JPH1022883A - Facility-managing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facility-managing device which does not output an undefined signal to a transmission line in the case of reset operation of the facility managing device. SOLUTION: Concerning the facility managing device, having a driver part 6 which is connected through a transmission line to the other facility managing device, mutually converts a transmission signal and a serial signal and transmits signals to the other facility managing device when transmission is permitted by a transmission permit signal, communication control part 3 for outputting the serial signal to the driver part, receiving the serial signal from the driver part and outputting the transmission permit signal to the driver part, and reset part 5 for outputting a reset signal when resetting the facility managing device, this device is provided with a gate 9, which is interposed between the communication control part and the driver part, for outputting the transmission permit signal to the driver part only when no reset signal is outputted and the transmission permit signal is outputted from the communication control part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a facility management apparatus for transmitting and receiving transmission signals.

[0002]

2. Description of the Related Art FIGS.
This will be described with reference to FIG. FIG. 2 is a configuration diagram of an equipment management system using the equipment management device. FIG. 3 is a block diagram illustrating the configuration of the equipment management device. FIG. 4 is a time chart of signals output from the reset unit.

In FIG. 2, reference numeral 1 denotes a central monitoring panel corresponding to an equipment management apparatus, and reference numeral 2 denotes a sub monitoring panel corresponding to an equipment management apparatus.

[0004] A central monitoring panel 1 is installed in a control room of a building or the like, monitors and displays the status of lighting equipment, air conditioning equipment, power equipment, and the like in the building, and performs operations by a manager and preset settings. Each facility is controlled on the basis of this.

The sub-monitoring panel 2 is installed in a location separate from the central control panel 1, such as a sub-control room, away from the control room, and centrally monitors the state of each equipment monitored by the central monitoring panel 1. The transmission signal including control instruction information for instructing the central monitoring panel 1 to control each facility by receiving and displaying from the panel 1 and receiving an operation of a manager or the like is transmitted to the central monitoring panel 1.

In FIG. 3, a sub-monitoring panel 2 includes a communication control unit 3,
Main control unit 4, reset unit 5, driver unit 6, display unit 7,
It has an operation unit 8.

The driver section 6 has a transmission driver 6a and a reception driver 6b. An output terminal of the transmission driver 6a and an input terminal of the reception driver 6b are connected to a transmission line L1, and the transmission line L1 is connected to the center. It is connected to the monitoring panel 1. The input terminal of the transmission driver 6a is connected to the communication control unit 3
Is connected to the transmission port 3a of the
The output terminal b is connected to the receiving port 3b of the communication control unit 3.

[0008] The receiving driver 6b receives -2.5 [V] to 2.5 received from the central monitoring panel 1 via the transmission line L1.
The differential transmission signal S1 of [V] is set to 0 [V] or 5 [V].
And outputs the serial signal S2 to the communication control unit 3. The transmission signal S1 received by the receiving driver 6b from the central monitoring panel 1 is information indicating the state of each facility monitored by the central monitoring panel 1.

The transmission driver 6a converts the serial signal S3 received from the communication control unit 3 into a differential transmission signal S4 and outputs the signal to the transmission line L1. Further, the transmission driver 6a connects the control line L to the control port 3c of the communication control unit 3.
2 if the transmission permission signal S5 is input from the control port 3c, and performs the above-described conversion output operation. If the transmission inhibition signal S6 is input, the conversion output operation is performed. And the transmission signal S4 is not transmitted to the central monitoring panel 1 via the transmission line L1. The transmission driver 6
The serial signal S3 received from the communication control unit 3 by a is control instruction information for each facility monitored and controlled by the central monitoring panel 1.

The communication control unit 3 has a transmission port 3a, a reception port 3b, and a control port 3c, and these ports are connected to the driver unit 6. When receiving the serial signal S2 from the receiving driver 6b via the receiving port 3b, the communication control unit 3 converts the serial signal S2 to, for example, 8
The signal is converted to a bit or 16-bit parallel signal S7 and output to the main control unit 4. The communication control unit 3 includes a main control unit 4
When the parallel signal S8 is received from the transmission port 3a, the signal is converted into a serial signal S3 and output from the transmission port 3a to the transmission driver 6a, and a high control permission signal S5 is output from the control port 3c to the transmission driver 6a. The communication control unit 3 normally outputs the low transmission inhibit signal S6 to the transmission driver 6a constantly, and outputs the transmission permission signal S5 only when the serial signal S3 is output to the transmission driver 6a. Therefore, the serial signal S3 is transmitted to the transmission driver 6a.
When the transmission driver 6a receives the transmission inhibit signal S6 even if an unstable signal appears at the transmission port 3a, the unstable signal is not transmitted to the central monitoring panel 1.

When receiving the reset signal S9 from the reset unit 5, the communication control unit 3 performs a reset operation.

The main control unit 4 outputs a parallel signal S7 received from the communication control unit 3 to the display unit 7 to display the status of each facility, and in accordance with an operation of the operation unit 8, a parallel signal containing control instruction information. The signal S8 is output to the communication control unit 3.

When receiving a reset signal S9 from the reset section 5, the main control section 4 performs a reset operation.

As shown in FIG. 4, when the power of the sub-monitoring panel 2 is turned on, the reset unit 5 outputs a low reset signal for a predetermined time T1, which is slightly longer than the time required for the power supply voltage to reach the rated voltage. S9 is output to the main control unit 4 and the communication control unit 3. The reset unit 5 constantly monitors the power supply voltage during the operation of the sub monitoring panel 2, and the power supply voltage is lower than a rated voltage (for example, 5 [V]) by a predetermined voltage (for example, 4.75).
[V]), the reset signal S9 is output to the main control unit 4 and the communication control unit 3. Note that the reset unit 5 always outputs a High steady signal S10 to the main control unit 4 and the communication control unit 3 if the power supply voltage is equal to or higher than the predetermined voltage after a lapse of T1 time after the power is turned on.

Next, the operation of the sub-monitoring panel 2 configured as described above will be described. First, when the power is turned on, the power supply voltage gradually increases as shown in FIG.
During this period, the reset unit 5 outputs a reset signal S9 to the main control unit 4 and the communication control unit 3. Main control unit 4 and communication control unit 3
Means that when the reset signal S9 is received, the respective reset operations are performed.

Then, as shown in FIG. 4, when the power supply voltage becomes the rated voltage and the time T1 elapses, the reset unit 5 outputs a steady signal S10 to the main control unit 4 and the communication control unit 3 to be in an operation state.

In this operation state, when the transmission signal S1 is transmitted from the central monitoring panel 1 to the reception driver 6b, the state information of each facility, which is the content of the transmission signal S1, is transmitted to the communication control unit 3.
And is displayed on the display unit 7 via the main control unit 4.
On the other hand, when an operation is performed by a manager or the like on the operation unit 8, the operation reaches the transmission driver 6a in the state of a serial signal S3 via the main control unit 4 and the communication control unit 3 as control instruction information. The transmission permission signal S5 is output from the transmission port 3c to the transmission driver 6a. Therefore, the transmission driver 6a converts the serial signal S3 into a transmission signal S4, outputs the signal to the transmission line L1, and transmits control instruction information to the central monitoring panel 1.

[0018]

However, the equipment management apparatus as shown in FIG. 3 has the following problems.

That is, the communication control unit 3 cannot always output the transmission prohibition signal S6 from the control port 3c when the power is turned on or when the power supply voltage is lowered and the operation becomes unstable, and the transmission permission signal Either S5 or the transmission prohibition signal S6 is output or undefined, or the transmission permission signal S5
Only output. When the power supply voltage decreases and the operation becomes unstable, the communication control unit 3 sets the transmission port 3
A signal having no meaning for a is output. When the power supply voltage drops, a meaningless serial signal S3 is input to the transmission driver 6a, and the transmission permission signal S5
Is input to the transmission driver 6a, and a meaningless transmission signal S4 is output to the transmission line L1. Then, the central monitoring panel 1 receiving the transmission signal S4 determines that a transmission abnormality such as a failure of the sub monitoring panel 2 has occurred.

Therefore, when the power is turned on or when the power supply voltage falls below a predetermined voltage, the central monitoring panel 1 determines that a transmission error has occurred, and erroneously displays the error even though no error has occurred. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a communication control unit for turning on the power of an equipment management device or when the power supply voltage falls below a predetermined voltage. Is to provide a facility management device that does not output an indefinite signal to a transmission line when performing a reset operation.

[0022]

According to the present invention, in order to solve the above-mentioned problems, the present invention is connected to another equipment management apparatus via a transmission line, and is provided with another equipment management apparatus. The transmission signal received from the device is converted to a serial signal and output to the communication control unit. If transmission is permitted by the transmission permission signal, the serial signal received from the communication control unit is converted to a transmission signal and converted to another transmission signal. Driver section to transmit to equipment management device, and output serial signal to driver section according to operation of operation section, receive serial signal converted from transmission signal from driver section, and permit transmission to driver section And a reset unit that outputs a reset signal when resetting the equipment management device. And a gate that outputs a transmission permission signal to the driver unit only when the reset signal is not output and the transmission permission signal is output from the communication control unit. It is.

[0023]

1 and 4 show an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the equipment management device. FIG. 4 is a time chart of signals output from the reset unit. In FIG. 1, the same reference numerals are given to the same parts as those of the equipment management device described in the above-described conventional technique, and the detailed description of the same parts will be omitted.

The sub-monitoring panel 2 corresponding to the equipment management apparatus of the present embodiment shown in FIG. 1 is different from the sub-monitoring panel 2 described in the above-mentioned prior art and has the following features. .

That is, a gate 9 for receiving the output of the reset section 5 and the output of the control port 3c and outputting the transmission permission signal S11 or the transmission inhibition signal S12 to the transmission driver 6a is provided. Also, a reset signal S9 or a steady signal S10 is output.

The gate 9 obtains the logical product of the input from the reset unit 5 and the input from the control port 3c, and outputs the high transmission permission signal S11 or the low transmission prohibition signal S12 according to the value of the logical product. Output. That is, the gate 9 outputs the transmission permission signal S11 to the transmission driver 6a only when receiving the high steady state signal S10 from the reset unit 5 and receiving the high transmission permission signal S5 from the control port 3c. On the other hand, when the gate 9 receives the low reset signal S9 from the reset unit 5, it receives the high transmission permission signal S5 from the control port 3c, receives the low transmission prohibition signal S6, and outputs the transmission prohibition signal S12. Output to the transmission driver 6a.

The operation of the sub monitoring panel 2 when the power is turned on and when the power supply voltage falls below a predetermined voltage will be described below.

First, when the power is turned on, the power supply voltage gradually increases as shown in FIG. 4, and during a time T1, the reset unit 5 sends a reset signal to the main control unit 4 and the communication control unit 3. S9 is output. When receiving the reset signal S9, the main control unit 4 and the communication control unit 3 perform a reset operation.

At this time, since the reset signal S9 is input to the gate 9 from the reset unit 5, even if the gate 9 receives the transmission permission signal S5 from the transmission port 3c, the logical product of both signals is Low. Therefore, the transmission inhibition signal S
12 is output to the transmission driver 6a. Accordingly, when the communication control unit 3 is in an unstable state during the reset operation, only the transmission inhibition signal S12 is input to the transmission driver 6a, so that even if the serial signal S3 is input from the transmission port 3a, the transmission driver 6a does not output the transmission signal S4 to the transmission line L1.

Then, as shown in FIG. 4, when the power supply voltage becomes the rated voltage and the time T1 elapses, the reset unit 5 outputs a steady signal S10 to the main control unit 4 and the communication control unit 3, and the sub monitor The board 2 is in an operation state. At that time, the reset unit 5 also outputs the steady signal S10 to the gate 9. Therefore, when receiving the transmission prohibition signal S6 from the transmission port 3c, the gate 9 calculates the logical product of the transmission prohibition signal S6 and the steady signal S10, and outputs the transmission prohibition signal S12 to the transmission driver 6.
a, and upon receiving the transmission permission signal S5 from the transmission port 3c, calculates the logical product of the transmission permission signal S5 and the steady signal S10 and outputs the transmission permission signal S11 to the transmission driver 6a. Therefore, in the operation state where the power supply voltage has reached the rated voltage, the gate 9 outputs the transmission permission signal S5 received from the transmission port 3c as it is to the transmission driver 6a as the transmission permission signal S11.

Next, when the power supply voltage of the sub monitoring panel 2 is lower than the predetermined voltage, the power supply voltage gradually decreases as shown in FIG.
Outputs a reset signal S9 to the main control unit 4 and the communication control unit 3. When receiving the reset signal S9, the main control unit 4 and the communication control unit 3 perform a reset operation.

At this time, since the reset signal S9 is input from the reset section 5 to the gate 9, the transmission port 3c
Even if the transmission permission signal S5 is received from the transmission driver 6a, the transmission inhibition signal S12 is output to the transmission driver 6a because the logical product of both signals is Low. Communication control unit 3 during reset operation
Is unstable, the transmission inhibit signal S12 is input to the transmission driver 6a, so the transmission driver 6a does not output the transmission signal S4 to the transmission line L1.

Therefore, when the power is turned on or when the power supply voltage falls below a predetermined voltage, the central monitoring panel 1 determines that a transmission error has occurred, and erroneously displays the error even though no error has occurred. Not at all.

In the present embodiment, the main control unit 4 and the communication control unit 3 perform the reset operation even when the power supply voltage falls below the predetermined voltage. Since resetting when the power supply voltage falls is not necessarily required, the reset operation may be performed only when the reset signal S9 at the time of power-on is received, and the reset operation may not be performed when the power supply voltage falls below a predetermined voltage. .

[0035]

According to the equipment management apparatus of the present invention, the gate is interposed between the communication control section and the driver section, and the reset signal is output. Is output and the transmission permission signal is output to the driver unit only when the transmission control signal is output from the communication control unit. Therefore, when the power of the facility management device is turned on or the power supply voltage falls below a predetermined voltage. When the communication control unit performs a reset operation, it does not output an undefined signal to the transmission line,
Therefore, even when the relevant equipment management apparatus is performing a reset operation, another equipment management apparatus determines that a transmission error has occurred, and does not erroneously display an error even though no error has occurred. Is provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a facility management device of the present invention.

FIG. 2 is a configuration diagram of a facility management system using the facility management device.

FIG. 3 is a block diagram showing a configuration of a conventional equipment management apparatus.

FIG. 4 is a time chart of a signal output from a reset unit.

[Explanation of symbols]

 3 Communication control unit 5 Reset unit 6 Driver unit 9 Gate L1 Transmission line

Claims (1)

[Claims] 1. A transmission signal which is connected to another equipment management apparatus via a transmission line, converts a transmission signal received from the other equipment management apparatus into a serial signal, outputs the serial signal to a communication control unit, and permits transmission by a transmission permission signal. If so, a driver unit that converts a serial signal received from the communication control unit into a transmission signal and transmits it to another equipment management device, and outputs a serial signal to the driver unit according to the operation of the operation unit, and A communication control unit that receives a serial signal converted from a transmission signal from a driver unit and outputs a transmission permission signal that permits transmission to the driver unit, and a reset that outputs a reset signal when the equipment management device is reset. A communication control unit and a driver unit, wherein a reset signal is not output and a transmission permission signal is transmitted from the communication control unit. A gate for outputting a transmission permission signal to the driver unit only when the signal is output.