Remote Access Of An Elevator Control System With Multiple Subsystems

• US 20120175196A1
• Filed: 09/16/2009
• Published: 07/12/2012
• Est. Priority Date: 09/16/2009
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Hughes, David M., Mahoney, Sally Day, Sakonchick, Donald M.
• Granted Patent: US 9,108,824 B2
• Time in Patent Office: Days
• US Class Current: 187/393
• CPC Class Codes: B66B 1/34 Details , e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
• CPC Class Codes: B66B 1/3415 Control system configuration and the data transmission or communication within the control system
• CPC Class Codes: B66B 1/3438 Master-slave control system configuration
• CPC Class Codes: B66B 1/3461 between the elevator control system and remote or mobile stations
• CPC Class Codes: B66B 5/0025 for maintenance or repair

Abstract

A method and system for remote access to multiple subsystems (102) of an elevator control system (104) are provided. The method includes receiving a request to establish a remote connection at an elevator control subsystem (112) from a remote user system (110). The method also includes determining whether a local connection is established between the elevator control subsystem (112) and service equipment (120). The method further includes establishing the remote connection in response to determining that the local connection is not established between the elevator control subsystem (112) and the service equipment (120). The method additionally includes sending a time since the service equipment (120) was last active and providing an option to complete the remote connection in response to determining that the local connection is established, the elevator control subsystem (112) is operating in a first mode of operation, and a configurable local activity timeout period has not expired.

Claims

1. A method for providing remote access to multiple subsystems (102) of an elevator control system (104) comprising:

receiving a request to establish a remote connection at an elevator control subsystem (112) from a remote user system (110) via a communication unit (106) connected to the elevator control subsystem (112) of the multiple subsystems (102);

determining whether a local connection is established between the elevator control subsystem (112) and service equipment (120);

establishing the remote connection in response to determining that the local connection is not established between the elevator control subsystem (112) and the service equipment (120); and

sending a time since the service equipment (120) was last active on the local connection and providing an option to complete the remote connection in response to determining that the local connection is established between the elevator control subsystem (112) and the service equipment (120), the elevator control subsystem (112) is operating in a first mode of operation, and a configurable local activity timeout period for communication between the elevator control subsystem (112) and the service equipment (120) has not expired.

2. The method of claim 1 further comprising:

rejecting the remote connection in response to determining that the local connection is established between the elevator control subsystem (112) and the service equipment (120), and the elevator control subsystem (112) is operating in a second mode of operation.

3. The method of claim 1 further comprising:

providing the remote user system (110) with remote access functions via the remote connection to monitor activity of the elevator control subsystem (112), interrogate the elevator control subsystem (112) for specific data, customize elevator operation, and download data for analysis in response to establishing the remote connection.

4. The method of claim 1 further comprising:

receiving a request at the elevator control subsystem (112) to remotely access a secondary elevator control subsystem (114, 116, 118) of the multiple subsystems (102);

determining whether a secondary local connection is established between the secondary elevator control subsystem (114, 116, 118) and the service equipment (120);

configuring the elevator control subsystem (112) to act as a communication pass-thru device between the remote user system (110) and the secondary elevator control subsystem (114, 116, 118) in response to determining that the secondary local connection is not established; and

sending a time since the service equipment (120) was last active on the secondary local connection and providing an option to complete a pass-thru remote connection in response to determining that the secondary local connection is established, the elevator control subsystem (112) is operating in the first mode of operation, and a configurable secondary local activity timeout period for communication between the secondary elevator control subsystem (114, 116, 118) and the service equipment (120) has not expired.

5. The method of claim 4 further comprising:

rejecting the request in response to determining that the secondary local connection is established, and the elevator control subsystem (112) is operating in a second mode of operation.

6. The method of claim 4 wherein the secondary elevator control subsystem (114, 116, 118) is a parent subsystem and the elevator control subsystem (112) is a child subsystem in a control hierarchy of the elevator control system (104).

7. The method of claim 4 further comprising:

providing the remote user system (110) with remote access functions via the remote connection and the elevator control subsystem (112) to monitor activity of the secondary elevator control subsystem (114, 116, 118), interrogate the secondary elevator control subsystem (114, 116, 118) for specific data, customize elevator operation, and download data for analysis.

8. The method of claim 1 further comprising:

monitoring activity on the remote connection in response to establishing the remote connection; and

closing the remote connection in response to inactivity on the remote connection for a configurable remote activity timeout period.

9. The method of claim 1 further comprising:

monitoring for a local connection attempt in response to establishing the remote connection;

preventing the local connection attempt from establishing the local connection in response to determining that the remote connection is established, and a configurable remote activity timeout period has not expired; and

sending a local connection attempt warning message to the remote user system (110) in response to detecting the local connection attempt.

10. A system for providing remote access to multiple subsystems (102) of an elevator control system (104), comprising:

an elevator control subsystem (112) of the multiple subsystems (102) configurable to communicate with a remote user system (110) via a communication unit (106), the elevator control subsystem (112) comprising;

a service interface (312) configurable to communicate with service equipment (120);

an external communication interface (316) configurable to communicate with the communication unit (106);

a communication timer (318); and

a processing circuit (302) to execute remote access logic (320), the remote access logic (320) comprising a method of;

receiving a request to establish a remote connection at the elevator control subsystem (112) from the remote user system (110) via the external communication interface (316);

determining whether a local connection is established between the elevator control subsystem (112) and service equipment (120) via the service interface (312);

establishing the remote connection in response to determining that the local connection is not established between the elevator control subsystem (112) and the service equipment (120); and

sending a time since the service equipment (120) was last active on the local connection and providing an option to complete the remote connection in response to determining that the local connection is established between the elevator control subsystem (112) and the service equipment (120), the elevator control subsystem (112) is operating in a first mode of operation, and a configurable local activity timeout period for communication between the elevator control subsystem (112) and the service equipment (120) has not expired as monitored using the communication timer (318).

11. The system of claim 10 wherein the remote access logic (320) further comprises a method of:

rejecting the remote connection in response to determining that the local connection is established between the elevator control subsystem (112) and the service equipment (120), and the elevator control subsystem (112) is operating in a second mode of operation.

12. The system of claim 10 wherein the remote access logic (320) further comprises a method of:

providing the remote user system (110) with remote access functions via the remote connection to monitor activity of the elevator control subsystem (112), interrogate the elevator control subsystem (112) for specific data, customize elevator operation, and download data for analysis in response to establishing the remote connection.

13. The system of claim 10 wherein the multiple subsystems (102) further comprise a secondary elevator control subsystem (114, 116, 118), the elevator control subsystem (112) further comprises subsystem communication interfaces (314) to communicate with the secondary elevator control subsystem (114, 116, 118), and the remote access logic (320) further comprises a method of:

receiving a request at the elevator control subsystem (112) to remotely access the secondary elevator control subsystem (114, 116, 118);

determining whether a secondary local connection is established between the secondary elevator control subsystem (114, 116, 118) and the service equipment (120);

configuring the elevator control subsystem (112) to act as a communication pass-thru device between the remote user system (110) and the secondary elevator control subsystem (114, 116, 118) in response to determining that the secondary local connection is not established; and

sending a time since the service equipment (120) was last active on the secondary local connection and providing an option to complete a pass-thru remote connection in response to determining that the secondary local connection is established, the elevator control subsystem (112) is operating in the first mode of operation, and a configurable secondary local activity timeout period for communication between the secondary elevator control subsystem (114, 116, 118) and the service equipment (120) has not expired.

14. The system of claim 13 wherein the remote access logic (320) further comprises a method of:

rejecting the request in response to determining that the secondary local connection is established, and the elevator control subsystem (112) is operating in a second mode of operation.

15. The system of claim 13 wherein the secondary elevator control subsystem (114, 116, 118) is a parent subsystem and the elevator control subsystem (112) is a child subsystem in a control hierarchy of the elevator control system (104).

16. The system of claim 10 wherein the remote access logic (320) further comprises a method of:

monitoring activity on the remote connection in response to establishing the remote connection; and

closing the remote connection in response to inactivity on the remote connection for a configurable remote activity timeout period.

17. The system of claim 10 wherein the remote access logic (320) further comprises a method of:

monitoring for a local connection attempt on the service interface (312) in response to establishing the remote connection; and

sending a local connection attempt warning message to the remote user system (110) in response to detecting the local connection attempt.

18. The system of claim 10 further comprising multiple elevator control systems (104), wherein the multiple elevator control systems (104) share communication with the communication unit (106).