JP2547867B2 - Operating status display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention is used by being installed in a control panel, a control console or the like for monitoring and operating a plant, and is used for each device constituting the plant. The present invention relates to a driving state display device for monitoring a driving state.

[Conventional technology]

As this type of operating status display device is applied,
For example, there is a reaction tank shown in FIG. This reaction tank 1
It has three types of operation modes: "cooling", "normal temperature", and "heating". By selecting a predetermined operation mode, the temperature inside the tank will be the target temperature (H, M, L) in that operation mode. The heater 2 and the cooling water supply valve 3 are controlled so that That is, as shown in FIG. 5, when a cooling instruction is given when the tank temperature is M, the cooling water supply valve 3 is opened to lower the temperature to L, and the tank temperature is L or M.
At this time, when the room temperature command or the heating command is given, the heater 2 is operated and the bath temperature is raised to M or H, respectively. Furthermore, when the room temperature command is given when the tank temperature is H, the cooling water supply valve 3 is opened and the temperature is lowered to M.

On the other hand, the operation status display device displays the operation mode on the operation mode indicator lamp in response to each operation command. That is, the "cooling" mode is displayed when the cooling command is issued, the "normal temperature" mode is displayed when the room temperature command is issued, and the "heating" mode is displayed when the heating command is issued. In addition, the temperature in the tank indicating the process state at this time is displayed on a temperature indicator, a digital display, or the like. Since such an operation status display corresponds to the operation command on a one-to-one basis, there is an advantage that the operator can easily correspond to the operation.

Then, the operator simultaneously monitors the process value such as the temperature and the operation mode of the equipment by the display of the operation state display device to cope with the change in the process state.

As described above, in the conventional operation status display device, the operation status of the device itself is displayed on the operation mode display light, and the process status of the temperature lamp around the device is displayed on the indicator or the like.

By the way, in the above-mentioned operation status display device, as shown in FIG. 5, while the operation mode is the "heating" mode,
In some cases, the temperature is lower than the target temperature M in the "normal temperature" mode, and it is not possible to simply determine the process state only in the operation mode. Therefore, there is a very high probability that an erroneous operation will occur due to an erroneous recognition of the process state. In particular, when the next step cannot be proceeded unless the target temperature of the operation mode is reached by heating or cooling sufficiently, there is a risk that an erroneous operation may disturb the operation schedule and cause an accident. In addition, an interlock process is required to prevent such an accident, but there is a drawback that the flexibility of driving becomes poor.

[Problems to be Solved by the Invention]

Therefore, since the conventional operation status display device separately displays the operation mode of the equipment and the status of the process,
There is a problem that an erroneous operation due to misidentification is likely to occur.

The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide an operation state display device capable of knowing an operation mode of a device and a process state from the same display, preventing an erroneous operation due to an erroneous recognition, and improving operability.

[Configuration of the Invention] [Means for Solving the Problems] In order to solve the above problems, the present invention relates to a process control device for displaying an operation state of a process control device operating in a plurality of operation modes. Of the current operation mode and whether the process to be controlled is in transition to the target process state in the current operation mode, or has the transition to the target process state in the current operation mode completed. Based on the operating state of the process control device and the state of the process, and whether the process is in transition to the target process state in the current operation mode based on the determination result of the determining unit. And a display means for displaying, together with the current operation mode, whether the transition to the target process state has been completed in this operation mode.

[Operation] By taking the above-described means, the present invention allows the process to be controlled to be in the target process state in the operation mode when the process control device is operating in the operation mode. If the process is in the target process state in the relevant operation mode, the message "Transition completed" is displayed. mode"
Compared with the case where the "measured value" of the current process and the current process are displayed separately at the same time, it is possible to reduce the probability of erroneous operation such as the operator inadvertently issuing a control instruction, and improve operability. You can

[Example] Next, an example in which the present invention is applied to the operation state display device of the reaction tank 1 shown in FIG. 4 will be described.

FIG. 1 is a diagram showing an operating state display device according to an embodiment of the present invention. In the present embodiment, the operation mode of the reaction tank 1 includes each of the “heating”, “normal temperature”, and “cooling” operation modes as described above, and the process condition of the operation state display condition is H (high). And L (low) temperature conditions are used.

The operation status display device shown in FIG. 1 is used to determine in which operation mode the reaction tank 1 is operated and whether the temperature of the reaction tank 1 is in transition to the target temperature that is the target in that operation mode. Whether the transition to the target temperature has been completed is determined by the AND condition of the temperature conditions (H, L) and the operation mode, and the completion or transition to the target temperature in the current operation mode is displayed. is there. That is, a state signal indicating that “heating is in progress” (“heating” mode) and a state signal indicating that “bath temperature H” are input to the first AND circuit 11, and the logical product condition of both is input. When the above condition is satisfied, a logical signal of "1" is output to the indicator lamp 12-1 as a signal indicating that "heating is completed", and this is lit. First NOT
The status signal indicating that the "bath temperature H" and the status signal indicating that "the heating operation is in progress" are input via the circuit 13
When input to the AND circuit 14 and the logical product condition of both is satisfied,
The logic signal is output to the indicator lamp 12-2 as a signal indicating that "there is heating transition" to light it. In addition, a status signal indicating that the "bath temperature H" and a status signal indicating that the "bath temperature L" are input to the OR circuit 15, and a logical signal when the logical sum condition is satisfied and " Operating at room temperature "
(And "normal temperature" mode) status signal and the third AND
When the circuit 16 is input and the logical product condition of the both is satisfied, the logical signal is output to the indicator lamp 12-3 as a signal indicating that "the temperature is being shifted to normal temperature" to light it. Also, via the first NOT circuit 13, a status signal indicating “in-bath temperature H”, a status signal indicating “in normal temperature operation”, and a second NOT circuit 17 The fourth AND circuit 18 inputs the status signal indicating that the "bath temperature L" is input.
, And the logical signal when the logical product condition is satisfied,
As a signal indicating "completion at room temperature", the signal is output to the indicator lamp 12-4 to light it.

In this embodiment, as shown in FIG. 2 and FIG. 3, hysteresis α and β are prepared in the determination logic of the temperature H, and in the “heating” mode, a small hysteresis β is taken and re-set. When the temperature falls below H-β, which is slightly smaller than the temperature H during heating, the temperature H is reset, and
When not in the "heating" mode, a large hysteresis [alpha] is taken so that the temperature H is not reset until it falls below H- [alpha], which is near the target temperature in the "normal temperature" mode.

Next, the operation of this embodiment will be described with reference to FIG. 2 when the operation mode is changed from "normal temperature" mode to "heating"-"normal temperature"-"heating".

First, when the heating instruction is given to the reaction tank 1 in the "heating" mode with the indicator lamp 12-4 lit up after the transition to the target temperature in the "normal temperature" mode is completed, the temperature inside the tank is changed. Until H reaches H, the logical product condition of the second AND circuit 14 is satisfied, so the indicator lamp 12-2 is turned on as an indication that the target temperature of the "heating" mode is being transitioned. Then, when the temperature in the bath 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 lamp 12-1 is turned on. A message indicating that the transition to the target temperature in the "heating" mode has been completed is displayed.

Next, when the normal temperature command is given and it becomes the "normal temperature" mode,
During normal temperature operation, 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 lamp 12-3 lights up, and the "normal temperature" mode is set. The fact that the target temperature is being changed is displayed. At this time, the hysteresis is α, and the temperature H is not reset until the temperature inside the tank falls below H-α in the vicinity of the target temperature in the “normal temperature” mode.

When a heating command is issued before the temperature inside the tank drops to H-α near the target temperature in the "normal temperature" mode, the hysteresis is switched to β, and when the temperature H is slightly lowered, at H-β. The temperature H is reset. As a result, even if the temperature inside the tank has not dropped sufficiently, the temperature condition is
It becomes "L", the logical product condition of the second AND circuit 14 is satisfied, and the display lamp 12-2 is displayed to the effect that "heating is being transferred".

Further, in the same manner as described above, it is possible to display "cooling completed" and "cooling in progress" on the indicator lamp from the AND condition of the cooling operation status signal and the tank temperature status signal.

As described above, according to the present embodiment, in which operation mode the reaction tank 1 is operated, the temperature of the reaction tank 1 is being changed to the target temperature of the operation mode, or when the temperature is changed to the target temperature of the operation mode. Whether or not it is completed is determined by the AND condition of the temperature condition (H, L) and the operation mode, and in which operation mode the current operation state of the reaction tank 1 is being operated and is being transferred to the target temperature of the operation mode. Since it is displayed whether the transition to the target temperature of the operation mode is completed, the operator only monitors the display of the indicator lights 12-1 to 12-4, and whether the temperature is rising or not. It is possible to easily confirm the process state and the operation mode such as whether it is descending, and to know the operation state of the equipment quickly and accurately. Therefore, an erroneous operation by the operator can be effectively prevented.

Further, two hysteresis values for the temperature H reset are set as α and β, and the switching is automatically performed according to the operating state of the hysteresis. Therefore, the temperature condition indicating the process state can be set to H and L. The transition period can be covered by one temperature condition, and the sequence processing amount can be reduced.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, an example is shown in which "transition completed" and "transitioning" to the target temperature of the mode are separately displayed by two indicator lights.
"Transition complete" can be made to light continuously,
By doing this, one indicator light can be used,
The installation area for displays and the like can be reduced.

[Effects of the Invention] As described in detail above, according to the present invention, the operating state of a device and the state of a process can be known from the same display,
It is possible to provide a driving state display device capable of quickly and accurately knowing the driving state of a device and preventing erroneous operation due to erroneous recognition to improve operability.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an operating state display device according to an embodiment of the present invention, FIG. 2 is an operation explanatory diagram of the same embodiment, FIG. 3 is a diagram for explaining a determination logic of a temperature H, and FIG. Is a diagram showing a schematic configuration of a reaction tank having respective operation modes of "heating", "normal temperature" and "cooling", and FIG. 5 is an operation explanatory view of the reaction tank. 1 ... Reactor, 11 ... First AND circuit, 12-1 to 12-4
...... Indicator, 13 ...... First NOT circuit, 14 ...... Second AND circuit, 15 ...... OR circuit, 16 ...... Third AND circuit, 17 ...... Second
NOT circuit, 18 ... Fourth AND circuit.

Claims (1)

(57) [Claims] 1. An operating status display device for displaying the operating status of a process control device operating in a plurality of operating modes, wherein a current operating mode of the process control device and a process to be controlled have an object in the current operating mode. Determination means for determining, based on the operating state of the process control equipment and the state of the process, whether or not the transition to the desired process state has been completed in the current operation mode or the transition to the process state of Based on the determination result of the determination means, it is determined whether the process is in transition to the target process state in the current operation mode or whether the transition to the target process state in the current operation mode is completed. An operating condition display device, comprising: a display unit for displaying the mode together with the mode.