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APPLICATIONNOTEAN‐BEI‐H2‐038 Date:15/02/12

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AN‐BEI‐H2‐038ModbusRTUControlandRegisterMapping

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BFIApplicationsSupportLibrary

ApplicationNote AN‐BEI‐P2‐038

Title ModbusRTUControlandRegisterMapping

RelatedProducts BeijerFrequencyInverterH2

Level

3

1–Fundamental‐Nopreviousexperiencenecessary

2–Basic–SomeBasicdrivesknowledgerecommended

3–Advanced–SomeBasicdrivesknowledgerequired

4–Expert–Goodexperienceintopicofsubjectmatterrecommended

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Overview:

ThisdocumentprovidesinformationontheModbusRTUmemorymappingthatisimplementedintheBeijerFrequencyInverter

H2drives,detailingwhichaddressesareusedtoreadandwritedatato/fromtheBeijerFrequencyInverterH2inaModbusRTU

network.AlldataregisterswithinthedriveareHolding

Registers,andcanbeaccessedbymeansoftheModbuscommands03

ReadMultipleHoldingRegistersand06WriteSingleRegisteronly.

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TheModbusRequestPDU specifies the starting registeraddressandthe numberofregisters.In this case, with some Modbus

Master Systems, it may be necessary to subtract

1 from the register number (e.g. some systems treat holding register 1 as

address0).

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TheManufactureradoptsapolicyofcontinuousimprovementandwhilsteveryefforthasbeenmadetoprovideaccurateandup

todateinformation,theinformationcontainedinthisdocumentshouldbeusedforguidancepurposes

onlyanddoesnotform

thepartofanycontract.

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MODBUSRTUProtocolSpecification:

ThefollowingtablehighlightsthespecificationfortheModbusRTUimplementation.

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Protocol ModbusRTU

Errorcheck CRC

Baudrate ParameterSelectableasfollows:‐

9600bps,19200bps,38400bps,57600bps,115200bps(default)

Dataformat ParameterSelectableasfollows:

1startbit,8databits,1stopbits,noparity.(default)

1startbit,8databits,2stopbits,noparity.

1startbit,8databits,1stopbits,evenparity.

1startbit,8databits,1stopbits,odd

parity.

Physicalsignal RS485(2‐wire)

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Summary of content (14 pages)

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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 BFI Applications Support Library Application Note AN‐BEI‐P2‐038 Title Modbus RTU Control and Register Mapping Related Products Beijer Frequency Inverter H2 1 – Fundamental ‐ No previous experience necessary Level 3 2 – Basic – Some Basic drives knowledge recommended 3 – Advanced – Some Basic drives knowledge required 4 – Expert – Good experience in topic of subject matter recommended Overview: This document provides information on the Modbus RTU memory mapp
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Modbus Telegram Structure: The following Modbus Commands are supported • 03 Read Holding Registers • 06 Write Single Holding Register The telegram structure is as follows:‐ Command 03 – Read Holding Registers Master Telegram Length Slave Response Slave Address 1 Byte Slave Address Function Code (03) 1 Byte Function Code (03) 1st Register Address 2 Bytes Byte Count No. Of Registers 2 Bytes 1st Register Value CRC Checksum 2 Bytes 2nd Register Value Etc...
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Memory Map: Table 1: Control and status registers Register 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Upper byte Lower Byte Drive Control Command Word Frequency Setpoint (Reference) Reserved Command 03,06 03,06 Type Read/Write Read/Write 500 = 50.0 Hz Modbus ramp control time Reserved 03,06 Read/Write 3000 = 30.00 Seconds 03 03 03 Read Only Read Only Read Only 500 = 50.0Hz 100 = 10.
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APPLICATION NOTE AN‐BEI‐H2‐038 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 User register 11 User register 12 User register 13 User register 14 User register 15 Analog output 1 user Analog output 2 user Reserved Reserved Relay output 1 user Relay output 2 user Relay output 3 user Relay output 4 user Relay output 5 user User display scaling User display decimal User speed reference User torque reference User ramp Scope index 1,2 Date: 15/02/12 03,06 03,06 03,06 03,06 03,06 03,06 03,06 03,06
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Register 8: Output Current This register displays the output current from the drive. The data is 16bit integer with one decimal place. E.g. 156 = 15.6A, 12 = 1.2A. Register 10: Output Power This register displays the output power level. The data is 16bit integer with two decimal places. E.g. 1000 = 10.00kW Register 11: Digital input status The value in this register represents the digital status of the drive control input terminals.
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Drive Parameters: All User Adjustable parameters in Groups 1 to 8 can be accessed by Modbus. For further details regarding the parameter functions, please refer to the Beijer Frequency Inverter H2 User Guide.
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Group 2 : Extended parameter set (Level 2) Parameter P2‐01 P2‐02 P2‐03 P2‐04 P2‐05 P2‐06 P2‐07 P2‐08 P2‐09 P2‐10 Register Number 201 202 203 204 205 206 207 208 209 210 P2‐11 211 P2‐12 P2‐13 P2‐14 212 213 214 Description Range Scaling Type Preset speed 1 Preset speed 2 Preset speed 3 Preset speed 4 Preset speed 5 Preset speed 6 Preset speed 7 Preset speed 8 Skip frequency centrepoint Skip frequency band ‐7200 to 7200 (Limited by P1‐01) ‐7200 to
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APPLICATION NOTE AN‐BEI‐H2‐038 Parameter Register Number Description P2‐18 218 User relay 2 output function select P2‐19 P2‐20 P2‐21 219 220 221 User relay 2 upper limit User relay 2 lower limit Display scaling factor P2‐22 222 Display scaling source P2‐23 223 Zero Speed holding time P2‐24 224 Effective switching frequency P2‐25 225 Fast deceleration ramp time P2‐26 226 Spin start enable P2‐27 227 Standby mode P2‐28 228 Slave speed scaling control P2‐29 229 Slave Speed scalin
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Group 3 : User PID control (Level 2) Parameters Register Number Description Range Scaling Type P3‐01 301 User PID Proportional Gain 1 to 300 1 = 0.1 U16 P3‐02 302 User PID Integral time constant 0 to 300 1 = 0.1 U16 P3‐03 303 User PID Differential time constant 0 to 100 1 = 0.01 U16 P3‐04 304 User PID operating mode P3‐05 305 User PID reference select P3‐06 306 User PID digital reference 0 to 1000 1 = 0.
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Group 6 : Advanced Parameter set (Level 3) Par Register Description P6‐01 601 Firmware Upgrade enable P6‐02 602 Auto thermal management P6‐03 P6‐04 P6‐08 603 604 608 Auto‐reset delay time User relay hysteresis band Max speed ref frequency P6‐10 610 Enable PLC operation P6‐11 P6‐12 611 612 Speed hold time on enable Speed hold time on disable P6‐18 618 DC injection braking voltage P6‐22 622 Reset cooling fan run‐time P6‐23 623 Reset kWh
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Group 8 : Application Specific Parameters ‐ Level 3 Parameter P8‐01 P8‐02 Register Number 801 802 Description Range Stir Function Interval Time Stir Activity Time 0 to 6000 1 to 6000 0 : Disabled 1 : Active on Start Only 2 : Active on Torque Detection Only 3 : Active on Start & Over Torque Detection 0 to 600 0 to 60000 0 : Disabled 1 : Low Load Detection 2 : High Load Detection 3 : Low & High Load Detection 10 to 1000 0 to 60 0 : Open Activation (Normally
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Drive Error Code Information: In the event of a trip, an error code is returned in the High Byte of the drive status word. The fault values correspond to the following table. Fault Code no‐Flt OI‐b OL‐br O‐I I.t‐trp SAFE‐1 O‐Volt U‐Volt O‐t U‐t P‐dEF E‐trip SC‐ObS FLt‐dc P‐LOSS h O‐I th‐Flt dAtA‐F 4‐20 F dAtA‐E U‐dEF F‐Ptc FAN‐F O‐hEAt O‐torq U‐torq Out‐F Err‐01 Err‐02 SAFE‐2 Enc‐01 Enc‐02 Enc‐03 Enc‐04 Enc‐05 Enc‐06 Enc‐07 Enc‐08 Enc‐09 Enc‐10 No.
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APPLICATION NOTE AN‐BEI‐H2‐038 Date: 15/02/12 Modbus Exception Response Telegrams: Under some circumstances, the drive may reply with an Exception Response (error) in response to a request telegram sent from the network master, for example where the master tries to read a register which does not exist. Exception Responses which can be generated by the drive are listed below :‐ Exception Code 1: Invalid Request Returned under the following conditions • Network Master sends an unsupported Modbus command (e.
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APPLICATION NOTE AN‐BEI‐H2‐038 Appendix: Revision History Version Comments 1.00 First Release 1.