Device in a system operating with CAN-protocol and in a control and/or supervision system

• US 8,713,301 B2
• Filed: 06/09/2008
• Issued: 04/29/2014
• Est. Priority Date: 02/22/1996
• Status: Expired due to Fees

• Current Assignee: Callahan Cellular LLC (Intellectual Ventures LLC)
• Original Assignee: Xinshu Management LLC (Intellectual Ventures LLC)
• Inventors: Fredriksson, Lars-Berno
• Primary Examiner(s): Abrishamkar, Kaveh
• Application Number:
  US12/135,671
• Publication Number:
  US 20080275996A1
• Time in Patent Office: 2,150 Days
• Field of Search: None
• US Class Current: 713/151
• CPC Class Codes: D03D 51/007 Loom optimisation
• CPC Class Codes: D03J 1/005 Displays or displaying data
• CPC Class Codes: D03J 1/006 Controlling a group of looms
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence

Abstract

A control or supervision system incorporates a digital serial communication and modules which are mutually communicable to this and operate with CAN-protocol. A control desk can be wirelessly connected to one or more modules operating with a signal protocol which takes no account of arbitration and/or confirmation functions appearing in the CAN-system. A particular receiving communication part executes the conversion of said signal protocol to the signal protocol of the CAN-system. A device for controlling a function in a first module in a CAN-system via a wireless connection to a second module in said system. A system of mutually separate units, whereof each unit operates with a CAN-signalling protocol, intercommunicable by means of radiocommunications operating with an identification system in which a key allocation between the units is based upon identities that are assigned by a module in the unit or a master system.

Claims

1. A system comprising:

a transceiver configured to;

connect to at least one of a plurality of CAN network modules, and

receive a CAN message,

the transceiver comprising a processor configured to convert the received CAN message to a non-CAN message by removing stuff bits in a data field and removing a CAN-related bit in a trailer of the received CAN message; and

a monitoring and control unit comprising;

a monitoring and control transceiver configured to communicate the CAN message via the transceiver, and

a monitoring and control processor configured to generate the CAN message.

2. The system of claim 1, wherein the transceiver processor is further configured to convert a received non-CAN network message into a second CAN message.

3. The system of claim 1, wherein the transceiver processor is further configured to remove an acknowledge (ACK) bit and CRC bits in a trailer of the received CAN message for transmission via the transceiver.

4. The system of claim 1, further comprising a plurality of devices configured to communicate with individual ones of the plurality of CAN network modules, wherein the plurality of CAN network modules are configured to control one of a plurality of devices in accordance with the received CAN message.

5. The system of claim 1, wherein the monitoring and control unit is configured to control at least one device associated with at least one of the plurality of CAN network modules via the received CAN message.

6. A non-transitory computer-readable medium having instructions stored thereon that, if executed by a computing device, cause the computing device to perform operations comprising:

receiving a CAN frame from a first CAN network;

removing stuff bits in a data field of the received CAN frame and removing an acknowledgement bit in a CAN frame trailer portion of the received CAN frame to create a first non-CAN frame;

transmitting the first non-CAN frame to a receiver in communication with a second CAN network;

receiving a second non-CAN frame comprising portions of the CAN frame, wherein the second non-CAN frame is received from a transmitter connected to the second CAN network;

inserting the stuff bits in a data field of the second non-CAN frame and the acknowledgement bit in a CAN frame field of the second non-CAN frame to create a restored CAN frame; and

transmitting the restored CAN frame to at least one device via a CAN segment.

7. The non-transitory computer-readable medium of claim 6, wherein the removing comprises:

storing, in a buffer, the received CAN frame; and

reading out only a portion of the stored CAN frame to create a packet for transmission.

8. The non-transitory computer-readable medium of claim 6, wherein at least one of the first or second non-CAN frames are transmitted as part of a connection portion and an acknowledgement portion of a transmission.

9. The non-transitory computer-readable medium of claim 6, wherein the transmitting the first non-CAN frame comprises wirelessly transmitting the first non-CAN frame to the receiver in communication with the second CAN network.

10. A method comprising:

receiving a CAN message, at a first transceiver, from a monitoring and control unit,

wherein the first transceiver and the monitoring and control unit are on a first CAN network, and

wherein the received CAN message is intended for at least one CAN module on a second CAN network;

removing stuff bits in a data field of the received CAN message and a CAN-related bit in a trailer of the received CAN message to convert the received CAN message to a non-CAN message; and

transmitting, from the first transceiver, the non-CAN message to a second transceiver located on the second CAN network.

11. The method of claim 10, wherein the monitoring and control unit is configured to control at least one device associated with the at least one CAN module on the second CAN network via the received CAN message.

12. The method of claim 10, further comprising:

receiving at the first transceiver a second non-CAN message from the second transceiver located on the second CAN network via the non-CAN network;

converting the second non-CAN message to a second CAN message by inserting stuff bits in a data field of the second non-CAN message and inserting a CAN-related bit in a trailer of the second non-CAN message; and

transmitting the second CAN message on the first CAN network.

13. The method of claim 10, further comprising:

removing, at the first transceiver, an acknowledge (ACK) bit and CRC bits in the trailer of the received CAN message prior to transmitting the non-CAN message.

14. A method comprising:

receiving a CAN frame from a first CAN network;

removing stuff bits in a data field of the received CAN frame and removing an acknowledgement bit in a CAN frame trailer portion of the received CAN frame to create a non-CAN frame;

transmitting the non-CAN frame to a receiver in communication with a second CAN network;

receiving a second non-CAN frame comprising portions of the received CAN frame, wherein the second non-CAN frame is received from a transmitter connected to the second CAN network;

inserting stuff bits in a data field of the second non-CAN frame and an acknowledgement bit in a CAN frame field of the second non-CAN frame to create a restored CAN frame; and

transmitting the restored CAN frame to at least one device via a CAN segment.

15. An apparatus comprising:

a CAN unit comprising;

a CAN network interface configured to communicate with a first CAN network;

a CAN unit communication adjuster configured to communicate with a transceiver unit,

wherein the transceiver unit is configured to communicate with at least one other transceiver unit via a non-CAN network, and

wherein the at least one other transceiver unit is on at least one other CAN network, the transceiver unit further configured to transmit a first non-CAN frame to the at least one other transceiver unit and receive a second non-CAN frame from the at least one other transceiver unit; and

a CAN unit processor configured to;

receive a first CAN frame from the CAN network interface,

remove stuff bits in a data field of the received first CAN frame and remove an acknowledgement bit in a CAN frame trailer portion of the received first CAN frame to create the first non-CAN frame,

communicate the first non-CAN frame to the transceiver unit via the CAN unit communication adjuster,

receive the second non-CAN frame from the transceiver via the CAN unit communication adjuster,

insert stuff bits in a data field of the second non-CAN frame and an acknowledgement bit in a CAN frame field of the second non-CAN frame to create a second CAN frame, and

transmit the second CAN frame on the first CAN network via the CAN network interface.

16. An apparatus comprising:

a transceiver comprising a transceiver unit communication adjuster configured to communicate with a CAN unit, wherein the CAN unit is configured to communicate with a first CAN network and to remove stuff bits in a data field of a received CAN frame and remove an acknowledgement bit in a CAN frame trailer portion of the received CAN frame to create a first non-CAN frame;

a transceiver unit transmission interface configured to communicate with at least one other transceiver unit on at least one other CAN network via a non-CAN network;

a transceiver unit processor configured to;

receive the first non-CAN frame from the CAN unit via the transceiver unit communication adjuster,

transmit the first non-CAN frame via the transceiver unit transmission interface to the at least one other transceiver unit,

receive a second non-CAN frame via the transceiver unit transmission interface from the at least one other transceiver unit, and

communicate the second non-CAN frame to the CAN unit via the transceiver unit communication adjuster.

17. The apparatus of claim 16, wherein the processor is further configured to at least one of:

transmit the first non-CAN frame, or

receive the second non-CAN frame, as part of a connection portion and an acknowledgement portion of the transmission via the non-CAN network.

18. The apparatus of claim 16, wherein the transceiver unit transmission interface is configured to transmit the first non-CAN frame wirelessly to the at least one other transceiver unit.