JPH04178705A - Diagnostic device - Google Patents

Abstract

PURPOSE:To eliminate the need for frequency access from a host CPU to an interface device by storing a memory with the contents of an event request to a transmitter at each time, and transferring the data to the host CPU and predicting a diagnosis time when the frequency of the storage exceeds a specific value. CONSTITUTION:A portable setter 6 is connected to the transmitter 1 through a transmission line at a job site and the settings of the transmitter 1 are changed at the job site. The data are sent to the interface device 4 through the transmission line 3 and stored in the memory 43 through a transmission/ reception part 41 and a CPU 42. The memory 43 is therefore stored with both data accessed by the host computer 5 and setter 6. The CPU 42 controls the number of the data and when the data are stored exceeding the specific value, the data are transferred to the host computer 5, which analyzes the data to judge a period where maintenance is required. Consequently, the host CPU need not access the interface device 4 frequently.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention records the d history of a transmitter used in a process control device, and when the number of times the data is stored exceeds a predetermined value, the stored data is This relates to a diagnostic device that is transmitted to an external device and predicts maintenance timing.

[Prior Art] Generally, in a process control device, on-site equipment and equipment in a control room are connected through a transmission path. The status of the field equipment is then modulated by the transmitter and sent to the control room, so that the management room can know the state of the field equipment by analyzing the signal.

In order to monitor and manage the transmitter, which is a field device, this device has one host computer and multiple interface modules (inserted into the transmission path for each field device, which interface with the host computer and control the transmission path). It consists of an interface device with a Then, the transmitter is set to the content in response to an event request from the host CPU via the interface module, and when necessary, is set to the content in response to the event request from the portable setting device connected to the transmission line near the field equipment. ing. These events are also stored in the memory of the interface device.

[Problem to be Solved by the Invention 1] However, in such a conventional device, although event request contents from a portable setting device made at the site can be stored in the CPU in the interface device, they cannot be stored in the host CPU.
Since it is not transferred in real time to the upper C
It is not possible to store data in the PU memory every time an event occurs in the portable setting device.Also, it is possible to import the data in the interface module by periodically requesting an event from the host CPU, but the host CPU has a large capacity. Since memory is required and the event becomes a disturbance to control looseness, it is undesirable to make more event requests than necessary.

[Means for Solving the Problem 1] A storage means for storing event requests from the host CPU and event request history from the portable setting device, and a storage means for storing event requests from the host CPU and a history of event requests from the portable setting device, and a system that notifies the host computer of this fact when the number of times the history is stored exceeds a predetermined value. The system is equipped with a notification means for notifying, and a judgment means for receiving data stored in the storage means by a host computer or the like that has received the notification, analyzing the data, and predicting the maintenance time.

[Function J: Every time there is an event request from the host CPU or portable setting device, the history is stored in the storage means, and when the number of times it is stored exceeds a predetermined value, the host computer is notified of this, so the host computer The data in the storage means is taken in and processed to determine when it is time for maintenance.

[Embodiment] FIG. 1 is a block diagram showing an embodiment of the present invention.
1 is a transmitter placed at the site to detect and transmit process values from a process control device, etc.; 2 is a receiving instrument that detects the data transmitted by transmitter 1 and monitors the process control device; 3 is a transmitter. a transmission line connecting between 1 and the receiving instrument 2;
4 is an interface device inserted into the transmission path 3, and 5 is a host computer that generates an event request and accesses the transmitter 1 via the ink-face device W4. Although the figure only shows the circuit for the 11% 1 minute oscillator,
Data management for each transmitter is done in the same way.

The interface device M4 includes a transmitting/receiving section 41, a CPU 42,
It is composed of a memory 43 and an interface section 44, and when the host computer 5 generates an event request, the signal is supplied to the CPU 42 via the interface g44, where it generates a signal for changing the settings of the transmitter 1, for example. , the signal is supplied to the transmitter 1 via the transmitting/receiving section 41. The contents of the event request are then stored in the memory 43.

On the other hand, the portable setting device 6 may be connected to the transmitter 1 via the transmission path 3 at the site, and the settings of the transmitter 1 may be changed at the site. This data is sent to the interface device W4 via the transmission line 3, and sent and received by the CPU
The data is stored in the memory 43 via 42. Therefore, the memory stores both data accessed by the host computer and data accessed by the portable setting device 6 at the site.

The CPU 42 manages the number of this data, and when data exceeding a predetermined value is stored, the data is transferred to the host computer 5, and the host computer 5 analyzes the data and determines when maintenance is required. do.

FIG. 2 is a flowchart showing the operation of this device,
Figure 2 (a) shows the flow of the host computer, which sequentially checks whether the flags indicating that the memories of multiple setting device modules are full are set. For the setting device, transfer/
It is designed to perform diagnostic processing.

Step 100! If it is determined in step 100 that the process is not finished, the memory full flag shown in step 100□ is determined. This is a flag to notify when the memory 43 in FIG. 1 is full. If this flag is set, the data is transferred to the higher-level computer 5 as shown in step 101□, and the higher-level computer 5 determines when it is time for maintenance.

The above is the operation for one transmitter, but whether or not this memory full flag is set is determined for each transmitter, and when the determination for all devices is completed, the process returns to the beginning.

FIG. 2(b) shows the operation of each transmitter, and is a flowchart of the storage procedure in the memory in each setting device. It is to judge.

If it is determined in step 150 that the process is not in an end state, it is determined in step 151 whether or not there has been an event request to the transmitter. If there is an event request here, the event contents are stored in the memory as shown in step 152, and in step 153 it is determined whether the memory is full.

If it is determined that the memory is full, a process is performed to set the memory full flag as shown in step 154. This flag is used to determine whether the memory is full in FIG. 2(a). .

In addition, in the case of multiple units, the situation will be as shown in Fig. 3.

[Effects of the Invention] As explained above, the present invention provides a memory in the interface device, stores the contents in the memory each time an event request is made to the transmitter, and when the number of times the event is stored exceeds a predetermined value, Since the data is transferred to the host CPU to predict the diagnosis timing, the host CPU no longer needs to frequently access the interface device, which prevents any negative impact on the process control equipment and prevents events from occurring. Since there is no need to store the contents in the host CPU each time, the memory capacity of the host CPU can be reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of FIG. 1, and FIG. 3 is a block diagram showing an example of a case where a plurality of devices are used. 1... Transmitter, 2... Receiving instrument, 4... Interface device, 5... L-rank computer, 6
...Portable setting device.

Claims (1)

[Claims] In a diagnostic device that monitors and manages the status of a transmitter based on data accessed to the transmitter by a portable setting device connected via a transmission path and data accessed to the transmitter by a host computer, an event request from the host CPU is used. a storage means for storing a history of event requests from the portable setting device; a notification means for notifying a higher-level computer of the fact when the number of times the history has been stored exceeds a predetermined value; and a higher-level computer that has received the notification; A diagnostic device comprising: judgment means for capturing data stored in a storage means, analyzing the data, and predicting maintenance timing.