a setting signal to the processing module 10. The processing module 10 is switched from the measurement mode to the advanced mode according to the setting signal. The selection key group 113 has, for example, a forward key and a back key, and when the processing module 10 operates in the advanced mode, The selection key group 113 is configured to select one of the plurality of predetermined communication setting data sequentially displayed in the display module in the forward or backward direction. The communication setting data includes a communication station number, a transmission Rate, a frame or a communication protocol. The communication station number ranges from 0 to 255, the transmission rate includes 19200 or 9600 bits/second, the transmission format includes n81, E81 or 081, and the communication mode uses the ASCII or RTU communication mode of the MODBUS protocol. The processing module 10 will communicate with the control host 3 according to the selected communication setting data.

The communication interface 16 is configured to send a data corresponding to the Modbus protocol transmitted by the processing module 10 to the control host 3, or receive a command from the control host 3 that conforms to the Modbus protocol to the processing module 10, in this embodiment. The communication interface 16 is an RS485 connector. The memory module 17 is configured to store the communication setting data. It should be noted that a microprocessor using a built-in memory function in other embodiments is also applicable to the present invention, and is not limited to the circuit of FIG.

The pressure sensing module 13 is configured to sense the external pressure and convert it into a pressure data and provide the pressure data to the processing module 10 for digitizing the pressure data by the processing module 10. The display module 12 is electrically connected to the processing module 10 and has a first display portion 121, a second display portion 122, and a third display portion 123 (FIG. 2). In the measurement mode, the processing module is The outputting of the pressure data to the first display unit 121 is performed to display the pressure data. The second display unit 122 is configured to display a pressure setting value provided by the processing module 10, and the third display unit 123 is configured to display the pressure data. Displaying the communication setting data (including the communication station number, the transmission rate, the transmission format, or the communication mode) provided by the processing module 10 and currently being used by the pressure sensor 1, and the data can be set by the processing module 10 to be, for example, by Three display In the advanced mode, the processing module 10 causes the first display unit 121 to display the communication setting data. At this time, the user can change the first display by operating the input module 11. The unit 121 displays the communication setting data, and the processing module 10 causes the second display 122 to display the unit or name of the data displayed by the first display 121, and the processing module 10 performs the change according to the communication setting data with the control host 3. communication.

The control unit 3 has a processing unit 30, a display unit 31, an input unit 32, a transmission unit 33, a power supply circuit 34 and a communication unit 36, and the communication unit 36 communicates with each of the pressure sensors via the RS485 transmission line 200 of FIG. The communication interface 16 of the first embodiment is electrically coupled, so that the processing unit 30 of the control unit 3 can transmit commands to the pressure sensors 1 through the communication unit 36, so that the pressure sensors 1 perform related actions according to the received instructions. In the example, the communication unit 36 is an RS485 connector. The control host 3 can be, but is not limited to, a programmable logic controller (PLC), the input unit 32 is for the user to input an operation command, the display unit 31 is for the user to view the operation result, and the power circuit 34 is used to supply 24V DC power. Power circuit 14. In other embodiments, an external power source (not shown) can also be used to supply power to the power circuit 14, not limited by the circuit of FIG.

The output unit 15 of the pressure sensor 1 has a first output module 151, a second output module 152 and an analog output module 153, and the transmission unit 33 of the control unit 3 has a first output module 151 and a second The output module 152 and the analog output module 153 correspond to a first input interface 331, a second input interface 332, and an analog input interface. 333. The first output module 151 is electrically connected to the first input interface 331 for transmitting a digital data representing on/off. For example, if the pressure sensor 1 includes a switching component, and in the measurement mode, when the pressure sensor 1 When the measured pressure value (displayed on the first display portion 121) is greater than the pressure set value (displayed on the second display portion 122), the pressure sensor 1 controls the switching element to be turned on or off, and correspondingly generates a representative switch element to be turned on or off. The on/off digital data is transmitted to the control host 3 through the first output module 151. Similarly, if the pressure sensor 1 further includes the second switching element, the second output module 152 is electrically connected to the second input. The interface 332 is configured to transmit another digital data of the on/off of the on/off of the second switching element to the control host 3, so that the pressure sensor 1 can include more than two switching elements, and The output module corresponding to the number of switching elements transmits the on/off digital data corresponding to the on or off of the switching elements to the control host 3; the analog output module 153 is electrically connected to the analog output. The interface 333 is configured to transmit the above pressure data (for example, an analog voltage of 1 to 5 V or an analog current of 4 to 20 mA, etc.).

In this embodiment, the communication unit 36 of the control host 3 is electrically connected to the communication interface 16 of the pressure sensor 1 through the RS485 transmission line 200 as shown in FIG. Thereby, the processing unit 30 of the control host 3 can send a read command to the pressure sensor 1 through the communication unit 36, so that the pressure sensor 1 returns a read data to the control host 3 according to the read command, or through the communication. The unit 36 sends a write command to the pressure sensor 1 to cause the pressure sensor 1 to write a data to the processing module of the pressure sensor 1 according to the write command. In the temporary memory or memory module 17 of the 10, the pressure sensor 1 returns a write confirmation message to notify the control host 3 whether or not the write operation is completed.

Referring to FIG. 4 and FIG. 5, the operation flow of the pressure sensor 1 includes: controlling the host 3 and the pressure sensor 1 to turn on the power (step S100); and the pressure sensor 1 turns on the power every time (including the first use), and the processing module 10 will set the communication protocol parameters of the pressure sensor 1 itself (step S101), which is usually the factory default value (when used for the first time) or the set value before the last shutdown, for example, representing the use of the MOSBUS protocol. Parameter; set its own station number value (usually the factory default value 1 or the previous set value before the shutdown) (step S102); set its own transmission rate value (usually the factory default value or before the last shutdown) Setting value, for example, 19200 bits/second) (step S103); setting the own transmission format (usually the factory default value or the setting value before the last shutdown, for example, n81) (step S104), setting the communication itself Mode (usually the factory preset value or the set value before the last shutdown, such as RTU or ASCII) (step S105), and after the pressure sensor 1 is turned on, the processing module 10 is preset to operate in the measurement mode, and Receiving the pressure sensing module 13 In the measurement mode, the processing module 10 causes the first display unit 121 of the display module 12 to display the pressure data (ie, the currently measured pressure value), so that the second display unit 122 displays the pressure setting value. The third display unit 123 displays the current communication setting data of the pressure sensor 1 (including the communication station number, the transmission rate, the transmission format, and/or the communication mode, and the information can be set by the processing module 10 to be displayed in turn, for example, or only a), so in the measurement mode, by means of The information displayed by the module 12 is displayed by the operator, and the operator can clearly know the communication station number, transmission rate, transmission format and/or communication mode of the pressure sensor 1; then, the control host 3 transmits commands to the pressure sensor 1 (step S106). ).

Next, the control host 3 determines whether the pressure sensor 1 returns a data or message corresponding to the command to determine whether the connection is successful (step S107), and if successful, the control host 3 continues to transmit the command to the pressure sensor 1 (step S108). If the connection fails, the pressure sensor 1 does not return the data or message corresponding to the command. For example, the transmission rate, transmission format and/or communication mode set by the pressure sensor 1 are different from the control host 3, or multiple pressure sensors 1 are transmitted back. Data or messages from the same station number, for example, when five connections are connected to the control panel 3 and all have the same station number, the control panel will receive 5 data or messages from the same station number. However, the source cannot be identified. At this time, the operator needs to manually adjust the communication setting data of the pressure sensor 1 through the input module 11 of the pressure sensor 1.

Therefore, for the pressure sensor 1 that needs to set the communication setting data, the operator presses the setting button 111 of the pressure sensor 1 for more than 5 seconds (step S109 of FIG. 5), and the processing module 10 according to the setting signal from the setting button 111, Switching from the measurement mode to the advanced mode, and as shown in step S109 of FIG. 5, in the measurement mode, the first display portion 121 is originally displaying a pressure value, for example, 0, and the second display portion 122 is originally displaying the set pressure. Value, for example 500. Then, after entering the advanced mode, as shown in step S110 of FIG. 4 and FIG. 5, the operator can manually adjust the communication setting by selecting the key group 113. The data processing module 10 can assist the operator to manually set the data by selecting the key group 113. For example, manually setting the station number value by the selection key group 113, for example, pressing the setting button (SET) 111, the processing module 10 The second display unit 122 displays "ld" as the station number. At this time, the station number value is manually set by the selection key group 113. For example, the first display unit 121 displays the previously set station number value as 1, and presses the forward button once. The station number value is +1, the back button is pressed once, the station number value is -1, and so on, until the first display portion 121 displays the station number value that the operator wants to set, and the operator presses the setting button 111 again to process the mode. The group 10 completes the station number setting based on the input signal from the input module 11.

Next, as shown in step S111 of FIG. 4 and FIG. 5, the second display unit 122 displays "rAt" as a unit of the transmission rate. At this time, the operator can select the key group 113 to manually set the transmission rate value (step S111), for example, press With the forward button, the first display portion 121 displays the next transmission rate (for example, 96 (representing 9600 bits/second)), and the back display button is pressed, and the first display portion 121 displays the previous transmission rate (for example, 192 (representing 19200 bits/ Second)), and when the first display unit 121 displays the transmission rate to be set, press the setting button 111 again, and the processing module 10 completes the transmission rate setting based on the input signal from the input module 11.

Next, as shown in step S112 of FIG. 4 and FIG. 5, the second display unit 122 displays "For" as the transmission format. At this time, the operator can select the key group 113 to manually set the transmission format (step S112), for example, press the forward key or the backward. The first display unit 121 displays different transmission formats in sequence, for example, the first display unit 121 sequentially displays "n81", "EUE", and "odd" respectively represent three transmission formats of n81, E81, and 081. Therefore, if the E81 transmission format is to be set, when the first display unit 121 displays EUE, the setting key 111 is pressed, and the processing is performed. The module 10 completes the transmission format setting according to the input signal from the input module 11.

Next, as shown in step S113 of FIG. 4 and FIG. 5, the second display unit 122 displays "nod" to represent the communication mode. At this time, the operator can select the key group 113 to manually set the communication mode (step S113), for example, press the forward key or the backward The key, the first display unit 121 will alternately display "rtu" for the RTU mode, or display "ASC" for the ASCII mode, so if the RTU mode is to be set, when the first display portion 121 displays "rtu", press the set button. 111. The processing module 10 completes the communication mode setting according to the input signal from the input module 11.

Of course, the above setting steps S110-S113 are not necessarily all performed, and only one or two steps may be performed as needed. For example, if the transmission rate is set in step S111, the pressure sensor 1 enters the advanced mode. (That is, in step S110), the setting key 111 is continuously pressed twice, and the second display unit 122 displays "rAt" (indicating the entry transmission rate setting function), and the transmission rate setting can be performed. When the setting is completed, the pressure sensor 1 will automatically switch back to the measurement mode. At this time, the third display unit 123 of the display module 12 displays the updated communication setting data of the pressure sensor 1 (including the communication station number, transmission rate, transmission). Format and/or communication mode, and the information can be set to, for example, rotate display or display only one of them). after that The control host 3 is repeatedly executed in the above step S106, and attempts to reconnect with the reset pressure sensor 1. If the connection is still not possible, the operator repeats the above steps S109 to S113 as needed until the control unit 3 and the pressure sensor 1 are connected. After successful connection, the control host 3 can continuously transmit commands to the associated pressure sensor 1. That is, after the control host 3 is successfully connected to the pressure sensors 1, since the control host 3 has learned the station number of each pressure sensor 1, the control host 3 can transmit different read/write commands to different pressures. Sensor 1, even changing the station number of pressure sensor 1.

In the present embodiment, the function code reference table used by the pressure sensor 1 in the RTU communication mode is as follows.

The abnormal code used by the pressure sensor 1 in the RTU communication mode is as follows.

The following provides several examples of the relevant control commands and data formats in the RTU communication mode, wherein the check code is in the form of a Cyclic Redundancy Code Check (CRC).

Example 1: The format of the read command transmitted by the control host 3 is as follows.

In the first example, the format of the read data of the pressure sensor 1 is as follows.

Example 2: The format of the write command transmitted by the control host 3 is as follows.

In the second example, the format of the write command responded by the pressure sensor 1 is as follows.

Example 3: The format of the pressure sensor 1 in response to the abnormal data is as follows.

Example 4: The format of the read/write code of the control host 3 is as follows.

Example 5: In the example in which the control host 3 reads the pressure value of the pressure sensor 1, the format of the data transmitted by the control host 3 to the pressure sensor 1 is as follows.

In the fifth example, the format of the data returned by the pressure sensor 1 corresponding to the transmission data of the control host 3 is as follows.

Example 6: In the example in which the control host 3 sets the station number of the pressure sensor 1, the format of the format transmitted by the control host 3 to the pressure sensor 1 is as follows.

In the sixth example, the format of the pressure sensor 1 corresponding to the data transmitted by the control host 3 is as follows.

Example 7; It is assumed that the setting data sent by the control host 3 to the pressure sensor 1 is out of range, and the format of the data transmitted by the control host 3 to the pressure sensor 1 is as follows.

In the seventh example, the data format of the pressure sensor 1 corresponding to the data sent by the control host 3 is as follows. When the pressure sensor 1 replies as an abnormal code, the MSB is set to 1, so the code written is 86H.

In the present embodiment, the function code reference table used by the pressure sensor 1 in the ASCII communication mode is as follows.

The error code used by pressure sensor 1 in ASCII communication mode is as follows.

The following provides several examples of related control commands and data formats in the ASCII communication mode. The check code is a Longitudinal Redundancv Check (LRC).

Example 8: The format of the read command transmitted by the control host 3 is as follows.

In the eighth example, the format of the read data of the pressure sensor 1 is as follows.

Example 9: The format of the write command transmitted by the control host 3 is as follows.

In Example 9, the format of the data written by the pressure sensor 1 is as follows.

Example 10: When an abnormal condition occurs, the format of the abnormal data sent by the pressure sensor 1 is as follows.

Example 11: Controlling the format content of the read/write code of the host 3 as under.

Example 12: In the example in which the control host 3 reads the pressure value of the pressure sensor 1, the format of the data transmitted by the control host 3 to the pressure sensor 1 is as follows.

In the example twelve, the format of the data returned by the pressure sensor 1 corresponding to the data transmitted by the control host 3 is as follows.

Example 13: In the example in which the control host 3 sets the communication station number of the pressure sensor 1, the format of the data transmitted by the control host 3 to the pressure sensor 1 is as follows.

In the thirteenth embodiment, the format of the data returned by the pressure sensor 1 corresponding to the data transmitted by the control host 3 is as follows.

Example 14; assume that the setting data sent by the control host 3 to the pressure sensor 1 is out of range, for example, the format content of the data sent by the control host 3 to the pressure sensor 1. as follows.

In the fourteenth example, the format of the data returned by the pressure sensor 1 corresponding to the data sent by the control host 3 is as follows. When the pressure sensor 1 replies as an abnormal code, the MSB is set to 1, so the code written is 38H36H. .

Referring to FIG. 6, the second embodiment of the present invention has the same component connection relationship and function principle as that of FIG. 3, except that the output portion 15 of the pressure sensor 1' has the first output module 151 but no second output module. 152 and analog output module 153.

FIG. 7 is a view showing the third embodiment of the present invention having the same component connection and operation principle as that of FIG. 3, except that the output portion 15 of the pressure sensor 1" has the first output module 151 and the second output module 152. Analogless output module 153.

FIG. 8 is the same as the component connection relationship and the principle of operation of the fourth embodiment of the present invention, and the output unit 15 of the pressure sensor 1 ′′′ has a first output module 151 and an analog output module 153 . However, there is no second output module 152.

Figure 9 is a view showing the fifth embodiment of the present invention having the same component connection and operation principle as that of Figure 3, except that the output portion 15 of the pressure sensor 1"" has an analog output module 153 but no first output mode. Group 151 and second output module 152. Other embodiments may also include a plurality of output modules and a plurality of analog output modules.

In summary, the pressure sensor 1 and the control system 100 of the present invention have at least the following effects: through the display module 12 of the pressure sensor 1, the operator can know the communication setting data of the pressure sensor 1 itself (eg, the communication station number). And the input setting module 11 can adjust the communication setting data of the pressure sensor 1 to enable the pressure sensor 1 to successfully establish a connection with the control host 3, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

Claims (8)

A pressure sensor capable of communicating with a control host, and comprising: a pressure sensing module for sensing an external pressure and converting into a pressure data; and a processing module electrically connecting the pressure sensing module to receive the pressure And operating in a measurement mode or an advanced mode; an input module electrically connected to the processing module and receiving an operation to generate a setting signal, and the processing module is measured by the setting signal according to the measurement signal Switching to the advanced mode; a communication interface electrically connected to the processing module for electrically coupling with the control host for communication; a memory module electrically connecting the processing module and storing a communication setting And a display module electrically connected to the processing module, and when the processing module operates in the measurement mode, the display module displays the pressure data and the communication setting data, and the processing module When the operation mode is in the advanced mode, the processing module controls the display module to display the communication setting data corresponding to the input signal according to an input signal from the input module, and according to the input signal Change the setting data communication, and the communication to the changed configuration data to the control host communication. The pressure sensor of claim 1, wherein the input module comprises a setting button and a selection button group. When the processing module operates in the measuring mode, the setting button is used to generate the setting signal, and the processing is performed. When the module works in the advanced mode, the selection key group is used to control the display module to sequentially display multiple presets. The setting data of the communication is set, and the setting button is used to select one of the communication setting materials displayed by the display module. The pressure sensor of claim 1, wherein the display module has a first display portion, a second display portion, and a third display portion. When the processing module operates in the measurement mode, the processing module The first display unit displays the pressure data, and causes the second display unit to display a pressure setting value, so that the third display unit displays the communication setting data used by the pressure sensor, and the processing module works in the In the step mode, the processing module causes the first display unit to display the communication setting data corresponding to the input signal, and causes the second display unit to display a unit or a name corresponding to the data displayed by the first display. The pressure sensor of claim 1, wherein the communication setting data comprises a communication station number, a transmission rate, a transmission format, and/or a communication mode. The pressure sensor of claim 1, further comprising an output portion having an element comprising any one of the following combinations: a first combination: a first output module; a second combination: an analog output module The third combination: a first output module and a second output module; a fourth combination: a first output module and an analog output module; a fifth combination: a first output module, a second The output module and the analog output module; and the sixth combination: a plurality of output modules and a plurality of analog output modules. A control system comprising the pressure sensor of any one of claims 1 to 5 and a control host, the control host having: a communication unit for electrically coupling with the communication interface of the pressure sensor And the processing unit is electrically connected to the communication unit, and sends a read command to the pressure sensor through the communication unit, so that the pressure sensor returns a data according to the read command, or passes the communication unit Sending a write command to the pressure sensor causes the pressure sensor to write a data according to the write command. The control system of claim 6, wherein the pressure sensor has a plurality of, and the control host reads the communication setting data of the pressure sensors and records the data, and according to the communication setting data of each pressure sensor, The communication unit issues different commands to the pressure sensors, so that the pressure sensors perform different actions according to different instructions. The control system of claim 6, wherein the communication protocol between the pressure sensor and the control host is MODBUS, and the communication mode is RTU mode or ASCII mode.