CONTROL DEVICE AND CONTROL SYSTEM FOR CONVERTER

• US 20150039103A1
• Filed: 07/30/2014
• Published: 02/05/2015
• Est. Priority Date: 08/02/2013
• Status: Active Application

• Current Assignee: Rockwell Automation Control Solutions (Harbin) Co., Ltd. (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Control Solutions (Harbin) Co., Ltd. (Rockwell Automation, Inc.)
• Inventors: Liu, Changjiang, Wu, Zhuoli, Chi, Huiguang, Shi, Yanshuang
• Application Number:
  US14/447,291
• Publication Number:
  US 20150039103A1
• Time in Patent Office: Days
• US Class Current: 700/83
• CPC Class Codes: G05B 19/054 Input/output
• CPC Class Codes: G05B 2219/13031 Use of touch screen
• CPC Class Codes: G05B 2219/23044 Transparent overlay with touch sensors, put over display panel, select function
• CPC Class Codes: G05B 2219/23197 Curve entered with pen on touchscreen
• CPC Class Codes: G05B 2219/23377 Touch screen, with representation of buttons, machine on screen
• CPC Class Codes: G05B 2219/25204 Translate between different communication protocols
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers

Abstract

The present disclosure relates to a control device and a control system for a converter. The control device according to the present disclosure includes: a touchscreen adapted to provide a human-machine interface; a communication adapter plate connected to the touchscreen, the touchscreen communicating with the communication adapter plate using a first communication protocol; and a PLC control device adapted to control the converter, the PLC being connected to the communication adapter plate and communicating with the communication adapter plate using a second communication protocol that is different from the first communication protocol. The control device and the control system for a converter according to the present disclosure may incorporate both the touchscreen and PLC, achieve an excellent closed-loop control capability, and thus meet user requirements.

Claims

1. A control device for a converter, comprising:

a touchscreen adapted to provide a human-machine interface;

a communication adapter plate connected to the touchscreen, the touchscreen communicating with the communication adapter plate using a first communication protocol; and

a PLC control device adapted to control the converter, the PLC control device being connected to the communication adapter plate and communicating with the communication adapter plate using a second communication protocol that is different from the first communication protocol.

2. The control device according to claim 1, wherein the communication adapter plate comprises:

a first interface adapted to receive a first signal from the touchscreen or transmit the first signal to the touchscreen using the first communication protocol;

a second interface adapted to receive a second signal from the PLC control device or transmit the second signal to the PLC control device using the second communication protocol; and

a conversion unit adapted to convert the first signal into the second signal, or convert the second signal into the first signal.

3. The control device according to claim 1, wherein the PLC control device comprises:

a PLC unit connected to the communication adapter plate and adapted to communicate with the communication adapter plate using the second communication protocol and to perform external control on the converter; and

a control box connected to the communication adapter plate and adapted to perform internal control on the converter.

4. The control device according to claim 3, wherein the PLC unit is further adapted to receive a sensing signal from an external sensor.

5. The control device according to claim 3, wherein the communication adapter plate comprises:

a first interface adapted to receive a first signal from the touchscreen or transmit the first signal to the touchscreen using the first communication protocol;

a second interface adapted to receive a second signal from the PLC unit or transmit the second signal to the PLC unit using the second communication protocol;

a conversion unit adapted to convert the first signal into the second signal, or convert the second signal into the first signal; and

a third interface adapted to selectively transmit the conversion result by the conversion unit to the control box.

6. The control device according to claim 5, wherein the third interface is an optical fiber interface.

7. The control device according to claim 1, wherein the first communication protocol is MODBUS, and the second communication protocol is PPI.

8. The control device according to claim 1, wherein the converter is a high-voltage converter.

9. A control system, comprising:

a converter;

a control device for controlling the converter, the control device comprising;

a touchscreen adapted to provide a human-machine interface;

a communication adapter plate connected to the touchscreen, the touchscreen communicating with the communication adapter plate using a first communication protocol; and

a PLC control device adapted to control the converter, the PLC control device being connected to the communication adapter plate and communicating with the communication adapter plate using a second communication protocol that is different from the first communication protocol;

an actuating mechanism that is controlled by the converter to actuate control of a controlled object; and

a sensor adapted to sense the controlled object and transmit a resulting sensing signal to the PLC control device in the control device.

10. The control system according to claim 9, wherein the communication adapter plate comprises:

a first interface adapted to receive a first signal from the touchscreen or transmit the first signal to the touchscreen using the first communication protocol;

a second interface adapted to receive a second signal from the PLC control device or transmit the second signal to the PLC control device using the second communication protocol; and

a conversion unit adapted to convert the first signal into the second signal, or convert the second signal into the first signal.

11. The control system according to claim 9, wherein the PLC control device comprises:

a PLC unit connected to the communication adapter plate and adapted to communicate with the communication adapter plate using the second communication protocol and to perform external control on the converter; and

a control box connected to the communication adapter plate and adapted to perform internal control on the converter.

12. The control system according to claim 11, wherein the PLC unit is further adapted to receive a sensing signal from an external sensor.

13. The control system according to claim 11, wherein the communication adapter plate comprises:

a first interface adapted to receive a first signal from the touchscreen or transmit the first signal to the touchscreen using the first communication protocol;

a second interface adapted to receive a second signal from the PLC unit or transmit the second signal to the PLC unit using the second communication protocol;

a conversion unit adapted to convert the first signal into the second signal, or convert the second signal into the first signal; and

a third interface adapted to selectively transmit the conversion result by the conversion unit to the control box.

14. The control system according to claim 13, wherein the third interface is an optical fiber interface.

15. The control system according to claim 9, wherein the first communication protocol is MODBUS, and the second communication protocol is PPI.

16. The control system according to claim 9, wherein the converter is a high-voltage converter.

17. The control system according to claim 9, wherein the control system is a constant-pressure water supply system or a constant-pressure air supply system.