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Series VS1 Modbus RTU Protocol 9/07 MN744

6 Modbus RTU MN744Table 4 Coil Table ContinuedModbus Ref CoilsClass Location Description (When Set)00066 VIS Control Command Bit 1 FAULT RESET - 0 w

Modbus RTU 7MN744Control ModesDigital inputs used in all control modes supported in H2 drives are described in Table 5. Pre-Conditions: Before a H2 dr

8 Modbus RTU MN744Table 6 Control Modes Description ContinuedControl Mode Action Control Sources/CommandsSPEED MODESpeed control mode is similarto B

Modbus RTU 9MN744Table 6 Control Modes Description ContinuedControl Mode Action Control Sources/CommandsPOSITION CMD EXTERNALMODEPositioning mode us

10 Modbus RTU MN744Table 6 Control Modes Description ContinuedControl Mode Action Control Sources/CommandsPROCESS VELOCITY MODEProcess velocity cont

Modbus RTU 11MN744Discrete Inputs (Modbus 1xxxx Reference Set)Discrete Inputs in the H2 represent read only status bit for the drive.Read Discrete I

12 Modbus RTU MN744Table 7 Discrete Inputs Table ContinuedModbus Ref Discrete InputsLocation Description10011 Drive Status1 Bit 10 Speed Mode - acti

Modbus RTU 13MN744Inputs (Modbus 3xxxx Reference Set)Analog inputs are mapped to Modbus Inputs for H2.Read Input Registers (Function Code 04)This

14 Modbus RTU MN744Holding Registers (Modbus 4xxxx Reference Set)Holding registers are the primary mechanism by which a master gains access to key co

Modbus RTU 15MN744Example of a request to write two registers starting at 2 to 00 0A and 01 02 hex:Request ResponseField Name (Hex) Field Name (Hex)Fu

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16 Modbus RTU MN744Table 9 Holding Register Table ContinuedModbusRefHolding RegistersName Class Type Data Description4003140032Jog Control SpeedHzVI

Modbus RTU 17MN744Text Handling (H2 Function Code 66)These sub-functions are used to support text-handling functions.Read Parameter Name Text (Sub-

18 Modbus RTU MN744Text Handling ContinuedRead List Parameter Text (Sub-Code 4)This PDU is used to read fault code text.Request PDUByte 1Byte 2 Byte

Modbus RTU 19MN744Text Handling ContinuedRead Parameter Block Text (Sub-Code 7)This PDU is used to reads a parameter's block name from the con

20 Modbus RTU MN744Text Handling ContinuedRead Units Text (Sub-Code 9)This PDU is used to read units text from the control card.Request PDUByte 1By

Modbus RTU 21MN744Parameter Support (H2 Function Code 67)These sub-functions provide special parameter support functions.Parameter Count (Sub-Co

22 Modbus RTU MN744Parameter Support ContinuedParameter Configuration (Sub-Code 2) ContinuedByte 26: Units0 List Parameter (no units)1 Gain or pure

Modbus RTU 23MN744Parameter Support ContinuedParameter Upload (Sub-Code 3)This PDU is used to provide parameter upload functionality from the drive

24 Modbus RTU MN744Parameter Support ContinuedParameter Download (Sub-Code 4)This PDU is used to provide parameter download functionality from a hos

Modbus RTU 25MN744Parameter Support ContinuedRead Parameter Dynamic Fields (Sub-Code 5)This PDU is directed towards the active parameter table only.

Table of ContentsTable of Contents iMN744Modbus RTU 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26 Modbus RTU MN744Poll ControllerThis PDU is used when the response time from the slave is longer than normal. It provides a way to avoid atimeout.

Modbus RTU 27MN744Error MessagesMessage Display DescriptionADDRESS_OUT_OF_RANGE Error addressing FlashAL_SUCCESS no errorALL_AXES_MUST_BE_OFF All Axe

28 Modbus RTU MN744Message Display DescriptionEE_DEVICE_FAILURE Operation on EE device failedEEPROM_ACCESS Error accessing EEPROM deviceFEEDBACK_COMM

Modbus RTU 29MN744Message Display DescriptionINVALID_INPUT digital input out of rangeINVALID_LOCAL_NODE Local CAN node not correct.INVALID_MASTER_CHA

30 Modbus RTU MN744Message Display DescriptionPARAMETERS_LOCKED Parameter are momentarily lockedPHASE_SEARCH_RUNNING Phase search is in progressREAD_

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ii Table of Contents MN744

Modbus RTUModbus RTU 1MN744Modbus Application LayerMODBUS is an asynchronous serial high-speed binary protocol that supports master/slave communicatio

2 Modbus RTU MN744Application Layer SpecificationThe host (master) communicates with the H2 drive (the slave) using a predefined list of standard Modb

Modbus RTU 3MN744Coils (Modbus 0xxxx Reference Set)Coils are read/write control bits. They provide control, source and command features of the Modbus

4 Modbus RTU MN744Write Coils (Function Code 15)This function code is used to force each coil in a sequence of coils to either ON or OFF in a remote

Modbus RTU 5MN744Coil DescriptionTable 4 Coil TableModbus Ref CoilsClass Location Description (When Set)00001 VIS Control Mode Bits 0 NULL MODE - Out