JPH0532974B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an internal power supply system for a control device, and particularly to an internal power supply system that eliminates waste in power capacity.

[Conventional technology]

In a control device consisting of a system control unit and a plurality of controlled units controlled by the system control unit, there are two methods for supplying power to the central control unit and the controlled units.

Figure 2 is a configuration diagram showing a single power supply system, where 1 is the system control unit and the arithmetic processing unit (CPU).
It controls the entire system, including calculation processing of input and output data. 1a is a power supply, 21,
Reference numeral 22 denotes a controlled unit that operates, for example, a motor or converts and receives signals from a switch or the like. Note that the power supply 1a is a power supply that supplies power to both the system control unit 1 and the controlled units 21 and 22. 3 is the 0V line of the power supply line, 4 is the DC power supply line (hereinafter referred to as
(denoted as DC) 5V line, 5 is the control signal line. Although only two controlled units 21 and 22 are shown in the figure, the number may increase or decrease depending on the purpose of use.

Figure 3 is a configuration diagram showing the power distribution system, where parts with the same symbols as in Figure 2 indicate the same parts, 1b is a power supply that supplies power only to the system control unit, 21
b is a power supply that supplies power only to the controlled unit 21, and 22b is a power supply that supplies power only to the controlled unit 22.

[Problem that the invention seeks to solve]

In the conventional single power supply system as described above, for example, when the number of controlled units 21 and 22 increases or decreases depending on the request from the user of the control device, in other words, the number of controlled units 21 and 22 increases or decreases depending on the system configuration. Considering the case where the number of control units increases or decreases, it is necessary to equip the power supply 1a with the maximum capacity, and if the number of control units 21 and 22 is small, the power supply capacity will be wasted. There was a problem. Further, although it is sufficient to change the power supply capacity depending on the number of controlled units 21 and 22, there is a problem in that this poses a problem on the device manufacturer's side in that standardization is hindered.

Next, in the conventional power distribution method, as a result of distributing the power sources, each power source has its own margin, so
There is a problem that the system may have a power supply capacity that is too small in use, and the power supply capacity tends to be wasted.

The present invention was made to solve these problems, and aims to provide a power supply system for a control device that eliminates wasted power capacity.

[Means for solving problems]

A power supply system for a control device according to the present invention includes providing a basic power supply attached to a system control unit,
When a number of controlled units are connected exceeding the capacity of the basic power supply mentioned above, an additional power supply is provided attached to at least one of the controlled units, and each controlled unit is supplied with power from the power supply line from the basic power supply mentioned above. A switch means is provided for setting in advance, at the time of system configuration, whether to receive power from the power source or from the power supply line from the additional power source.

[Effect]

In this invention, there are multiple power supply lines including a line from the basic power supply and a line from the additional power supply, and each controlled unit is provided with a switch means for setting in advance from which source it receives power at the time of system configuration. When the number of connected controlled units increases and the system exceeds the capacity of the basic power supply, an additional power supply is used, so the power supply capacity is not wasted.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention. In FIG. 1, parts with the same symbols as in FIGS. 2 and 3 indicate the same parts, 1c is the basic power supply,
This is a power supply that is attached to the system control unit 1 and supplies power to the system control unit 1 and the controlled units 21. 22c is an additional power supply, basic power supply 1c
Since the power supply capacity is insufficient to supply power to the controlled unit 22, it is provided attached to the controlled unit 22 to supply power to the controlled unit 22. 4a is a CD5V power supply line from the basic power supply, and 4b is a CD5V power supply line from the additional power supply. 6 is a switch which connects the controlled unit 21 or 2
2 is a switch for setting which of the power supply lines mentioned above receives power supply; in this embodiment, the controlled unit 21 is set to receive power from the power supply line 4a, and the controlled unit 22 is set to receive power from the power supply line 4a.
It is set to receive power from b. That is, which power supply line the controlled unit 21 or 22 receives power from is set in advance by the switch 6 at the time of system configuration.

As described above, since the additional power supply 22c is added when the capacity of the basic power supply 1c is insufficient, the power supply capacity is not wasted.

In the above embodiment, the additional power supply 22c supplies power only to the controlled units 22, but when the number of controlled units increases, the number of units to be supplied with power can be increased without exceeding the capacity of the power supply 22c. Further, the number of additional power supplies 22c is not limited to one, and may be added according to the number of controlled units. Furthermore, the number of controlled units supplied with power by the basic power supply 1c is not limited to one, but the number of controlled units supplied with power from the basic power supply is determined by the power supply capacity of the basic power supply and the capacity used by the controlled units. All you have to do is decide.

Furthermore, although the power supply line is set using the switch 6, it is clear that the setting of the power supply line is not limited to the switch and may be performed by changing the connection.

〔Effect of the invention〕

As explained above, the present invention has multiple power supply lines including a line from the basic power supply attached to the system control unit and a line from the additional power supply provided on the controlled unit side, and each controlled unit has a plurality of power supply lines. A switch means is provided to preset whether to receive power from the main power supply during system configuration, and when the number of connected controlled units increases and the system exceeds the capacity of the basic power supply, an additional power supply is used.
There is no waste in power supply capacity, and an inexpensive power supply system can be obtained with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional single power source system, and FIG. 3 is a block diagram showing a conventional power source distributed system. In the figure, 1 is a system control unit, 1c
is the basic power supply, 3 is the 0V line of the power supply line, 4a
is the DC5V power supply line from the basic power supply, 4b is the DC5V power supply line from the additional power supply, 5 is the control signal, and 6
is a switch means, 21 and 22 are controlled units,
22c is an additional power supply. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A control device consisting of a system control unit and controlled units controlled by the system control unit, in which the number of controlled units increases or decreases depending on the configuration of the system. In a power supply method for supplying power, when the basic power supply attached to the system control unit and the controlled units are connected in a capacity exceeding the capacity of this basic power supply, at least one of the controlled units An additional power supply provided as an accessory, a plurality of power supply lines consisting of a power supply line from the basic power supply and a power supply line from the additional power supply, and a plurality of power supply lines provided in each of the controlled units and the plurality of power supply lines. 1. A power supply system for a control device, comprising a switch means for presetting from which source power is to be supplied at the time of system configuration.