JPH03132809A - Operating state display device - Google Patents

Abstract

PURPOSE:To prevent the misoperations due to the misrecognition and to improve the operability of an operating state display device by discriminating a specific mode to be set or a specific ended mode based on the working state of an equipment and the state of a process and displaying the present operating state which is under shift to a prescribed mode or through with the shift based on the result of said decision. CONSTITUTION:The discrimination means 11, 14, 16 and 18 discriminate a spe cific present operating mode to be set for an equipment or a specific shifted operation mode based on the working state of the equipment and the state of a process respectively. Then the display means 12-1 - 12-4 display a specific operating mode to be set for the operating state of the equipment or a specific shifter mode respectively based on the deciding results of means 11 - 18. In such a constitution, both the working state of the equipment and the state of the process can be known from the same display. Then it is possible to quickly and exactly know the operating state of the equipment, to prevent the misoperations due to the misrecognition, and to improve the operability of an operating state display device.

Description

[Detailed Description of the Invention] [Object of the Invention] [Field of Industrial Application] The present invention is used by being installed in, for example, a control panel, a control console, etc. for monitoring and operating a plant, and is used to monitor and operate each device that constitutes the plant. The present invention relates to an operating state display device for monitoring operating states.

[Latest technology]

An example to which this type of operating state display device is applied is a reaction tank shown in FIG. 4. This reaction tank 1 is
It has 3 FIi operation modes: "cooling", "normal temperature", and "heating", and by selecting the predetermined operation mode,
The temperature inside the tank is the target temperature in that operation mode (H, M, L)
The heater 2 and the cooling water supply valve 3 are controlled so that

That is, as shown in FIG. 5, when a cooling command is given when the tank internal temperature is M, the cooling water supply valve 3 is opened and the temperature is lowered to L, and the tank internal temperature is lowered to L or M. When a room temperature command or a heating command is given at this time, the heater 2 is operated and the temperature inside the tank is raised to M or H, respectively. Further, when a normal temperature command is given when the tank internal temperature is H, the cooling water supply valve 3 is opened and the temperature is lowered to M.

On the other hand, the driving state display device displays the driving mode in response to each operation command on the driving mode indicator light.

That is, when a cooling command is issued, a "cooling" mode is displayed, when a normal temperature command is issued, a "normal temperature" mode is displayed, and when a heating command is issued, a "heating" mode is displayed. Note that the temperature inside the tank, which indicates the state of the process at this time, is displayed on a temperature indicator, digital display, or the like.

Such a driving state display has an advantage in that it is easy for the operator to correspond to the operation because it corresponds one-to-one with the operation command.

The operator simultaneously monitors process values such as temperature and the operating mode of the equipment using the display provided by the operating state display device, thereby responding to changes in the process state.

As described above, the conventional operating state display device displays the operating state of the device itself on the operating mode indicator light, and displays the state of the process surrounding the device, such as temperature, on an indicator or the like.

By the way, in the above-mentioned operating state display device, as shown in FIG. 5, even though the operating mode is "heating" mode, "
The temperature may be lower than the target temperature M in the "normal temperature" mode, and the state of the process cannot be determined simply based on the operation mode alone. Therefore, there was a very high probability that an erroneous operation would occur due to a misunderstanding of the process status. Particularly, when the next step cannot proceed unless the temperature has been sufficiently heated or cooled to reach the target temperature of the operating mode, there is a risk that an erroneous operation may disrupt the operating schedule and cause an accident. Further, interlock processing is necessary to prevent such accidents, but there is a drawback that driving flexibility is reduced.

[Problem to be solved by the invention]

Therefore, since the conventional operating state display device displays the operating mode of the equipment and the state of the process separately, there is a problem in that there is a high probability that erroneous operation due to misidentification will occur.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to know the operating mode of equipment and the process status from the same display, and to improve operability by preventing erroneous operations due to misidentification. The purpose of the present invention is to provide a status display device.

[Structure of the Invention] [Means for Solving the Problems] In order to solve the above problems, the present invention provides an operating state display device that displays the operating state of equipment that controls a process in a plurality of operating modes, in which the equipment is a determining means for determining to which operating mode the transition is currently being made or to which operating mode the transition has been completed based on the operational state of the equipment and the process state; and based on the determination result of the determining means. and a display means for displaying to which operating mode the operating state of the device is being shifted or to which operating mode the shifting has been completed.

[Effect]

By taking the above-described measures, the present invention can determine to which operating mode the equipment is transitioning to or to which operating mode the transition has been completed based on the operating state of the equipment and the process status. Based on the determination result, the current operating state of the device is displayed on the display means as being in transition to a predetermined operation mode or as having completed transition to a predetermined operation mode. Therefore, the display of the operating status includes the process status in the operating mode determined by the operating status of the equipment, allowing operators to quickly and accurately know the current operating mode and process status, and preventing erroneous operations due to misidentification. can be effectively prevented.

〔Example〕

Next, a description will be given of an embodiment in which the present invention is applied to an operating state display device for the reaction tank 1 shown in FIG.

FIG. 1 is a diagram showing an operating state display device according to an embodiment of the present invention. In this example, the operation mode of the reaction tank 1 is "heating" as described above.

There are two operating modes: "normal temperature" and "cooling", and two temperature conditions, H (high) and L (low), are used as process conditions for the operating state display conditions.

The operating state display device shown in FIG. 1 indicates to which operating mode the reaction tank 1 is transitioning or to which operating mode the transition has been completed, based on temperature conditions (H).

It is determined based on the AND condition of L) and the driving mode, and indicates whether a predetermined driving mode has been completed or is in transition. That is, a state signal indicating that the heating operation is in progress ("heating" mode) and a state signal indicating that the "temperature in the tank is H" are input to the first AND circuit 11, and the logical product condition of the two is inputted to the first AND circuit 11. When this is established, a logic signal of "1" is output to the indicator lamp 12-1 as a signal indicating that "heating is complete", and the indicator lamp 12-1 is turned on. Further, the state signal inputted through the first NOT circuit 13 indicating that the temperature inside the tank is H, and the state signal indicating that the heating operation is in progress are outputted to the second AND circuit 14.
When the logical product condition of both is satisfied, the logical signal is sent to the indicator light 12- as a signal indicating that "heating transition is in progress".
2 and make it light up. In addition, a status signal indicating that "temperature inside the tank is H" and "temperature inside the tank L" are displayed.
The logic signal when the logical sum condition is satisfied is input to the OR circuit 15, and the state signal indicating that
(“normal temperature” mode) and the third AN
When the logical product condition of both is satisfied by inputting the D circuit 16 manually, the logical signal is outputted to the indicator lamp 12-3 as a signal indicating that "transferring to normal temperature", and this is turned on. . In addition, a status signal indicating that the temperature inside the chamber is “H” inputted via the first NOT circuit 13 and a status signal indicating that the status signal is “operating at room temperature” are inputted via the second NOT circuit 17. The input state signal indicating that the temperature inside the tank is L is inputted to the fourth AND circuit 18, and the logical signal when the logical product condition is satisfied is used as a signal indicating that the temperature is at normal temperature.
The signal is outputted to the indicator lamp 12-4, and the indicator lamp 12-4 is turned on.

In addition, in this embodiment, as shown in FIGS. 2 and 3, hysteresis α and β are prepared in the discrimination logic for temperature H, and in the “heating” mode, a small hysteresis β is taken and the re-operation is performed. When the temperature H drops below H-β, which is a slightly smaller value than the temperature H during heating, the temperature H is reset.
When the mode is other than "heating" mode, a large hysteresis α is provided so that the temperature H is not reset until it falls below H-α, which is near the target temperature in the "normal temperature" mode.

Next, as an effect of this embodiment, the case where the operation mode is changed from the "normal temperature" mode to "heating" = "normal temperature" - "heating" will be described with reference to FIG. 2.

First, the transition to "normal temperature" mode is completed, and the indicator light 12
-4 is lit, when a heating command is given to the reaction tank 1 to set it to "heating" mode, the logical product condition of the second AND circuit 14 is satisfied until the temperature inside the tank reaches H. Therefore, as an indication that it is transitioning to "heating" mode,
The indicator light 12-2 is turned on. Then, when the temperature inside the tank exceeds H, the logical product condition of the second AND circuit 14 is not satisfied, and instead the logical product condition of the first AND circuit 11 is satisfied, and the indicator light 12-1 lights up. A message indicating that the transition to the "heating" mode has been completed is displayed.

Next, when a room temperature command is given and the "normal temperature" mode is entered, the room temperature operation is started and the logical product condition of the first AND circuit 11 is not satisfied, and instead the logical product condition of the third AND circuit 16 is satisfied. , the indicator light 12-3 lights up to indicate that the mode is being shifted to the "normal temperature" mode. At this time, the hysteresis is α, and the temperature H is not reset until the temperature inside the tank falls below H−α, which is near the target temperature in the “normal temperature” mode.

Then, the temperature inside the tank is H near the target temperature in "normal temperature" mode.
If a heating command is issued before the temperature drops to -α, the hysteresis is switched to β, and when the temperature drops slightly below the temperature H, the temperature H is reset at H-β. As a result, even if the temperature inside the tank has not fallen sufficiently, the temperature condition is “L”.
``, the logical product condition of the second AND circuit 14 is satisfied, and the indicator light 12-2 displays ``Heating transition in progress''.

Furthermore, in the same manner as described above, it is possible to display "cooling complete" and "cooling transition in progress" on the indicator light based on the AND condition of the state signal during the cooling operation and the state signal of the tank internal temperature.

As described above, according to this embodiment, it is possible to determine which operation mode the reaction tank 1 is in transition to or which operation mode the transition to has been completed based on the AN between the temperature conditions (H, L) and the operation mode.
D conditions are used to display the current operating state of the reaction tank 1, which operating mode it is transitioning to, and which operating mode the transition has been completed to, so the operator can use the indicator light 12. By simply monitoring the displays from 1 to 12-4, you can easily check the process status and operation mode, such as whether the temperature is rising or falling, and quickly and easily check the operating status of the equipment. You can know exactly. Therefore, erroneous operations by the operator can be effectively prevented.

Also, 2! Two hysteresis values α and β are set for the i-degree H reset, and this hysteresis is automatically switched depending on the operating status, so the temperature conditions that indicate the process status can be set to two, H and L, and mode transition is possible. This can be done under one temperature condition, and the amount of sequence processing can be reduced.

Note that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the mode "Complete" and "Transitioning" are displayed separately with two indicator lights, but "Transitioning" is displayed with a flicker, and "Complete" is lit continuously. By doing so, one indicator light can be used for each visit, and the installation area for displays, etc. can be reduced.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to know the operating status of the equipment and the process status from the same display, and the operating status of the equipment can be known quickly and accurately. It is possible to provide a driving status display device that can prevent erroneous operations due to misidentification and improve operability.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an operating state display device according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the embodiment, Fig. 3 is a diagram for explaining the logic for determining temperature H, and Fig. 4 5 is a diagram showing a schematic configuration of a reaction tank having operating modes of "heating", "room temperature", and "cooling", and FIG. 5 is an explanatory diagram of the operation of the reaction tank. DESCRIPTION OF SYMBOLS 1... Reaction tank, 11... 1st AND circuit, 12-
1 to 12-4... Indicator light, 13... First NOT circuit, 14... Second AND circuit, 15... OR circuit, 16 Third AND circuit, 17... Third 2 NOT circuit, 8...4th AND circuit.

Claims (1)

[Claims] In an operating status display device that displays the operating status of equipment that controls a process in multiple operating modes, the equipment can display to which operating mode the equipment is currently transitioning or to which operating mode the transition has been completed. A determining means for determining based on the operating state and the process state, and based on the determination result of this determining means, it is determined to which operating mode the operating state of the equipment is transitioning or to which operating mode the transition has been completed. 1. An operating state display device comprising: a display means for displaying whether or not the operating status is displayed.