Equipment sensing system and equipment control device

A detection system comprising a main control device, a plurality of sensors, and a signal line, the main control device and the sensors being connected to the signal line, characterized in

• that each of the sensors comprises:
• detection means;
• storage means having its own ID code;
• send/receive means for sending data to and receiving data from the main control device through the signal line;
• and terminal-side control means which, upon the receipt of an instruction from the main control device through the send/receive means for the start of detection operation, allows the detection means to perform detection operation, and, upon the receipt of an instruction from the main control device for reading, sends data detected by the detection means to the main control device through the send/receive means, and
• that the main control device gives an instruction for the start of operation of the detection to the plurality of sensors connected to the signal line, then provides a predetermined standby period, and, after the elapse of the standby period, gives an instruction for reading to the individual sensors while specifying the ID codes.

A control device for equipment, comprising a signal line distributed to said equipment, main control means connected to the signal line, a sensor connected to the signal line, and a switching device which is connected to the signal line and functions to control the operation of mounted parts, characterized in

• that the sensor comprises:
• a detection device;
• storage means having its own ID code;
• send/receiver means for sending data to and receiving data from the main control means through the signal line;
• and sensor-side control means which receives data detected by the detection device, writes the received data in the storage means, and sends data stored in the storage means to the main control means through the send/receive means, and
• that the switching device comprises switching means, storage means having its own ID code, send/receive means for sending data to and receiving data from the main control means through the signal line, and switching device-side control means for controlling the switching means based on the data from the send/receive means.

A control device for equipment, comprising a signal line distributed to a cooling storeroom, main control means connected to the signal line, a temperature detection sensor connected to the signal line, and a switching device which is connected to the signal line and functions to control the operation of mounted parts including a compressor and a fan, characterized in

• that the sensor comprises:
• a temperature detection device;
• storage means having its own ID code;
• send/receive means for sending data to and receiving data from the main control means through the signal line;
• and sensor-side control means which receives temperature data detected by the temperature detection device, writes the received data in the storage means, and sends data stored in the storage means to the main control means through the send/receive means, and
• that the switching device comprises switching means, storage means having its own ID code, send/receive means for sending data to and receiving data from the main control means through the signal line, and switching device-side control means for controlling the switching means based on the data from the send/receive means.

A control device for equipment, comprising:

• a signal line distributed to said equipment;
• main control means provided on the equipment;
• a sensor or a switching device connected to the signal line, for sending data to and receiving data from the main control means;
• storage device connected to the signal line;
• and changeover means for enabling an external control device to be connected to the signal line, characterized in
• that the storage unit stores a maintenance history data file containing maintenance history of the equipment and, in the state of the connection of the external control device to the signal line, permits data contained in the maintenance history data file to be read by the external control device and data to be written in the maintenance history data file.