Motor control system, motor control device, and non-transitory recording medium

• US 10,520,906 B2
• Filed: 11/30/2016
• Issued: 12/31/2019
• Est. Priority Date: 03/14/2016
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Tamashima, Daisuke, Sato, Fumiaki, Ushiyama, Takao, Hashimoto, Naoya
• Primary Examiner(s): Dhakal, Bickey
• Assistant Examiner(s): Imtiaz, Zoheb S
• Application Number:
  US15/752,253
• Publication Number:
  US 20190025783A1
• Time in Patent Office: 1,126 Days
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 19/0423 Input/output
• CPC Class Codes: G05B 19/05 Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
• CPC Class Codes: G05B 19/414 Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
• CPC Class Codes: G05B 2219/25368 Start group of motors, machines in sequence, power up, down sequence
• CPC Class Codes: G05B 2219/34208 Motion controller
• CPC Class Codes: G05B 2219/42186 Master slave, motion proportional to axis
• CPC Class Codes: H02P 5/46 for speed regulation of two or more dynamo-electric motors in relation to one another

Abstract

The disclosure enables mutual relationships among operation statuses of each motor to be ascertained without using synchronous serial communication between multiple motor control devices. The motor control system is equipped with: a motor driver having a trigger determination part for determining whether or not a trigger condition is satisfied, a trigger notification part for transmitting a trigger notification indicating that the trigger condition is satisfied to motor drivers by asynchronous communication, and a trace result information generation part for causing a storage part to store a trigger data number for identifying operation data when the trigger condition is satisfied; and motor drivers each having a trace result information generation part for causing a storage part to store a slave trigger time at which the trigger notification is received, a trigger data number for identifying operation data corresponding to the slave trigger time, and a master trigger time.

Claims

1. A motor control system comprising:

a plurality of motors; and

motor control devices that are connected to the motors respectively and control the motors at a predetermined control cycle,

wherein one of the motor control devices is a master device while other motor control devices are slave devices,

the master device includes;

a first storage device that stores operation data of the motor connected to the master device at a first predetermined time interval;

a trigger determination part that determines whether or not the operation data satisfies a predetermined trigger condition;

a trigger notification part that transmits a trigger notification that includes a master trigger time that is a time at which the trigger condition is satisfied to the slave devices by asynchronous communication when the trigger determination part determines that the trigger condition is satisfied; and

a first result information generation part that causes the first storage device to store first specification information for specifying the operation data when the trigger condition is satisfied, and

each of the slave devices includes;

a second storage device that stores operation data of the motors connected to the slave devices at a second predetermined time interval; and

a second result information generation part that causes the second storage device to store second specification information for specifying the operation data when the trigger notification is received, a slave trigger time that is a time at which the trigger notification is received, and the master trigger time that is included in the trigger notification when the trigger notification is received from the trigger notification part.

2. The motor control system according to claim 1, comprising:

an information processing device,

wherein the first result information generation part reads the operation data in a predetermined period of time that is set with reference to the master trigger time from the first storage device based on the master trigger time and the first predetermined time interval and outputs a first operation data group that is the operation data in the predetermined period of time, which has been read, and the first specification information to the information processing device,

the second result information generation part reads the operation data in the predetermined period of time that is set with reference to the master trigger time from the second storage device based on the slave trigger time, the master trigger time, and the second predetermined time interval and outputs a second operation data group that is the operation data in the predetermined period of time, which has been read, the second specification information, and the slave trigger time to the information processing device, and

the first result information generation part or the second result information generation part outputs the master trigger time to the information processing device.

3. The motor control system according to claim 2, wherein the information processing device specifies the operation data corresponding to the master trigger time in the second operation data group based on a time difference between the slave trigger time and the master trigger time, the second predetermined time interval, and the second specification information and outputs a graph of the first operation data group and the second operation data group such that the operation data that has been specified and the operation data specified by the first specification information are presented in the same time axis coordinates.

4. A motor control device that is provided in the motor control system according to claim 1, wherein the motor control device is the master device.

5. A non-transitory recording medium recording a motor control program that causes a computer to function as the motor control device according to claim 4, wherein the motor control program causes the computer to function as each part of the motor control device.

6. A motor control device that is provided in the motor control system according to claim 1, wherein the motor control device is the slave device.

7. A non-transitory recording medium recording a motor control program that causes a computer to function as the motor control device according to claim 6, wherein the motor control program causes the computer to function as each part of the motor control device.

8. A motor control system comprising:

a plurality of motors; and

motor control devices that are connected to the motors respectively and control the motors at a predetermined control cycle,

wherein one of the motor control devices is a master device while other motor control devices are slave devices,

the master device includes;

a first storage device that stores operation data of the motor connected to the master device;

a trigger determination part that determines whether or not a predetermined trigger condition is satisfied;

a trigger notification part that transmits a trigger notification indicating that the trigger condition is satisfied to the slave devices by asynchronous communication when the trigger determination part determines that the trigger condition is satisfied; and

a first result information generation part that causes the first storage device to store first specification information for specifying the operation data when the trigger condition is satisfied and a master trigger time that is a time at which the trigger condition is satisfied, and

each of the slave devices includes;

a second storage device that stores operation data of the motors connected to the slave devices; and

a second result information generation part that causes the second storage device to store second specification information for specifying the operation data when the trigger notification is received and a slave trigger time that is a time at which the trigger notification is received when the trigger notification is received from the trigger notification part.

9. A motor control device that is provided in the motor control system according to claim 8, wherein the motor control device is the master device.

10. A non-transitory recording medium recording a motor control program that causes a computer to function as the motor control device according to claim 9, wherein the motor control program causes the computer to function as each part of the motor control device.

11. A motor control device that is provided in the motor control system according to claim 8, wherein the motor control device is the slave device.

12. A non-transitory recording medium recording a motor control program that causes a computer to function as the motor control device according to claim 11, wherein the motor control program causes the computer to function as each part of the motor control device.