JP3061189B2 - Die casting product production monitoring method and die casting product production monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a method and an apparatus for judging the quality of a product manufactured by a die casting machine by monitoring an operation state of the die casting machine. About.

(Prior Art) Die casting machines are widely used for manufacturing aluminum die casting products and other various die casting products.

The operation of the die casting machine includes so-called “test operation”, “discard operation”, and “normal operation”.

First, in trial operation, operating conditions for continuously manufacturing products are determined. The continuous operating conditions include, for example, in the case of a two-stage injection die casting machine, the speed of the plunger in the low speed section, the timing of switching the plunger from low speed to high speed, the timing of pressure increase (pressure increase) and the pressure thereof. And the like.

The next discarding operation is to operate the die casting machine to warm up the die casting machine at the time of starting or after stopping the die casting machine. The molten metal is introduced into the cavity of the die casting machine to bring the mold to a predetermined temperature state. An operation such as performing is performed.

When the discarding operation is completed, the continuous operation of the die casting machine is performed under normal operating conditions until the number of products to be manufactured reaches a predetermined number.

The operation of the above-described die casting machine is controlled by the die casting machine control device.

2. Description of the Related Art Conventionally, in a continuous operation for manufacturing a product, the operation state of the die casting machine for each injection of a product is output to a printer or the like by a die casting machine control device.

However, when the operation state of the die casting machine is output for each product, there is a problem that the print output becomes enormous.

In addition, since the print output is enormous, it takes a long time for an operator to determine whether or not the product manufacturing state is normal. is there.

Furthermore, in the operation of the die casting machine, the plunger speed, injection pressure, holding pressure, etc. change dynamically in a very short time, for example, several hundred milliseconds, and the complex transient response characteristics Therefore, there is a problem that it is difficult to perform appropriate dynamic alarm monitoring. In particular, there is a problem that it is impossible to realize such dynamic alarm monitoring at a high speed by a control device of an existing die-casting machine due to a limitation of processing capacity.

(Problems to be Solved by the Invention) The present invention is to solve the above-mentioned problem of wasteful output caused by indiscriminate output corresponding to the above-described product manufacturing.

Then, the present invention is to solve the above-mentioned problem that the alarm monitoring of the operation state of the die-casting machine showing complicated dynamic characteristics in a short time is not sufficient.

In view of the above, it is an object of the present invention to output an alarm state only when a product manufacturing state has reached a predetermined alarm operation state.

It is another object of the present invention to effectively perform appropriate monitoring corresponding to a high-speed and complicated operation of a die casting machine.

[Configuration of the invention]

(Means for Solving the Problems) A die casting machine control / monitoring system of the present invention will be described with reference to FIG. 2 and FIG.

According to the present invention, a die casting machine control device (90:91 to 97) for controlling an operation of a die casting machine (200);
A die casting machine control / monitoring system including a die casting machine product production monitoring device (50, 52, 54, 56, 11) for monitoring an operation state of the die casting machine is provided.

The die casting machine control device (90: 91 to 97) includes: an input / storage unit (95, 94, 91, 93) for inputting and storing an operation state of the die casting machine (200); and a predetermined control method. Control means (91, 93) for continuously controlling the operation of the die-casting machine, and in the continuous operation state of the die-casting machine, after the control result for one injection is finished for one injection, the die-casting machine product production monitoring device Signal transmission means for transmission (96 / 31,91,9
3) and

The die-casting machine product production monitoring device sets storage means (54, 56, 50, 52, 31) and a dynamic alarm operating condition of the die-casting machine (200) whose alarm operating condition changes with time. Alarm condition setting means (1: 11,50,52,54,56,31) to be stored in the storage means (54,56,50,52,31) and signal transmission means of the die casting machine control device Data input means (3: 50,52,54,31) for inputting the operation state of the die casting machine sent out, and the operation state of the die casting machine input from the data input means are set by the alarm condition setting means. Alarm determination means (5:50, 52, 54, 56) for determining whether the dynamic alarm operation condition is satisfied, and the dynamic alarm operation condition in which the operation state of the die casting machine is set. Alarm output means (7: 72,74,50,52,54,56) that outputs the alarm content when A.

Preferably, the data input means (3: 50,52,54,31) is provided with a designated signal so that the alarm determination means (5: 50,52,54,56) does not respond to an instantaneous alarm. , And the alarm determining means performs an alarm state determination on the result of the filtering.

Preferably, the alarm condition setting means (1:11, 50, 52, 5
4, 56, 31) are set so that the alarm state is determined when the alarm state continues for a predetermined time or occurs a predetermined number of times within the predetermined time, and the alarm determination means sets the state of the set die casting machine for a predetermined time. Alternatively, when the alarm is generated a predetermined number of times within a predetermined time, the state of the alarm is determined.

(Operation) The die casting machine control / monitoring system of the present invention is:
Provided with a die casting machine control device that controls the operation of the die casting machine and a die casting machine product manufacturing monitoring device that monitors the operation state of the die casting machine so that it can respond to the control operation and monitoring process of the very fast die casting machine. Thus, the system is configured to operate independently.

The die casting machine control device performs the control operation of the die casting machine irrespective of the presence or absence of an alarm state and the occurrence of many alarms. As described above, since the die casting machine control device does not perform the alarm process, the processing load is reduced, and the operation speed of the die casting machine can be quickly responded to, and in addition, the alarm state frequently occurs and the alarm output corresponds to the alarm output. Even when it takes time, the die casting machine control device continues to control the die casting machine irrespective of the alarm generation state. As a result, the die casting machine can continuously produce a die casting product for a predetermined operation time under the control of the die casting machine control device.

The die-casting machine product production monitoring device performs an alarm process by inputting a signal indicating the operating state of the die-casting machine detected by the die-casting machine control device by data input means. However, it does not output an alarm message in the dark cloud, but performs an easy-to-understand and effective alarm process according to the actual operation of the die casting machine. The first method is generally called “test run”, “discard run”, “continuous run” in a die casting machine.
Is performed, the alarm processing in "continuous operation" is performed. This “continuous operation” state is reported from the die casting machine control device. The second method performs dynamic alarm processing. That is, an alarm process is performed according to the operation state of the die casting machine. For example, in a die casting machine, the speed and pressure change in accordance with the steps of (a) hot water supply, (b) low-speed injection, (c) high-speed injection, and (d) pressure increase. The alarm processing is performed according to.

The operation of the die casting product production monitoring apparatus will be described with reference to the flowchart of the die casting product production monitoring method shown in FIG.

Prior to the normal continuous operation, the operator sets the alarm condition setting means (1: 11,50,52,54,
56, 31), a dynamic alarm operating condition of the die casting machine is set (step S01). Alarm condition setting means (1: 11,50,52,54,5)
6, 31) stores the alarm operating conditions set in the storage means (54, 56, 50, 52, 31).

In the continuous operation, the data input means (3:50, 52, 54, 60) of the die casting machine product production monitoring device inputs the operating state of the die casting machine from the die casting machine control device (step S02). This input is preferably performed for each product 1 injection (step S03).

The alarm determination means (5: 50,52,54,56) compares and determines the set dynamic alarm operation condition with the input operation state of the die casting machine and determines whether or not the alarm operation condition is met. It is determined (step S04). If the alarm operation condition is met, the alarm discriminating means (5: 50,52,54,56) activates the alarm output means (7: 72,74,50,52,54,56) to generate an alarm. The state is output (step S05).

Preferably, a process for determining the alarm state is performed when the alarm state continues for a predetermined time or occurs a predetermined number of times within the predetermined time. Also, when a die-casting machine is continuously operated in a short time cycle, the speed and pressure suddenly change and vibrate at high frequencies, so the signal is filtered so that such a steep change does not become an alarm. To eliminate the effects of vibration. Thus, unnecessary alarm output can be avoided.

As a result, an alarm is output only when the operation of the die casting machine matches the preset alarm operating condition of the die casting machine. On the other hand, in the case of a normal operation, the operation state of the die casting machine is not output except when there is a request from the operator, so that useless output can be prevented.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

First, a die casting product production monitoring device and a die casting machine control device as one embodiment of the present invention will be described with reference to FIG. In this embodiment, both the die-casting product production monitoring device and the die-casting machine control device are realized using a microcomputer system.

First, the configuration of the die-casting product production monitoring apparatus according to the embodiment of the present invention will be described with reference to FIG.

The alarm condition setting means 1 in the die casting product production monitoring device of FIG. 2 is realized by a keyboard (KB) 11, a central processor unit (CPU) 50, a ROM 52 and a RAM 54,
The alarm discriminating means 5 includes a CPU 50 and a read only memory (ROM).
52, a random access memory (RAM) 54, and a floppy disk drive (FDD) 56. The alarm output means 7 includes a display (DSP) 72, a printer (PRTR) 74, and a CPU.
50, ROM52 and RAM54. Further, the data input means 3 is realized by a CPU 50, a ROM 52, a RAM 54, and a shared memory 31 shared with a control device 90 of a die casting machine described later. The above-described components are connected via a bus 58.

The ROM 52 stores a later-described die-cast product manufacturing monitoring processing program, an alarm output program, a data input processing program, and the like. The CPU 50 performs a processing operation described later according to a corresponding program from the ROM 52. RA
M54 is used for temporary storage of data and programs.

The FDD 56 stores the operation state signal of the die casting machine input via the shared memory 31. The operation state signal of the die casting machine is also stored in the RAM 54. The RAM 54 stores data of one product injection, while the FDD 56 stores a large amount of data of the injection of a plurality of products.

On the other hand, the control device of the die casting machine is CPU91, KB92, RO
M93, RAM 94, process input / output device (PI / O) 95, and shared memory 96 which is the same as shared memory 31 described above.

The control device 90 of this die-casting machine is connected to the die-casting machine 200, and is connected to the die-casting machine 200 via PI / O95.
The reading of the pressure sensor 160, the reading of the speed sensor 140, the reading of the temperature sensor 150, and the state of the limit switch 170 at 0 are input. Further, a control signal (not shown) is output to the die casting machine 200 via the PI / O 95 to control the operation of the die casting machine 200.

In FIG. 3, the die-casting product production monitoring device of the present invention and the die-casting machine control device cooperate in a function-sharing manner. That is, the die-casting machine controller inputs various states of the die-casting machine via the PI / O 95 when controlling the die-casting machine through the PI / O95, and transmits various data on the injection of the product 1 to its own.
The information is stored in the RAM 94 and also in the shared memory 96 (or the shared memory 31). On the other hand, the die casting product production monitoring device inputs data from the shared memory 31 without directly detecting the state of the die casting machine. This data acquisition is preferably performed for each product 1 injection. In order to notify the end timing of this product 1 injection,
Preferably, a communication device 60 is provided on the die casting product production monitoring device side.
And a communication device 97 corresponding to the die casting machine control device side.

At the request of the operator, data of the normal state of the product can be output as in the past, but the output is output from the display 72,
This can be performed via a printer 74 or the like. In particular, FDD56
Since past data can also be stored in the memory, past normal data can be output as a log. As a result, it is not necessary to provide a large-scale storage device on the die casting machine control device side.
The burden of output is greatly reduced. By reducing the burden, the die-casting machine controller can monitor the dynamic operation of the die-casting machine for the die-casting machine to some extent. Details of this will be described later.

In addition, the alarm conditions set by the die-casting product production monitoring device are transferred to the die-casting machine control device, and the die-casting machine control device also performs certain types of alarm monitoring, for example, abnormalities that should stop the operation control of the die-casting machine. Status monitoring can be performed.

FIGS. 4 (a) to 4 (d) show an outline of a two-stage injection type cold chamber type die casting machine as an example of a die casting machine to which the die casting product production monitoring apparatus of the present invention is applied and its schematic operation form. Is shown. The basic normal operation mode of product 1 injection of this die casting machine is a hot water supply process (FIG. 4 (a)), a low speed injection process (FIG. 4 (b)), and a high speed injection process (FIG. 4 (c)). Pressure increasing and holding process (FIG. 4 (d)), mold opening process (not shown),
It includes an extruding step (not shown), a piston returning step (not shown), and the like.

Hereinafter, an outline of the normal operation of one injection for manufacturing a product will be described with reference to FIGS. 4 (a) to 4 (d) and an operation characteristic diagram of the die casting machine shown in FIG.

As shown in FIG. 4 (a), during the hot water supply process, a predetermined amount of the molten aluminum
2 and is introduced into a sleeve 108 between the plunger 104 and the cavity 106. In the figure, the hatched portions indicate the molten metal.

Next, as shown in FIG. 4 (b), the molten metal introduced into the sleeve 108 is pushed at a low speed by the plunger 104 in the low-speed injection process. The low-speed injection is performed at a predetermined critical speed so as to prevent the formation of a cavity due to entrainment of air. To drive the plunger 104, hydraulic pressure is applied to the injection cylinder 114, the injection piston rod 112 is pushed out of the injection cylinder 114, and the plunger 1 is connected via the plunger rod 110 connected to the injection piston rod 112.
This is performed by pressing the 04 into the sleeve 108. This low-speed injection operation is performed during a period shown from time t0 to time t2 in FIG.

The injection piston rod 112 is provided with magnetic scales 142 at predetermined intervals in the longitudinal direction. More specifically, a metal injection piston rod 112 is provided with a nonmagnetic groove at a predetermined pitch. The magnetic scale 142 is located at the tip of the injection cylinder 114.
, Ie, a movement of the injection piston rod 112, is provided with a magnetic sensor 144. The magnetic scale 142 and the magnetic sensor 144 constitute the above-described speed sensor 140 (in this case, a magnetic speed sensor). That is, when the magnetic scale 142 provided in the longitudinal direction of the injection piston rod 112 is hydraulically moved together with the movement of the injection piston rod 112, the movement is converted into a magnetic pulse as a velocity pulse represented by SPD (P) in FIG. It is detected by the tick sensor 144. The magnitude of the speed corresponds to the interval between detected pulses, in other words, the pulse frequency. Magnetic sensor
The speed pulse detected at 144 is once counted by a speed counter (not shown). Since the speed counter is updated at a predetermined cycle, the magnitude of the pulse counted at the predetermined cycle indicates the magnitude of the speed within a predetermined time. Then, the output of the speed counter is stored in the RAM 94 and the shared memory 96 via the CPU 91. The count speed indicated by this speed counter is shown as SPD (C) in FIG. On the other hand, a pressure sensor 160 for measuring the injection pressure is provided in the injection cylinder 114 of FIG. 4B, and in this embodiment, a strain gauge type pressure sensor is provided. This is shown as PR in the figure. The detected pressure value from this pressure sensor 160 is represented by P in FIG.
RAM 94 and shared memory via I / O 95 and CPU 91
Stored in 96. Similarly, a temperature sensor 150 for measuring the temperature of the mold around the cavity 106, the temperature of the molten metal 120, etc.
Input via PI / O95, RAM 94 and shared memory 96
Is stored. The on / off state of limit switches 170 provided at various points of the die casting machine 200 is also PI / O95
Through the RAM 94 and the shared memory 96.

Since this die-casting machine is a two-stage injection-type die-casting machine, at time t1 shown in FIG. 5, the process shifts from the low-speed injection to the high-speed injection process (step) shown in FIG. 4 (c). For this reason, high pressure oil pressure is applied to the injection cylinder 118 having a large diameter to move the injection piston rod 112 at high speed, and the molten metal is transferred through the plunger 104 to the sleeve 1.
08 is filled at a high speed, and the cavity 106 is filled through the gate at the entrance of the cavity 106.

The operating characteristics in this case are shown in the period from time t2 to time t4 in FIG. That is, the speed SPD (C) is rapidly increasing. Also, the pressure PR is gradually increasing. When the plunger 104 is sufficiently pushed into the sleeve 108, the plunger 104 stops, so that the speed SPD (C) becomes almost zero.
(Zero).

After the time t4, the plunger 104 is added to the molten metal in the cavity 106.
The pressure is increased after a predetermined time T1 elapses, for example, T1 = 30 ms, and is maintained for a predetermined time T2 between times t5 and t6, for example, T2 = 165 ms.

 Thereafter, processing after the mold opening (not shown) is performed.

The above is the outline of the operation of one injection in the continuous product manufacturing operation, and the control is performed by the die casting machine control device.

Next, the processing contents of the die casting product production monitoring apparatus of the present invention shown in FIG. 3 which operates according to the control of this die casting machine control apparatus will be described with reference to the operation flowchart shown in FIG.

First, as described above, prior to continuous operation, the alarm operating conditions of the die casting machine are set via KB11,
The value is stored in the RAM 54.

The alarm operation conditions to be set include, for example, the following.

(I) Low speed value (ii) High speed start position (iii) High speed (iv) High speed section (v) Peak speed (vi) Casting pressure (vii) Biscuit thickness (viii) Cycle time (ix) Plunger injection Pressure (x) Injection position of plunger (xi) Injection speed of plunger These alarm operating conditions are related to the operating characteristics of the die-casting machine as shown in Fig. 5, that is, time factors are considered. Is set. These alarm operating conditions are also stored in the FDD 56 and the shared memory 31 as needed. The data is stored in the FDD 56 for the purpose of outputting the backup and alarm operating conditions when the die casting product manufacturing apparatus goes down. The reason why the alarm operation condition is stored in the shared memory 31 is to enable the die casting machine control device to use the alarm operation condition.

When the continuous operation starts, the following processing is performed. The determination of the mode switching from the discarding operation to the continuous operation and the determination of the end of the injection of the product 1 are made on the die casting machine control device side.
Is notified to the CPU 50 via.

When the CPU 50 of the die casting product production monitoring device is notified via the communication device 60 that it has entered the continuous operation mode, it enters a standby state.

Next, when the end of the injection of the product 1 is notified from the die casting machine control device (step S12 in FIG. 6), the CPU 50 of the die casting product production monitoring device indicates the operation state of the die casting machine stored in the shared memory 31. Various data are transferred from the shared memory 31 to the RAM 54 (step S13), and further stored in the FDD 56.

Various operation state signals of the die casting machine input by the die casting machine control device are input at a cycle corresponding to a sampling cycle required for control. The cycle is, for example, 1 ms. Therefore, data transferred from the shared memory 31 is data for each cycle. That is,
It is a time series signal. Also, limit switch 170
Such signals may be input by interruption.
In this case, the interrupt time is stored. Therefore, the data from the shared memory 31 is time-based data.

Since the die-casting machine control device does not need to print out each time a product is ejected as in the related art, the shared memory 96 (shared memory 31) to the RAM 54
When the data transfer to the end product is completed, the control processing of the die casting machine for the next product becomes possible. The completion of the transfer is notified from the die casting product production monitoring device side to the die casting machine control device via the communication device 60 and the communication device 97.

Returning to the description of the processing operation of the die-cast product manufacturing monitoring device, the CPU 50 determines the operation result of the die-casting machine for the injection of the die-cast product 1 transferred to the RAM 54 in sequence with the alarm operation conditions set as described above and stored in the RAM 54. Comparison is performed (step S14).

Here, when comparing the alarm operating condition and the operating state of the die casting machine, predetermined signal processing, for example,
Filter the signal. This is because, as shown in Fig. 5, the operating characteristics of the die-casting machine, the pressure and the speed change considerably, and the raw signal changes instantaneously.
This is to prevent a frequent alarm from being generated if the vibrational changes are compared as they are. Also, the judgment is made with a certain margin for the alarm set value. That is, signal processing and determination processing that can output an alarm that can be determined by the operator to be appropriate are performed.

When any alarm condition is detected, an alarm is output (step S15). As for the alarm output, an alarm state is output to the display 72 and the printer 74 under the control of the CPU 50.

 The following is an example of alarm output.

First, examples of data set values are shown in FIGS. 7 (a) to 7 (d). This output is output to the printer 74 in principle.
Can also be displayed.

FIG. 7 (a) relates to “mold setting data (left side)” and “injection data 1 (right side)”, and “ON” or “OFF” indicates that an alarm is output for the injection data, respectively. Indicates that no alarm is output.

FIG. 7B shows various data of "injection data 2 (left side)" and "setting of correction method (right side)". The discrimination between the alarm and the normal is the same as in FIG. 7 (a).

FIG. 7 (c) shows the data of "clamping data (left)" and "die-casting machine parameters (right)".

FIG. 7D shows the state of the “injection limit switch”.

Next, FIG. 8 shows measurement data of the operation state of the die casting machine. This data is digitally displayed on the display 72.

Further, FIG. 9 shows a graph of a die casting machine corresponding to FIG. 5 and dynamic characteristics. This content is displayed on display 72.
Will be displayed. In this figure, curve P is pressure, curve V
Represents the injection speed of the plunger, and curve L represents the position of the plunger. In addition to these, there are curves indicating the temperature of the mold, etc., but these are omitted for the sake of illustration. This graph shows the dynamic characteristics of high-speed injection, pressure increase, and holding pressure. The display contents can be hard copied to the printer 74 at the request of the operator.

In addition, various outputs can be performed depending on the alarm status.

As described above, from the die-casting product production monitoring device, in principle, corresponding alarm information is output only when an alarm is found, so that output waste can be prevented.

The alarm monitoring is performed according to the dynamic operating characteristics of the die casting machine as described above.

It should be noted that monitoring for an abnormality such that the operation of the die casting machine cannot be continued can be directly performed on the die casting machine control device side. This alarm condition can be set by the die casting product production monitoring device side, stored in the FDD 56 and the shared memory 31, and transferred to the die casting control device side via the shared memory 31.

For example, if the amount of output to the printer 74 is large and the next product 1 injection is completed before the output processing on the die-casting product production monitoring device side is completed, the above output will be FDD 56
Is performed for data in a certain area, so that data transfer from the shared memory 31 to the RAM 54 and the FDD 56 for new data is performed without any problem. Therefore, the output does not hinder the control of the die casting machine.

It is to be noted that the same data output as in the related art can be performed on the display 72 or the printer 74 when requested by the operator.

As described above, the control and monitoring of the entire die-casting machine is improved by providing the die-casting machine control device and the die-casting product production monitoring device of the present invention in parallel and sharing the functions.

The product production monitoring of the two-stage injection type cold chamber type die casting machine has been described above. However, the die casting product production monitoring method and the die casting product production monitoring device of the present invention are not limited to other die casting machines, for example, hot chambers for Zn alloy. The same applies to a die-casting machine.

Further, in practicing the present invention, it is needless to say that the configuration is not limited to the configuration illustrated in FIG. 3 and various other device configurations that perform the above-described processing functions can be adopted.

Further, the die casting machine control device 90 shown in FIG.
It can be realized by a microcomputer device.

〔The invention's effect〕

As described above, according to the present invention, there is an effect that an alarm state can be output only when a product manufacturing state is in a predetermined alarm operation state.

Further, according to the present invention, there is an effect that it is possible to effectively perform appropriate monitoring corresponding to a die casting machine that performs a complicated operation at high speed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of a method for monitoring the production of a die-cast product according to the present invention, FIG. 2 is a block diagram showing the principle of a device for monitoring the production of a die-cast product according to the present invention, and FIG. FIG. 4 (a) to FIG. 4 (d) show relevant parts and main parts of a die casting machine as an example to which the die casting product production monitoring method of the present invention and the die casting product production monitoring device of the present invention are applied. FIG. 5 is a diagram showing dynamic characteristic curves of the die casting machine in FIGS. 4 (a) to 4 (d), and FIG. FIGS. 7 (a) to 7 (d), 8 and 9 are diagrams each showing an alarm output as an embodiment of the present invention. (Explanation of symbols) 1 ... alarm condition setting means, 3 ... data input means, 5 ... alarm discriminating means, 7 ... alarm output means

Claims (3)

(57) [Claims] 1. A die casting machine control / monitoring system comprising: a die casting machine control device for controlling the operation of a die casting machine; and a die casting machine product production monitoring device for monitoring an operation state of the die casting machine. An input / storage unit that inputs and stores an operation state of the die casting machine; a control unit that continuously controls the operation of the die casting machine based on a predetermined control method; and a continuous operation state of the die casting machine. A transmission means for transmitting a control result during one injection to the die-casting machine product production monitoring device after one injection is completed, wherein the die-casting machine product production monitoring device comprises: a storage unit; The dynamic operating conditions of the die-casting machine whose operating conditions change Alarm condition setting means to be stored in a storage means; data input means for inputting the operation state of the die casting machine sent from the transmission means of the die casting machine control device; and operation state of the die casting machine input from the data input means Alarm determining means for determining whether or not the dynamic alarm operating condition set by the alarm condition setting means, and the operating state of the die casting machine corresponds to the set dynamic alarm operating condition. And a warning output means for outputting a warning content when the vehicle is running. 2. The data input means performs a filtering process on a designated signal so that the alarm determination means does not respond to an instantaneous alarm. The alarm determination means performs an alarm state determination on the result of the filtering process. The control / monitoring system according to claim 1. 3. The alarm condition setting means is configured to perform an alarm state determination when an alarm state continues for a predetermined time or occurs a predetermined number of times within a predetermined time so that the alarm determination means does not respond to an instantaneous alarm. The die-casting machine control / monitoring system according to claim 1 or 2, wherein the alarm judging means performs the alarming state judging when the set state of the die casting machine continues for a predetermined time or occurs a predetermined number of times within a predetermined time.