![]() Publication of US20060009897A1 publication Critical patent/US20060009897A1/en Application granted granted Critical Publication of US7313472B2 publication Critical patent/US7313472B2/en Status Active legal-status Critical Current Adjusted expiration legal-status Critical Links Assignors: SCHICK, TROY EUGENE, VOLFSON, BORIS P. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Deere and Co filed Critical Deere and Co Priority to US10/887,039 priority Critical patent/US7313472B2/en Assigned to DEERE & COMPANY reassignment DEERE & COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Deere and Co Priority date (The priority date is an assumption and is not a legal conclusion. ![]() Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Volfson Current Assignee (The listed assignees may be inaccurate. ( en Inventor Troy Eugene Schick Boris P. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires Application number US10/887,039 Other versions US20060009897A1 Google Patents Tractor power hop control system and methodĭownload PDF Info Publication number US7313472B2 US7313472B2 US10/887,039 US88703904A US7313472B2 US 7313472 B2 US7313472 B2 US 7313472B2 US 88703904 A US88703904 A US 88703904A US 7313472 B2 US7313472 B2 US 7313472B2 Authority US United States Prior art keywords pitch fuel bounce engine offset value Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US7313472B2 - Tractor power hop control system and method An example of an AO device is the control valve, PLC could control opening percentage of the control valve with send 4 – 20 mA current which represents 0 – 100% open command.US7313472B2 - Tractor power hop control system and method DAC (Digital to Analog Converter) inside PLC will convert a digital value (12 bit or 16-bit word data resulted from PLC calculation) to current or voltage and send it to a controlled device through the AO channel. AO sends a command to the device in the form of electrical current (4 – 20 mA) or electrical voltage. The temperature sensor will measure temperature and send measurement value to the AI channel in the form of current or voltage.ĪO or analog output is the type of PLC output which used to control analog devices. An example of a sensor is the temperature sensor. ADC (Analog to Digital Converter) inside PLC will convert current or voltage to a digital value in the form of 16 or 12-bit word data to further process. AI receives value from the sensor in the form of electrical current (4-20 ma) or electrical voltage (1-5 V). An example of digital output devices is a relay.ĪI or analog input is the type of PLC input which used to read the value from the sensor. ON command mean PLC DO point send command in form of electrical power (24 VDC, 120 VAC, etc.) and OFF command means PLC DO send no power to devices. Digital output devices only have 2 status, ON or OFF. An example of a Digital input device is a switch.ĭO or discrete/digital output is the type of PLC output which used to control digital output devices. ON state mean PLC DI point received status in form of electrical power (can be 24 VDC, 120 VAC, etc.) and OFF state mean PLC DI point received no power from devices. The Digital input device only has 2 statuses, ON or OFF. Two-Wire Connection with Input CardĭI or discrete/digital input is the type of PLC input which used to read the status of digital input devices. Terminal type/connection, Shield is not shown for simplicity.
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