GE Understanding MM300 Dust Collector Communication Protocols
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RS485 INTERFACE (MODBUS RTU)

COMMUNICATIONS GUIDE

AL: low order byte of A

AH: high order byte of A

CRC: 16 bit CRC-16 value

i, j: loop counters

(+): logical exclusive or operator

Di: i-th data byte (i = 0 to N-1)

G:16 bit characteristic polynomial = 1010000000000001 with MSbit dropped and bit order reversed

shr(x): shift right (the LSbit of the low order byte of x shifts into a carry flag, a '0' is shifted into the MSbit of the high order byte of x, all other bits shift right one location

The algorithm is:

1.FFFF hex —> A

2.0 —> i

3.0 —> j

4.Di (+) AL —> AL

5.j+1 —> j

6.shr(A)

7.is there a carry? No: go to 8. Yes: G (+) A —> A

8.is j = 8? No: go to 5. Yes: go to 9.

9.i+1 —> i

10.is i = N? No: go to 3. Yes: go to 11.

11.A —> CRC

Timing

Data packet synchronization is maintained by timing constraints. The receiving device must measure the time between the reception of characters. If 3.5 character times elapse without a new character or completion of the packet, then the communication link must be reset (i.e. all slaves start listening for a new transmission from the master). Thus at 9600 baud a delay of greater than 3.5 x 1 / 9600 x 10 x = x 3.65 x ms will cause the communication link to be reset.

MM300 supported functions

The following functions are supported by the MM300:

•FUNCTION CODE 03 - Read Setpoints and Actual Values

•FUNCTION CODE 04 - Read Setpoints and Actual Values

•FUNCTION CODE 05 - Execute Operation

•FUNCTION CODE 06 - Store Single Setpoint

•FUNCTION CODE 07 - Read Device Status

•FUNCTION CODE 08 - Loopback Test

•FUNCTION CODE 10 - Store Multiple Setpoints

Modbus Functions

Function Code 03H

Modbus implementation: Read Holding Registers

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MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE

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Contents MM300 Page Table of Contents MM300 Motor Management System Communications Guide MM300 Motor Management System Communications Guide Data Packet Format Electrical InterfaceData Frame Format and Data Rate Error Checking CRC-16 AlgorithmFunction Code 03H TimingMM300 supported functions Function Code 04H Master/slave packet format for function code 03HMaster Transmission Bytes Example Description Slave Response Bytes Example DescriptionMaster/slave packet format for function code 05H Function Code 05HMaster/slave packet format for function code 04H Function Code 06H Master/slave packet format for function code 06HData CRC CB B9Master/slave packet format for function code 07H Function Code 07HFunction code 7 bitmask Function Code 08H Function Code 10HMaster/slave packet format for function code 08H Diag CodeError Responses Master/slave packet format for function code 10HModbus memory map Actual ValuesTrip Counters General TimersREAL-TIME Clock CONTACT/VIRTUAL INPUTS/OUTPUTS Status SecurityStatus Motor Current MeteringPower Metering FLA RTD Maximium Temperature Motor Starting Learned DataGCP Factory Test User MAP ValuesEvent Recorder Status BufferSetpoints Commands Communication SettingsFlexlogic CommunicationREAL-TIME CLOCK/DAYLIGHT Savings Current SensingProcess Interlock Motor Data SetupVoltage Sensing RS485 Interface Modbus RTU User MAP Addresses Communication SetupOpen Control Circuit Reset Setup Mechanical JAMRTD OPEN/SHORT Circuit REQUIRED=IOG Thermistor CPUUnderpower IOA + IOC or IOA + IOB Ground FaultUndercurrent REQUIRED=IOA FLAPhase Undervoltage REQUIRED=IOB Phase Overvoltage REQUIRED=IOBPhase Reversal REQUIRED=IOB Load IncreaseMaintenance Flexlogic TimersStart Inhibit Restart BlockCommunications Guide RS485 Interface Modbus RTU Communications Guide RS485 Interface Modbus RTU Contact Input Assignment Contact Outputs Auto / Manual ControlFlexlogic Equation Unsigned Value Unsigned VALUE, 1 Decimal PlaceUnsigned VALUE, 2 Decimal Places Unsigned Long ValueUnsigned Long VALUE, 3 Decimal Places Date MM/DD/YYYYMSB LSBOFF OFF / noOn / YES USER3 USER1USER2 No Event/Trip To Date RS485 Interface Modbus RTU RS485 Interface Modbus RTU Not XOR Latch NOR Nand Timer Assign RS485 Interface Modbus RTU Definition RS485 Interface Modbus RTU SUN MONTUE WEDVbn Direct Bit FC180 FC181 FC182 FC183 RS485 Interface Modbus RTU Performing Commands Using Function Code 10H CRC 7E CE Using the User Definable Memory MapMaster/slave packet format for performing commands RS485 Interface Modbus RTU Ethernet interface Profibus Output Data Fieldbus interface external connections ProfibusProfibus LED indications LEDProfibus DP-Diagnostics System Standard Diagnostics Bytes 1 throughProfibus Input Data F1BCommunications Guide Fieldbus Interface DeviceNet Communications Fieldbus interface external connections DeviceNetDeviceNet LED indications Class ObjectDeviceNet Object Class Code 03H Identity Object Class Code 01HMessage Router Class Code 02H Connection Object, Class Code 05h, Services Attribute Access Name Data Type Value DescriptionDeviceNet Connection Object Class Code 05H Identity Object, Class Code 03h, Instance 01h, AttributesMotor Data Object, Class Code A0h, Attributes Motor Data Object, Class Code A0h, ServicesDeviceNet Motor Data Poll, Explicit Object Class Code A0H Item Description Size in Bytes Format 0FH Explicit Motor Analog Data Object, Class Code B0h, ServicesAttribute Description Size in Bytes Data Formats, Explicit Motor Analog Data Object Attribute Item Description Size Format BytesFieldbus Interface Explicit Motor Control Object, Class Code B1h, Services DeviceNet Explicit Motor Object, Class Code B1HExplicit Motor Control Object, Class Code B1h, Attributes Data Value, Class B1hFieldbus Interface

MM300 specifications

The GE MM300 is a robust and versatile controller designed primarily for industrial automation applications. Built to tackle the demands of modern manufacturing environments, this controller offers a range of features that contribute to its popularity among engineers and operators.

One of the standout features of the GE MM300 is its scalability. The device can be easily configured to meet the needs of both small and large systems. Its modular architecture allows users to add or remove components based on the specific requirements of their applications, facilitating a more tailored approach to automation.

The MM300 supports various communication protocols, including Ethernet/IP, Modbus TCP, and more, ensuring seamless integration with a variety of devices and systems. This feature significantly enhances interoperability, allowing users to connect the controller to existing infrastructure without extensive reconfiguration.

In terms of processing power, the MM300 is equipped with a high-performance processor that can handle complex tasks with ease. With advanced data handling capabilities, it supports real-time data processing, enabling faster decision-making and improving overall operational efficiency. This capability is particularly beneficial for applications requiring precise control and monitoring.

Moreover, the GE MM300 boasts a user-friendly interface, featuring an intuitive programming environment that simplifies the development of control applications. This includes an integrated development environment (IDE) and support for popular programming languages, making it accessible for both seasoned programmers and those new to automation technologies.

The device is designed to operate in challenging industrial conditions, featuring a rugged construction that ensures durability and longevity. Its ability to withstand extreme temperatures, vibrations, and other environmental stressors enhances its reliability in demanding applications, which is crucial for minimizing downtime in production processes.

Security is another critical aspect of the GE MM300. The controller incorporates advanced security features to protect against unauthorized access and cyber threats, helping organizations ensure the integrity of their operations.

In summary, the GE MM300 stands out due to its scalability, versatile communication options, high processing capabilities, user-friendly programming environment, rugged design, and security features. These characteristics make it a reliable choice for industries seeking to enhance their automation processes and improve overall efficiency. Whether for small-scale or large-scale applications, the MM300 provides a comprehensive solution to meet the evolving needs of modern manufacturing.
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