Marathon F200060 manual Communications, Modbus, RTU Framing

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Communications

The Transmitter is capable of digital communications using the Modbus protocol. This is possible by connecting to the half duplex RS-485 terminals using a shielded twisted pair.

Modbus

The MODBUS protocol describes an industrial communications and distributed control system (DCS) that integrates PLCs computers, terminals, and other monitoring, sensing, and control devices. MODBUS is a Master/Slave communications protocol, whereby one device, (the Master), controls all serial activity by selectively polling one or more slave devices. The protocol provides for one master device and up to 247 slave devices on a RS- 485 half duplex twisted pair line. Each device is assigned an address to distinguish it from all other connected devices. All instruments are connected in a daisy-chain configuration.

The instrument communicates with baud rate settings 1200, 2400, 4800, 9600, or 19.2K. The default baud rate is 19.2Kbuad. The default address is 1. Changes to these values can be made by writing to the appropriate memory register.

The Transmitter communicates in Modbus RTU (Remote Terminal Unit) protocol using 8- bit binary data characters. Message characters are transmitted in a continuous stream. The message stream is setup based on the following structure:

Number of bits per character:

 

Start bits

1

Data bits (least significant first)

8

Parity

None only (no bits for no parity)

Stop bits

1

Error Checking

CRC (Cyclical Redundancy Check)

The Transmitter recognizes three RTU commands. These are: read single I registers (command 4), read a single H register (command 3), and preset a single H register (command 6)

In Modbus mode, the Transmitter can be only be configured for the ‘none’ parity option.

The instrument never initiates communications and is always in receive mode unless responding to a query.

RTU Framing

Frame synchronization can be maintained in RTU transmission mode only by simulating a synchronous message. The instrument monitors the elapsed time between receipt of characters. If three and one-half character times elapse without a new character or completion of the frame, then the instrument flushes the frame and assumes that the next

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11/14/2006

Rev. 14

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Contents Marathon Sensors Inc Oxymit Transmitter Operators ManualCopyright Marathon Sensors INC Table of Contents Typical Oxygen Transmitter Calibration F840030 Typical Carbon Transmitter CalibrationF840031 Block Diagram General DescriptionSafety Summary ConnectionsParameter Selections Grounding and ShieldingProcess Parameters Parameter Name Selection Units or Options Range Default Process TypeCarbon Process Factor Dew Point Process FactorOxygen Exponent TC TypeAnalog Output Channels Calibration Process Variable Calculations Percent OxygenPercent Carbon DewpointCommunications ModbusRTU Framing Error Check Field CRC Address FieldFunction Field Data FieldCRC Memory Map LOW Byte Input Event Upper Byte Load LineLOW Byte Cold Junction Trim High Byte Host AddressBits 0 4 Oxygen Exponent Bits 5 6 Display Decimal PlaceBits 8 12 Redox Metal Number LOW BYTE, Analog OutputHEX DEC Block Parameter Description READ/WRITE High BYTE, Analog OutputAOUTRN1 Analog Output 1 Range READ/WRITE AOUTOF2 Analog Output 2 Offset READ/WRITETemp Measured Temperature Read only Spare READ/WRITE TempfilBlock HEX DEC Parameter Description READ/WRITE Mvfil Coldjct Cold Junction Read onlySpare Operational Specifications Percent oxygen 20.9% default800 3000 Address 1 is default Certifications and Compliance PendingImmunity as specified by EN Emissions as specified by EN

F200060 specifications

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One of the standout features of the Marathon F200060 is its powerful motor system. The skateboard is equipped with a dual-motor setup that offers impressive torque and acceleration, allowing riders to reach a top speed of up to 25 miles per hour. This feature makes it suitable for both commuting and leisurely rides, ensuring a thrilling experience on every journey. The motor system is also designed to be energy-efficient, offering extended battery life and reducing the need for frequent recharging.

Speaking of battery life, the Marathon F200060 boasts a high-capacity lithium-ion battery that can provide a range of up to 20 miles on a single charge. This feature is particularly beneficial for urban commuters, enabling them to travel long distances without the anxiety of running out of power. Additionally, the skateboard supports fast charging technology, allowing riders to recharge the battery in a matter of hours.

The construction of the F200060 is another aspect that sets it apart from its competitors. It features a sturdy, lightweight deck made from high-quality materials, providing both durability and stability. The skateboard's design includes high-grade wheels and advanced shock absorption systems that enhance ride comfort, making it effective for both smooth pavements and rough urban terrains.

In terms of safety, the Marathon F200060 is equipped with integrated LED lights that improve visibility during night rides. The skateboard also features advanced braking systems that allow for smooth and controlled stops, ensuring rider safety on all terrains.

Finally, the F200060 comes with smart technology integration, including Bluetooth connectivity that allows riders to connect their smartphones. Users can monitor battery life, customize settings, and even track their riding statistics through a dedicated app. This integration enhances the overall user experience and provides valuable data to help riders optimize their performance.

In summary, the Marathon F200060 electric skateboard embodies a blend of power, efficiency, safety, and smart technology, making it an excellent choice for anyone looking to elevate their ride. Its performance features and innovative design cater to the needs of modern riders, ensuring countless hours of enjoyment on the road.
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