JPH03273306A - Inspection instrument for driving controller - Google Patents

Abstract

PURPOSE:To surely detect the abnormality of driving parts by storing upper and lower limit current values of each driving part when a prescribed time is over from the operation start time in the state that driving parts are normally operated. CONSTITUTION:A driving signal is supplied to an AC driving circuit 3 or a DC driving circuit 5 so that power is supplied to either of devices of driving parts I and II from an AC power source part 4 or a DC power source part 6. Allowable upper limit and lower limit currents of the device (motor M1) which starts the operation and the detection time are read out from a RAM 9. The current supplied to the motor M1 at the time of the detection time after the driving start of the motor M1 is calculated based on the detection signal from a current detector 7. It is judged by a CPU 1 whether the calculated current is in the range between allowable upper and lower limits or not. If the calculated current is not there, the abnormality of the motor M1 is displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field)
The present invention relates to an inspection device for a drive control device that inspects abnormalities in a drive section in a drive control device for a drive section such as a pieflator and a motor.

[Conventional technology]

Conventionally, drive control devices have been provided with rotary solenoids for each of a plurality of hopper gate opening/closing devices to open and close the hopper gates, for example, and a drive circuit provided between these solenoids and a power source. There is. Then, the drive circuit supplies power from the power source to the solenoid corresponding to the drive signal supplied to the drive circuit. In such a drive control device, the following devices are used to check whether the solenoid is operating normally.

That is, a detector such as a limit switch or an optical detector is provided at the open position of the gate of each hopper, and the detector is configured to generate an output when the gate reaches the open position of the gate. For example, if a solenoid corresponding to a gate is energized to drive the gate to the open position, but this gate is not driven to the open position, the detector corresponding to this gate or the output will be activated. This does not occur, and based on this, for example, an alarm is activated.

[Invention or problem to be solved]

However, with such conventional inspection equipment, it is necessary to provide a detector such as a limit switch (or optical detector) for each drive section.As the number of drive sections increases, the number of detectors also increases. Comes with much needed. Furthermore, as the number of detectors increases, the possibility of detector failure also increases, and if one of the detectors fails, there is a problem that an abnormality in the driving part may not be discovered. Also, this is simply solenoid force)
There is also the problem that it can only detect whether or not it is working, and it is not possible to determine whether or not it is working normally.

According to the present invention, even if the number of drive parts increases, the cost does not increase accordingly, and the possibility of failure of the inspection device does not increase accordingly, and therefore, it is possible to reliably detect abnormalities in the drive parts. An object of the present invention is to provide an inspection device for a drive control device.

[Means to solve the problem]

This invention was made in view of the above problems,
A first invention includes a power supply section for a plurality of drive sections, and a power supply section that supplies driving power to the drive section that is interposed between each of the drive sections and the power supply section and corresponds to the input drive signal. A drive control device comprising: a current detection unit that detects a current supplied from the power supply unit to the drive circuit; a storage unit that stores the allowable upper limit and lower limit current for each drive unit after a predetermined period of time has elapsed from the start of operation; a current calculation unit that calculates the current supplied to the object after the predetermined period of time has elapsed from the start of driving, and a range of allowable upper and lower limit currents listed in E for which the calculated current is stored in the storage unit. The present invention is characterized by comprising a determination unit that generates an output signal when the device is outside the vehicle.

A second invention is a test device for a drive control device as described above, in which the allowable upper limit and lower limit current are measured at a plurality of measurement points when the storage section L or each drive section is operating normally. The present invention is characterized in that it is stored for each of the drive units and calculates the current to be supplied to the E current calculation unit or to the drive unit that has started to be driven at each of the measurement times.

[Effect]

In the first invention, the permissible current limit and the permissible lower limit current when a predetermined period of time has elapsed from the start of operation in a state in which each drive part is operating normally are stored in a storage unit for each drive part. Something comes up. When a drive signal is input to the drive circuit, the drive circuit or the drive section corresponding to the drive signal can be driven by supplying drive power from the power supply section. When the drive unit is driven, the current supplied from the power supply unit to the drive unit is calculated based on a detection signal from the current calculation unit or the current detection unit when a predetermined period of time has elapsed from the start of the drive. Then, when this calculated current is outside the range of the allowable upper limit current and allowable lower limit current that are stored in advance in the storage unit, 1 the determination unit generates an output signal and 2, for example, outputs the output signal to the drive unit. Alerts you that there is an abnormality,
It is possible to stop the drive section.

In the second invention, the allowable upper and lower limit currents are recorded for each drive unit at a plurality of measurement points while each drive unit is operating normally. It can be stored in the section. When a drive signal is input to the drive circuit, the drive circuit or the drive section corresponding to the drive signal is supplied with drive power from the power supply section to drive the drive circuit or the drive section corresponding to the drive signal. Drive unit or drive,
When the drive unit is operated, the current supplied from the power supply unit to the drive unit at each measurement time is sequentially calculated based on the detection signal from the current calculation unit or the current detection unit. Then, when this calculated current is outside the range of the allowable upper limit current and allowable lower limit current that are stored in advance in the storage unit, the determination unit generates an output signal and, for example, there is an abnormality in the drive unit. It is possible to warn of the presence of a problem or to stop the drive unit.

(Embodiment) A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. The inspection device of this embodiment is provided in a drive control device as shown in FIG. The drive control 1 device transmits a drive signal to the AC drive circuit 3 according to the program stored in the microcomputer's CPLI or PROM 2, and connects the AC drive circuit 3 to this drive circuit 3 based on the drive signal. Drive part work (motor M1
M2. Driving power is supplied from the AC power supply unit 4 to either the high inflator (1) or (2). And, the drive unit ■ (solenoid valves (1), (2), Nrenoite) is as follows.
Like the drive unit I, it is connected to the CPU 1 via the DC drive circuit 5, and the drive power is supplied to any device in the drive unit H from the DC R power supply unit 6 via the DC drive circuit 5. .

The inspection device includes a current detection section 7.8, a storage section 9. It includes a current calculation section and a determination section. The current detection units 7.8 are interposed between the AC power supply unit 4 and the AC drive circuit 3, and between the DC power supply unit 6 and the DC drive circuit 5, and are arranged between the AC power supply unit 4.6 and the DC drive circuit 5. It is possible to detect the current supplied to the drive circuit 3.5. Each current detection section 7.
The detection signals generated by 8 are sent to A/D converters 1011
1 to CPU l.

The storage unit 9 is a RAM (hereinafter referred to as RAM) connected to the CPUI.
The storage unit 9 is called RAM9. ), and each drive unit 1. I
When the devices included in I are operating normally, the permissible and lower limit currents for the current flowing through these devices after a predetermined period of time from the start of operation are determined for each drive unit I, H.
stored for each device. These data are
By operating the setting manual unit 12 connected to the input device 1, the input data 1 is stored as shown in FIG. 3, for example.

The current calculation section is achieved by the operation of <cpui based on the flash memory stored in the PROM 2, and each drive section 1. The current supplied from the AC or DC power supply unit 4.6 to the device U that has started to be driven is calculated when a predetermined time has elapsed from the start of driving. For example, when the motor M is operating normally and the current I is being supplied from the AC power supply unit 4 to the AC drive circuit 3, the AC power supply If the current supplied from section 4 to AC drive circuit 3 is I2, then the current supplied to motor M2 is I2-I.

The current calculating section performs such calculations in the current detecting section 7.
．． This is done based on the detection signal from 8.

The determination section is achieved by operating the CPUI based on the program stored in the PROM2.

``Is it the current that was calculated by the 111H in the IT flow calculation section?
The output signal is lt I& when it is outside the range of the allowable limit and F@current stored in the RAM 9. for example,
If the calculated current is the current of motor M2, motor M2
The allowable upper limit and lower limit current of motor M2 are read from RAM9, and the allowable upper limit and lower limit TtfiL of the current of motor M2 are read out.
, and if it is outside the range defined by the allowable north limit and lower @current, an output value S is generated.

Based on this output signal, the device with the abnormality can be displayed on the display unit 13 connected to the CPUI to notify the user, and at the same time, the AC and 11f diversion drive can be used to stop the device with the abnormality. It is also possible to command circuit 3.5.

Next, a flowchart of the CPUI will be explained with reference to FIG. First, operate the setting manual section 12 to set each drive section ■
, H, the allowable upper and lower limit currents and their predetermined times when a predetermined time has elapsed from the start of operation when each device is operating normally are stored in the RAM for each drive part machine and the device (■).
9 (step 100). For example, as shown in the third [m], the motor M1 has a predetermined time (hereinafter referred to as detection time), L1 permissible upper limit current a, permissible lower limit current b
It is l. Next, whether this drive control device shown in FIG.
When drive control of the drive unit and H is started based on the program in the ROMZ or a signal supplied from the outside to the CPU i (step l old), it is determined whether there is any device among the drive unit or H that should be driven. (Step 102)
, if there is a device to be driven (if YES), drive unit I
, H. A drive signal is supplied to the AC drive circuit 3 or the DC drive circuit 5 so that the AC power supply unit 4 or the DC power supply unit 6 supplies power to any of the devices (step 1).
03).

If the answer to step 102 is No, the process returns to step +01. Then, the allowable upper and lower limit currents and detection time of the device that has started operating are read out (step 104). For example, if the device or motor M is activated, its allowable upper and lower limit currents a1, b, and detection time L1 are read from the RAM 9. Next, the detection flag is turned ON and the detection timing timer T1 is set to have the read detection time, for example, 1. (Step 106) 6 Then, step +
Return to 01 and repeat the -1- block diagram.

Here, 1. For example, in order to issue a command that causes the current calculation unit to calculate the current supplied to the motor M, when the detection time t1 has elapsed after the motor M starts operating, the IRQ (interrupt routine) is activated for a certain period of time. Execute every time. That is, step 1
08, determine whether the detection flag is ON, and if YES,
The time t of the detection timing timer T1 is time 1. If the answer is YES, the current X supplied to the motor M1 when the detection time t has elapsed from the start of driving the motor M1 is calculated based on the detection signal from the current detection unit 7. (step 112). For example, the detection signal from the current detection section 7 before the motor M is activated is subtracted from the detection signal from the current detection section 7 after the detection time has elapsed. This step 112 is a current calculation section. Then, the detection flag is turned OFF (step 114).
), the calculated electric current flLx corresponds to the allowable upper limit and lower limit current a1. Step 116) If the calculated electric current iX is not within this range, the power supply to the motor M is stopped [and the display unit 13
The driver and the like are notified by displaying a message that motor M1 is abnormal (step 118). step +16
This corresponds to the judgment section.

However, if Steps 108 and 110 are No,
Terminate this interrupt routine. And Ste Nbu 1
If +6 is YES, it is determined that the motor M1 is operating normally, and the stepper 102 is operated by another drive unit (another device of the drive units I and H). Perform the same rectangle as described in L each time it operates.

Next, a second embodiment will be explained. Since the block diagram of the second embodiment is the same as that of the first embodiment, it will be explained using the first L/l. However, in the second embodiment, each drive part work,
The allowable upper and lower limit currents for each drive unit I at multiple measurement points when each device in H is operating normally.
, H is stored in the RAM 9 for each device, and the current calculation unit calculates the current supplied to the drive unit I and H that has been started during each measurement, and the determination unit or When this calculated current is outside the range of the allowable upper limit and lower limit current stored in the RAM 9, the output signal is activated.

A flowchart of the CPUI will be described with reference to FIGS. 4 and 5. First, by operating the setting input section 12, the allowable upper and lower limit currents and their predetermined times at multiple measurement points when the devices of each drive section I and H are operating normally are inputted to each drive section (1), For example, as shown in FIG.
++L2,...,t,. , permissible upper limit current or all
, 3M2 , ...a, 0, allowable lower limit current or bll
l+L2,...,b. It is. Next, the program or CP in the drive control device or PROM2 shown in FIG.
Drive unit I, based on a signal supplied externally to U1;
When the drive control of H is started (step 201), the drive section engineer judges whether there is any equipment to be driven among the equipment in (2) (step 202).
S), each drive unit 1. In order to supply power from the AC power supply section 4 or the DC power supply section 6 to any of the devices in (2),
A drive signal is supplied to the AC drive circuit 3 or the DC drive circuit 5 (step 203). Assuming that the device that has started operating is, for example, a solenoid valve (1), its allowable upper limit current a,..., allowable lower limit current S,..., and detection time t1... are stored in RAM9. Read (Step 2)
04), turns on the detection flutter and sets the detection timing timer T1 to the detection time Ll corresponding to the solenoid valve (1) (step 206). Then, the process returns to step 201 and repeats the above program.

Here, the command that causes the current calculation unit to calculate the current supplied to a newly activated device, for example, the solenoid valve (1) among the devices of drive units (within a routine). That is, it is determined in step 208 whether the detection flag is ON, and if YES, the time t of the detection timing timer T, for example, the time t.
Stereo knob 210 to determine if the time has reached 1.
), if YES, the electric power supplied to the solenoid valve (1) when time Ll has elapsed from the start of driving the solenoid valve (1)? Q y
+ is calculated based on the detected value from the current detection unit 8 (step 212). This can be done, for example, by subtracting the detection signal of the current detection section 8 before the operation of the electromagnetic valve (1) from the detection signal of the current detection section 8 after the elapse of time t11. Then, it is determined whether the calculated electric current fRy + is within the corresponding allowable upper limit and the molding flow a□, l) ml.
If it is within this range (step 214 or YES), this interrupt routine ends and the process returns to step 20.
Starting from 8. At this point, the time t or tl of timer T1 has passed (step 210 or No).
Proceeding to step 218, the time t or t of timer T1 is determined.
If YES, the current y2 supplied to the solenoid valve (1) is detected when time -2 elapses from the start of the solenoid valve (1). Part 8
Detection from (calculated based on No. 1 (step 220
). It is determined whether the calculated current y2 is within the corresponding allowable upper and lower limit currents a*2 and b1 (step 222), and if the output electric current tky2 is within this range, Starting again from step 208,
Repeat the same process as above. Finally, the time t of timer T or E.

When the current y is reached and steps 224 and 226 are processed, the detection flag is turned off (step 228) and the calculated current y becomes the corresponding allowable upper and lower limit currents a+++n, I)s+. In step 230), it is determined whether iE is within the output current y. If it is within this range, it is determined that the solenoid valve (1) is operating normally, and in step 202, another drive unit 1. The same process as above is performed every time the device in [I] is activated.

However, if the answer to step 2011 or step 224 is No, this interrupt routine ends -Fj- or is repeated every predetermined time period.

Then, steps 214, 222,..., 230
Either step Ry1. If yt... is not within the allowable upper limit and limit current range, the solenoid valve (1
), and displays on the front panel 13 that the solenoid valve (1) is abnormal, thereby informing the driver, etc. (step 216). For example: ffEJ7
[After energizing the flL magnetic valve (1) as shown in A,
If the supply ``#'' and the flow value y2 at the time of the lapse of the 12 special period are larger than the permissible limit tonnel flow am2, the determination is No in step 222, and the process proceeds to step 216, where the energization to the solenoid valve (1) is stopped. Take measures such as having the person

In addition, 1. In the second embodiment, the drive part engineer.

Have you inspected the load current when the H devices are operated one by one, or compared the load current when the two devices at point E are operated at the same time with the allowable upper limit and D limit current to find out if there is an abnormality in those devices. You can also test whether or not. In other words, the 2nd F
If the equipment starts 1 operation at step +04 of '71(a) or 2 hours or more]-, the allowable upper limit current value is the sum of the allowable -L molding flow values read out, and Adding the allowable F forming flow value is the allowable 'FIl
[l is the current value.

In addition, in step 204 of FIG. 4(a), the respective tolerances for the predetermined inspection time for reading 1 are determined. 4
The tolerable upper limit current value is calculated for each detection time by using the sum of ti as the allowable upper limit current value for the predetermined inspection time. Similarly, the allowable lower limit current value is also calculated. Then, the calculated allowable upper limit and lower limit current values are compared with the load current at each predetermined detection time or predetermined inspection time for inspection. However, if the load current of two or more devices operating simultaneously is outside the range of the total allowable upper and lower limit currents, it is not possible to determine which of those devices has an abnormality. or at least the devices activated at the same time.

In the first and second embodiments, the respective drive parts,
Set the allowable upper and lower limit currents at a predetermined time when the equipment in H is operating normally. Operate input section I2 to set R.
The normal current value stored in the AM9 or at a predetermined point in time is input to the CPLI l by operating the setting input section 12, and
The PU 1 can calculate the allowable upper and lower limit currents by multiplying this normal current value by a predetermined coefficient and store them in the RAM 9 .

In addition, as shown in FIG. 5, the allowable upper limit and lower limit currents of each drive unit I and II at multiple measurement points when the devices of each drive unit I and II are operating normally are stored in the RAM 9 of the second embodiment.
, H, or by storing the data shown in FIGS. 3 and 5 as shown in FIG. It is also possible to carry out inspections in order based on the flowchart in FIG.

Furthermore, the first. In the second embodiment, when the current calculated by the current calculation unit is not within the allowable upper and lower limit current ranges,
The driver etc. was notified by stopping the power supply to the drive unit and displaying on the display unit 13 that the drive unit is abnormal. It is also possible to display this and continue operating the drive unit.

By interposing A/D converters 10 and II between the current detecting section 7.8 and the CPUI, or by providing the current detecting section 7 with a digital signal generation function, this inspection device It is possible to delete the A/D converters 10 and 1+ from.

〔Effect of the invention〕

The first invention is configured as described above, and is capable of notifying a serious abnormality in which either the driving part or the driven part cannot be driven even if one driving part is energized, and also being able to notify the driven part. Even when the drive unit is driven, if the load current of the drive unit after a predetermined period of time has elapsed from the start of driving is not within the range of the predetermined allowable upper and lower limit currents under normal driving conditions,
For example, when the driving section drives the driven section with an abnormal overload or light load, the abnormality can be notified. In addition, since one current detection unit can be provided for one power supply unit, even if the number of drive units increases, the cost of the current detection units, etc. does not increase accordingly. Since the number of current detection units is smaller than the number of current detection units, there is an effect that the possibility of failure is lower than that of conventional inspection equipment.

According to the second invention, in addition to the effect of the first invention, when the driving part is driven, the current supplied from the power supply part to the driving part at a plurality of measurement points from the time when the driving started, This has the effect that if the drive unit is outside the allowable upper and lower limit current ranges at a plurality of measurement points when the drive unit is operating normally, it is possible to issue an alarm for an abnormality in the drive unit. In other words, for example, when the solenoid described in the conventional example drives a gate opening/closing device, the current calculated at the time of measurement may not be working normally due to the opening/closing device getting wet and not moving. If the current is outside the range of the allowable upper and lower limits when the current is present, an alarm can be issued to indicate an abnormality in the drive unit.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the first and second embodiments of the drive control device according to the present invention, and FIGS. 2(a) and 2(b) are flow charts showing the program of the microcomputer used in the first embodiment. Figure 3 is a diagram showing the contents stored in the RAM of the first embodiment, Figures 4 (a) and (b) are flowcharts showing the program of the microcomputer used in the second embodiment, and Figure W45 is a diagram showing the contents stored in the RAM of the first embodiment. A diagram showing the contents stored in the RAM of the example, FIG. 6 is a diagram showing another embodiment of the contents stored in the RAM, and FIG. 7 is a diagram showing the allowable upper limit and limit current of the second embodiment and the current calculation section It is a figure which shows the relationship with the electric current value calculated by. 1... Microcomputer (CPU), 2...
・PROM, 3... AC drive circuit, 4... AC power supply section, 5... DC drive circuit, 6... DC power supply section, 7.8... Current detection Device, 9...RAM
(Memory part). 'rt figure

Claims (2)

[Claims] (1) A power supply unit for a plurality of drive units, and a drive circuit that is interposed between each of the drive units and the power supply unit and supplies drive power from the power supply unit to the drive unit corresponding to the input drive signal. A drive control device comprising: a current detection unit that detects the current supplied from the power supply unit to the drive circuit; and a predetermined time period after the start of operation when each of the drive units is operating normally. a memory unit that stores the allowable upper and lower limit currents for each of the drive units; and a memory unit that stores the allowable upper and lower limit currents for each of the drive units, and a memory unit that stores the allowable upper and lower limit currents for each of the drive units, and a memory unit that stores the allowable upper and lower limit currents for each of the drive units for the predetermined period from the time of start of drive, based on the detection signal from the current detection unit. a current calculation unit that calculates the current supplied during elapsed time; and a current calculation unit that generates an output signal when the calculated current is outside the range of the allowable upper and lower limit currents correspondingly stored in the storage unit. 1. An inspection device for a drive control device, comprising: a determination section. (2) In the inspection device for a drive control device according to claim (1), the storage unit or each of the drive units is configured to store the allowable upper limit and lower limit current at a plurality of measurement points when each drive unit is operating normally. An inspection device for a drive control device, characterized in that the current is stored for each of the drive units, and calculates the current to be supplied to the current calculation unit or the one of the drive units whose drive has started at each measurement time point. .