JP2633642B2 - Power control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] A power control device for a system including a plurality of units controlled by a main control device, wherein the main control device and various units are easily and appropriately operated by one-touch operation of a power switch of the main control device. The main control unit is provided with a power-on / off controller for sequentially transmitting a power-on / off signal for self-control and external control in response to a power-on / off operation of a power switch. A power supply control adapter equipped with a power supply sequence that controls the supply and cutoff of commercial AC power to various units is provided externally, and when a power-on or power-off instruction signal is received from the main controller, the power supply control adapter supplies power to the various units. On the other hand, the power supply and the power supply are sequentially performed.

The present invention relates to a power supply control device for a system including a plurality of units controlled by a main control device.

When introducing general units such as printers, modems, optical disks, and faxes into the system, the power supply sequence is not established between these units and the main controller that controls these units. Need to be controlled.

However, power control of various units separately from the main control unit requires complicated power-on and power-down operations, which hinders save processing during power outages. It is hoped that it can be done.

[Prior Art] Conventionally, when a main control device is composed of a plurality of units, a power supply control method in which a power supply sequence is performed between the plurality of main control devices and power on and power off are performed collectively. Has been adopted.

FIG. 4 is a configuration diagram of a conventional device when an extended control device is added to the main control device.

In FIG. 4, reference numeral 10 denotes a main controller, which is a main controller.
10 includes a power switch 14, a power on / off control unit 22,
24, and an independent power supply 28 for the extended controller 26.
Is provided.

As shown in the time chart of FIG. 5, when the power switch 14 of the main controller 10 is turned on, the power on / off controller 22 first turns on the main controller 10.
The power-on command signal S1 is output to the power supply 24 inside the power supply 24, and a power supply DC output is obtained from the power supply 24.

Subsequently, the power on / off control unit 22 controls the power of the extended control device 26.
28, the power-on instruction signal S2
In response, a power supply DC output is obtained from the power supply 28.

On the other hand, also when the power is turned off, the turning-on operation of the power switch 14 causes the turn-on instruction signals S1 and S2 to be sequentially turned off, and the main controller 10
Then, the power supply is cut off in the order of the extension control device 26.

On the other hand, the following power control is performed for general units such as a printer, a modem, an optical disk, and a FAX which do not have a power sequence with the main control unit.

First, as a method of turning on the power of the main control unit and various units at once, connect the various units to the power distribution panel that is powered by the main control unit, and then turn on the main power lever of the distribution panel to perform main control. Supply commercial AC power to the equipment and various units at once. Of course, in the case of turning off the power, the main power lever of the distribution board is also turned off.

[Problems to be Solved by the Invention] However, when the power supply of the main control device and various units is controlled by such a conventional operation of turning on and off the distribution board, there is the following problem.

First, since the power supplies of all the devices are turned on at the same time, a distribution board having a large rush current resistance is required, and the cost is increased. At the same time, since the current load is large, a main power contactor having a large current capacity is required to prevent burning of the switch contact at the time of disconnection, and the cost increases accordingly.

In addition, when the number of units installed increases, it is necessary to divide the system into a plurality of distribution boards. In this case, there is a case where instantaneous interruption or power failure occurs only with a specific distribution board, and system management cannot be performed. Therefore, a power failure of a specific unit may cause an abnormality such as a system down.

For example, if the power of the main controller and the power of the optical disk are taken from different distribution boards, even if a power failure occurs on the optical disk side, the power failure cannot be detected on the main controller side. If a write operation has been performed, the guarantee of sector writing cannot be obtained, and if an access is made from the main controller and a sector read is performed thereafter, an error will occur and the system will go down. Problem.

Of course, a method of individually controlling the power switch provided for each unit is also conceivable. However, it is not practical because the on / off operation is complicated, and there is a problem that it cannot cope with an instantaneous interruption or power failure.

The present invention has been made in view of such conventional problems, and provides a power supply control device capable of easily and appropriately controlling a main power supply and various units by a one-touch operation of a power supply switch provided in a main control unit. The purpose is to do.

[Means for Solving the Problems] FIG. 1 is an explanatory view of the principle of the present invention.

In FIG. 1, first, the present invention is directed to a power supply control device of a system including a plurality of units 12-1 to 12-n controlled by a main control device 10.

In the present invention, such a power supply control device is provided in the main control device (10), and is provided with a turn-on instruction signal for self-control and an external control in response to a turn-on operation or a turn-off operation of the power switch (14). A power-on / off control unit (16) for sequentially transmitting a power-off / instruction signal; and a unit (12-1 to 12-n) upon receiving a power-on / off signal from the power-on / off control unit (16). A power supply control adapter (18) is provided for sequentially supplying commercial AC power or interrupting the supply of commercial AC power. The power control adapter (18) detects a power failure of the commercial AC power supply when the power is turned on. A power failure detection unit (20) for transmitting a power failure detection signal for notifying the main control device (10) of the power failure detection, and transmitting the power failure detection signal to the first transmission line as a first power failure signal. Or second
And a selection circuit (42, 44, 46) for selecting whether to transmit the second power failure signal to the transmission path of the main control unit (10), and the main control unit (10) uses a normal interrupt processing terminal and an NMI interrupt processing terminal. When a first power failure signal is supplied to a normal interrupt processing terminal, a power failure in the power control adapter (18) is recognized,
When the second power failure signal is supplied to the NMI interrupt processing terminal, emergency processing at the time of power failure is performed.

[Operation] In the power supply control device of the present invention having such a configuration, the power on and off of the main power supply and various units can be easily performed by one-touch operation of the power switch provided in the main control device.

Even if the commercial AC power supply for the unit is taken from the same distribution board as the main power supply, the power supply to the various units connected to the power control adapter is performed sequentially after the main power supply. The withstand current can be suppressed, and the cost can be reduced.

Furthermore, even if the power supply of the unit is taken from a power distribution panel different from the main power supply, the power failure of the unit can be independently detected and notified to the main control unit. Even if the main controller only needs to recognize that a power failure has occurred on the unit side, it can determine whether it is necessary to take appropriate power failure countermeasures such as save processing, etc. Minimize system reliability.

[Embodiment] Fig. 2 is an embodiment configuration diagram showing one embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a main controller, which is a main controller.
CP for controlling general units connected externally
U30, power switch 14, power on / off control unit 16, power supply that receives power from commercial AC power supply AC100V-1 and outputs power DC
24 are provided.

The power-on / off controller 16 is provided with a power-on instruction signal S1 for controlling the power-on of the power source 24 when receiving the power-on operation of the power switch 14, and a power-supply control adapter 18 which will be clarified in the description after being provided outside. Are sequentially transmitted.

The power supply 24 is provided with a power failure detection circuit 32.
The power failure detection output of 32 is given as an NMI interrupt signal to the CPU 30 through the OR gate 34, and the power failure detection circuit 32
Upon receiving an NMI interrupt signal based on the detection of a power failure, forcible termination processing of files and the like is executed.

The power control adapter 18 is connected to a power control line 48 drawn from the main controller 10.

The power supply control adapter 18 receives a commercial AC source 100V-2, and the power supply adapter 18 has 4
Power outlets 38-1 to 38-4 are provided, and the power outlets 38-1 to 38-4 are provided with a general unit such as a modem.
The power supply is connected to 12-a, printer 12-b, FAX 12-c and optical disk 12-d.

A power supply sequence circuit 35 is provided in the power supply control adapter 18, and the power supply sequence circuit 35 receives a power-on instruction signal S2 from a power-on / off control unit 16 provided in the main control unit 10 via a power supply control line 48, and outputs a sequence signal. SQ1 to SQ4 are sequentially output. Sequence signals SQ1-S from the power supply sequence circuit 35
Q4 is given to relays 36-1 to 36-4 indicated by relay contacts, and the relays 36-1 to 36-4 close the relay contacts by sequence signals SQ1 to SQ4. One of the relays 36-1 to 36-4 is commonly connected and connected to a commercial AC source AC100V-2, and
The other of 36-4 is connected to power outlets 38-1 to 38-4, respectively.

Further, the power supply sequence circuit 35 receives the power-on instruction from the main control device 10, that is, outputs the sequence signals SQ1 to SQ4 and closes the relay contacts of the relays 36-1 to 36-4. When the disconnection instruction signal, specifically, the ON instruction signal S2 is cut off from the 10 side, the sequence signals SQ1 to SQ4 are sequentially turned off and the relay contacts of the relays 36-1 to 36-4 are sequentially opened.

Further, the power supply control adapter 18 is provided with a power failure detection circuit 20 for detecting a power failure of the commercial AC source AC100V-2. The detection output of the power failure detection circuit 20 is input to one of the AND gates 42 and 44. The output of the setting device 40 is connected to the other input of the AND gate 42, and the output of the setting device 40 is connected to the other input of the AND gate 44 via the inverter 46. Setting device 40 is AN
One of the D gates 42 and 44 is set in an allowable state,
As shown in the figure, when the contacts of the setting device 40 are not grounded, an H level output is generated and the AND gate 42 is allowed, while the L level output of the inverter 46 disables the AND gate 44. I have. Therefore, when the power failure detection circuit 20 generates a detection output in this state, a power failure detection signal is sent to the main control device 10 via the AND gate 42, and the power failure detection signal from the AND gate 42 is output to the CPU 30 provided in the main control device 10. Is notified of a power failure of the power supply control adapter 18 as a normal interrupt signal INT to the power supply.

The setting of the AND gate 42 by the setting unit 40 as described above is performed when only the units other than the optical disk 12-d that do not require the forced termination process at the time of the power failure are connected to the power control adapter 18.

On the other hand, as shown in FIG.
If a unit that requires emergency processing such as forced termination processing is connected at the time of a power failure such as 12-d, close the contacts of the setting unit 40 and connect them to ground to set the output of the setting unit 40 to L level. , The AND gate 42 is disabled and the inverter 4
The H level output of 6 puts the AND gate 44 in an allowable state. The power failure detection signal from the AND gate 44 based on the power failure detection by the power failure detection circuit 20 when such an AND gate 44 is set to the allowable state by the setting device 40 is transmitted to the CPU 30 of the main controller 10 in an emergency such as a forced termination process. It is output as an interrupt signal NMI requesting processing, so that the output of the AND gate 44 is
It is connected to the interrupt port NMI of the CPU 30 through the OR gate 44 of 0.

Next, the operation of the embodiment of FIG. 2 will be described with reference to the operation timing chart of FIG.

First, the main controller 10 is connected to the commercial AC source AC100V-1,
Also, the power supply control adapter 18 is connected to a commercial AC source AC100V-2. It is assumed that the commercial AC sources AC100V-1 and AC100V-2 are obtained from different distribution boards, for example.

Subsequently, as shown at time t1 in FIG. 3, when the power switch 14 provided on the main control device 10 is turned on, the power on / off control unit 16 receives the power switch 14 operation and first turns on its own power supply. An input signal S1 is output to the power supply 24, whereby the power supply 24 is activated and supplies a DC output to the main control unit 10.

Power on / off control unit at the same time as DC output by this power supply 24
Reference numeral 16 sends an input signal S2 to the power supply control line 48.

The input signal S2 sent to the power supply control line 48 is supplied to the power supply sequence circuit 35 of the power supply control adapter 18, and the power supply sequence circuit 35 sequentially sends out the sequence signals SQ1 to SQ4, whereby the relays 36-1 to 36-4 Relay contacts close in sequence,
AC outlet 100V-2 for power outlets 38-1 to 38-4
1 ~ 100V-24 AC, and power supply outlets 38-1 ~ 38-4 as general units: modem 12-a, printer 12-b, fax 12-
Since the optical disk c and the optical disk 12-d are connected, power is supplied to these general units sequentially.

Subsequently, assuming that the power switch 14 provided on the main control device 10 is turned off at time t2 after the power-on instruction, the power-on / off control unit 16 first turns off the input signal S1 to its own power source 24, Disconnects the DC output of power supply 24,
At the same time as the interruption of the DC output by the power supply 24, the input signal S2 sent to the power supply control line 48 is turned off.

The power supply sequence circuit 35 sequentially turns off the sequence signals SQ1 to SQ4 in response to the turning-off of the input signal S2 to the power control line 48, whereby the relay contacts of the relays 36-1 to 36-4 are opened, and the power outlet 38- The power supply to the general units connected to 1 to 38-4 is sequentially cut off.

 Next, control processing at the time of power failure will be described.

If, for example, the commercial AC source AC100V-1 that supplies the main control device 10 with the main control device 10 and the power control adapter 18 being powered on has a power failure, the power failure detection circuit 32 generates a power failure detection output, and the OR A power failure detection signal is notified to the NMI interrupt port via the gate 34, and upon receiving the power detection signal for the NMI interrupt port, the CPU 30 performs a save process for forcibly terminating the access process of the file or the like being executed at that time. To run.

On the other hand, when the power is supplied by the main controller 10 and the power control adapter 18, the commercial AC
Assuming that 100V-2 has a power failure, the power failure detection circuit 20 outputs a power failure detection signal. At this time, since the optical disk 12-d is connected to the power outlet 38-4 of the power control adapter 18, the setting unit 40 generates an L level output by connecting the contact to the ground, and only the AND gate 44 is allowed. And therefore,
The power failure detection signal from the power failure detection circuit 20 is notified to the NMI interrupt port of the CPU 30 via the AND gate 44 and the OR gate 34 of the main controller 10. As a result, the CPU 30 knows the power failure of the power control adapter 18, and if the power failure is detected, the optical disc 12-d
If an access was received from the CPU 30 and it was in the middle of a write operation, the sector data being written is recognized as error data when a power failure was detected, and an error due to recovery processing after a power failure recovery or a power failure occurred. Processing for ignoring sector data can be performed. Further, in response to the input of the power failure detection signal to the NMI interrupt port, a recording process for recording the occurrence of a power failure is performed in the CPU 30.

Of course, if only units that do not require emergency processing at the time of power failure, such as an optical disk, are connected to the power control adapter 18, the contacts of the setting unit 40 are not grounded,
The power failure detection signal of the power failure detection circuit 20 is notified from the AND gate 42 to the INT port of the CPU as a general interrupt signal.In this case, the CPU 30 performs access to the unit connected to the power supply control adapter 18 in which the power failure has occurred. Processing for stopping until the power is restored is performed.

In the embodiment shown in FIG. 2, the case where one power control adapter 18 is connected to the power control line 48 drawn out from the main controller 10 is taken as an example. Needless to say, a plurality of control adapters 18 may be provided in group units. When a plurality of power control adapters 18 are connected in this way, it is preferable that the main control device 10 performs a power sequence for the plurality of power control adapters 18 and sequentially sends a turn-on signal to each power control adapter 18. .

[Effects of the Invention] As described above, according to the present invention, it is possible to sequentially turn on and off the power of the externally connected general unit by one-touch operation of the power switch provided in the main control device.

Further, since the power supply of the general unit is sequentially performed, the rush current can be suppressed low, and the rush current resistance of the distribution board can be reduced to reduce the cost.

In addition, even for momentary interruptions and power failures, the general unit can select the content of the power failure detection notification to the main control unit in accordance with the situation of the unit side. The device can perform processing based on whether it is sufficient to simply recognize the power failure on the unit side or perform power failure processing such as save processing, and can take appropriate power failure countermeasures against a power failure. .

[Brief description of the drawings]

 FIG. 1 is a view for explaining the principle of the present invention; FIG. 2 is a block diagram of an embodiment of the present invention; FIG. 3 is an operation timing chart of the present invention; FIG. 6 is an operation timing chart of FIG. In the figure, 10: Main controller 12-1 to 12-n: Unit 12-a: Modem 12-b: Printer 12-c: FAX 12-d: Optical disk 14: Power switch 16: Power on / off section (Power on / off) Disconnection circuit) 18: Power supply control adapter 20: Power failure detection unit (power failure detection circuit) 24: Power supply 30: CPU 32: Power failure detection circuit 34: OR gate 35: Power supply sequence circuit 36-1 to 36-4: Relay contact 38- 1 to 38-4: Power outlet 40: Setting device 42,44: AND gate 46: Inverter

Claims (1)

(57) [Claims] 1. A power control device for a system including a plurality of units (12-1 to 12-n) controlled by a main control device (10), wherein the power control device is provided in the main control device (10). Power switch (14)
A power-on / off control unit (16) for sequentially transmitting a self-control and an external-use power-on or power-off signal in response to a power-on or power-off operation; and a power-on / off control unit (16) When receiving an instruction signal or a disconnect instruction signal, the unit (12-1 to 12-n)
And a power control adapter (18) for sequentially supplying commercial AC power or sequentially interrupting the supply of commercial AC power, wherein the power control adapter (18) shuts down the power of the commercial AC power in a power-on instruction state. A power failure detection unit (20) for transmitting a power failure detection signal for notifying the main control device (10) of the power failure detection when the power failure is detected, and transmitting the power failure detection signal to a first transmission line via a first power failure signal; And a selection circuit (42, 44, 46) for selecting whether to transmit as a second power failure signal to the second transmission path, and the main control unit (10) includes a normal interrupt processing terminal And NMI
A CPU having an interrupt processing terminal, wherein when the first power failure signal is supplied to the normal interrupt processing terminal, a power failure in the power control adapter (18) is recognized, and the NMI interrupt is detected. A power supply control device, wherein when the second power failure signal is supplied to a processing terminal, emergency processing at the time of power failure is performed.