Patent ID: 11945688
Assignee: MITSUBISHI ELECTRIC BUILDING SOLUTIONS CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. An elevator monitoring system comprising a remote monitoring server that remotely monitors an elevator, and an elevator control device that is connected with the remote monitoring server via a communication network,
wherein the elevator control device includes:
a processor that performs a monitoring control process for the elevator; and
a memory that stores a communication function in which a control program for communicating with the remote monitoring server for the elevator is stored, a remote monitoring function in which a control program for the monitoring control process is stored, and a maintenance terminal function in which a control program for connection with a maintenance terminal is stored,
the remote monitoring function is encrypted and is stored in the memory,
the remote monitoring server is configured to transmit a decryption key of the remote monitoring function to the elevator control device in response to a request for the decryption key transmitted from the elevator control device, and
the processor is configured to:
receive the decryption key from the remote monitoring server by using the communication function;
decrypt the remote monitoring function by using the decryption key; and
execute the monitoring control process,
wherein:
the remote monitoring server is configured to transmit an encryption key for again encrypting the decrypted remote monitoring function to the elevator control device in response to the request for the decryption key, and
the processor is configured to:
receive the encryption key from the remote monitoring server by using the communication function; and
store the encryption key in the memory,
wherein:
in response to an encrypting condition that is in advance defined is satisfied, the processor is configured to:
encrypt the remote monitoring function by using the encryption key; and
delete the encryption key, and
wherein the encrypting condition is a condition that is satisfied where a continuous time that elapses without a response from the remote monitoring server being received reaches a designated time that is in advance designated.