JPH0223080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a condition monitoring method for monitoring whether the control status of each device is normal or abnormal in a building monitoring method that centrally controls and monitors many devices such as air conditioners and fans. It is.

In conventional building monitoring systems, a central control unit controls the on/off operation of distributed air conditioners, fans, lights, and other equipment, and the control commands are displayed or memorized using lamps, etc. but,
Since it does not have a configuration that notifies the central controller of status information on whether each device has turned on, off, etc. in response to a control command, it is difficult to determine whether each device is in a state corresponding to the control command. It was not possible to monitor whether or not they were getting used to it.

In addition, in various control systems, there is a method in which status information such as whether the controlled device is turned on or off is transferred to the control device and the controlled device is monitored by the control device. Since it was not a confirmation, it was not possible to identify abnormalities in the control status.

The present invention identifies whether or not a device operates normally in accordance with a control command, as well as when the state of the device changes even though no control command has been sent, to determine whether the device is normal or abnormal. The purpose is to monitor. Examples will be described in detail below.

FIG. 1 is a block diagram of an embodiment of the present invention, where CT is a master station, SM is a scanning memory,
MDM is modem, RT1~RTn, RTA1~
RTAm is a slave station, A11 to Anm are devices such as air conditioners, fans, lights, temperature detectors, etc., and B11 to Bml are devices for disaster detection and fire extinguishing such as smoke detectors and pumps. BACKGROUND ART Equipment such as air conditioners, fans, lights, pumps, etc. that turn on and off, etc. have sensors such as relays that detect their operating states. Also scanning memory
The SM has an area corresponding to each device, and the status information of the device is written and stored.

In a high-rise building, the number of the above-mentioned devices is about 10,000, and 10 to 200 slave stations are installed. These slave stations have the function of detecting and storing changes in the status of each device, and notifying changes in the status of the equipment by scanning from the master station CT. The device number is transmitted from the slave station to the parent station by scanning the device, reading whether there is a change in the status of the device corresponding to the slave station, and inquiring which device it is from the slave station that accommodates the device with the change in status. The station CT is notified, and the master station CT updates the contents of the scanning memory SM. In this case, if it is determined that the state of the device has not changed in accordance with the control command, alarm information is output. For example, if a change in the state to start operation occurs even though a control command to start operation has not been sent to an air conditioner that is in a stopped state, the master station CT will receive an alarm information by receiving the status information when the control command is not being sent. Output.

Also, when the master station CT specifies a device and sends a control command according to the operator's operation or program,
A slave station that accommodates the designated device receives the control command and controls the designated device. Since the status changes accordingly, status information is sent to the master station CT. master station
The CT updates the scanning memory SM with status information, and also compares the sent control command with the received status information. If the comparison matches, it is determined to be normal, and if the comparison does not match, it is determined to be abnormal. In the case of an abnormality, alarm information is issued. Output.

FIG. 2 is a block diagram of the main parts of the master station according to the embodiment of the present invention, and 1 indicates whether the control information CONT input by the operator or the program is to turn the device on or off. 2 is a scanning memory, 3 is an identification circuit 1 for identifying
A state comparison circuit 4 compares the on/off information identified by the on/off information with the current on/off state information of the device read from the scanning memory 2, and sends a control command when the comparison does not match. a memory for storing control commands output from the state comparison circuit 3;
5 is a timer that is activated when a control command is written in the memory 4; 6 is a timer that sends control command a to the slave station via the modem; and status information b via the modem.
7 is a status identification circuit that identifies whether the status information indicates whether the device is on or off; 8 is a status identification circuit 7 that identifies the contents of the memory 4;
9 is a write control circuit for the scanning memory 2, and the timer 5 is reset by the match signal d from the comparison circuit 8 and the time-over signal c from the timer 5. is cleared. Also, the time-over signal c and the discrepancy signal e from the comparator circuit 8 are alarm signals.
Output as ALM.

First, when control information CONT that specifies a device and changes it from an off state to an on state is input, the identification circuit 1 identifies it as on control information,
Further, the status information of the designated device is read from the scanning memory 2 and added to the status comparison circuit 3. When the designated device is in the OFF state and the ON control information is input, the status comparison circuit 3 finds that the comparison result does not match, and therefore outputs an ON control command and outputs it to the slave station via the interface circuit 6.

Also, the ON control command is added to and stored in the memory 4, thereby starting the timer 5. Also, the device is controlled from off to on by the on control command,
When receiving the on-state information b that detects the state change, the state identification circuit 7 identifies the on-state, and the write control circuit 9 rewrites the state information of the scanning device 2, Also, the comparison circuit 8 compares the ON control command of the memory 4 with the ON state information from the identification circuit 7, and since both are ON, a coincidence signal d is output, and the timer 5
is reset and the contents of memory 4 are cleared.

Also, if the state of the device does not change within the time set by timer 5 after sending the control command, the state information b cannot be received, so a time-over signal c is output, and an alarm signal ALM is output as a control error. . Then, the timer 5 is reset and the memory 4 is cleared in order to control other equipment.

In addition, when status information due to a change in the status of the equipment is received even though no control command is sent, the scanning memory 2 is rewritten and the comparison circuit 8 receives the result of identifying whether the status information is on or off. is added from the identification circuit 7. In this case, since the control command is not stored in the memory 4, the comparison circuit 8 outputs a mismatch signal e, and an alarm signal ALM is output as an abnormal state change.

As explained above, in the present invention, various devices such as air conditioners, fans, electric lights, pumps, etc. are distributed,
In a system where central control is performed from a center such as a master station CT, each device has a means for detecting its on/off status using a sensor such as a relay and transmitting status information.
A center such as a master station CT stores a first memory such as scanning memory 2 that stores status information corresponding to each device, and a control command for controlling each device, such as turning on or off, when sending out a control command. Comparing means includes a state comparison circuit 3, etc., which compares the command with the contents of the first memory and sends out the control command when the comparison does not match; and a timer 5, which is activated by sending out the control command; A second memory for temporarily storing control commands.
and a memory 4, when status information due to a change in status of the device controlled by sending a control command is received within the set time of the timer 5, the memory 4
If the contents of the control command stored in the controller and the received status information match, it is determined that the control was performed normally.If they do not match, it is determined that the status change is abnormal and an alarm signal ALM is output. If the status information cannot be received within the set time in step 5, it is determined that there is a control abnormality and an alarm signal ALM is output.

In addition, if status information due to a change in the status of the device is received even though no control command is sent, the control command is not stored in the memory 4, so it is determined that the status change is abnormal, as in the case of mismatch described above. and outputs the alarm signal ALM.

Therefore, it is possible to easily identify whether or not each device is operating normally in response to control from the center, and if the device changes its state automatically without sending a control command, For example, when an air conditioner suddenly stops operating due to an abnormality in its motor, an alarm signal is output, making it possible to easily identify the equipment abnormality.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG.
The figure is a block diagram of essential parts of a master station according to an embodiment of the present invention. CT is the master station, RT1 to RTn, RTA1 to RTAm are slave stations, MDM is the modem, A11 to Anm, B11
~Bml is equipment such as air conditioners and smoke detectors, SM, 2 is scanning memory, 1 is identification circuit, 3 is status comparison circuit, 4 is memory, 5 is timer, 6 is interface circuit, 7 is status identification 8 is a comparison circuit, and 9 is a write control circuit.

Claims (1)

[Scope of Claims] 1. In a system in which a large number of distributed devices are centrally controlled by a center, the device has means for detecting states such as on and off and transmitting state information, and The center compares the contents of the first memory with a first memory that stores the state information corresponding to each device, and the control command that controls turning on, off, etc. of the device when sending the control command. and a comparison means for transmitting the control command in the case of a comparison mismatch, a timer activated by transmission of the control command, and a second memory temporarily storing the control command, and transmitting the control command. When the center receives status information due to a change in the status of a device controlled by the center within the set time of the timer, and the received status information matches the content of the control command stored in the second memory, the device is determined to be normal, and when there is a discrepancy, or when the status information cannot be received within the set time of the timer, or when status information due to a change in the status of the appliance is received when the control command is not sent, the status information of the appliance is determined to be normal. A condition monitoring method that outputs an alarm signal when it determines that there is an abnormality.