Toshiba RS485, VF-AS1 Series Data transmission format used in Ascii mode, Inv-No Cmd, Sum

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E6581315

4.1. Data transmission format

„Note: The term “trip status” used in this manual includes retry waiting status and trip retention status.

4.1.1. Data transmission format used in ASCII mode

A communication number is used to specify a data item, all data is written in hexadecimal, and JIS- X-0201 (ASCII (ANSI))-compliant transmission characters are used.

„Computer → Inverter

Omissible in one-to-one communication

For the W and P commands only

Omissible

(3.5bytes

Blank)

"("

(28H)

INV-NO

CMD

2 bytes

1 byte

Communication No.

4 bytes

DATA

0 to 4 bytes

"&"

(26H)

SUM

2 bytes

")"

(29H)

CR

(0DH)

(3.5bytes

Blank)

Checksum area

Omissible

1. “(“ (1 byte)

: Start code in ASCII mode

2.INV-NO (2 bytes) : Inverter number (Omissible in one-to-one communication) ... 00 (30H, 30H) to 99 (39H, 39h), *(2AH)

The command is executed only when the inverter number matches up with that specified using a parameter.

(When * is specified in broadcast communication, the inverter number is assumed to match if all numbers except * match. When * is specified instead of each digit (two-digit number), all inverters connected are assumed to match.)

If the inverter number does not match or if the inverter number is of one digit, the data will be judged invalid and no data will be returned.

3. CMD (1 byte)

: Command (For details, see the table below.)

4.Communication No.(4 bytes)

:Communication number (See 11, “Parameter data.”)

5.Data (0 to 4 bytes): Write data (valid for the W and P commands only)

6.

“&” (1 byte)

: Checksum discrimination code (omissible. When omitting this code, you also need to omit

 

 

the checksum.)

7.

Sum (2 bytes)

: Checksum (omissible)

 

 

Add the ASCII-coded value of the last two digits (4 bits/digit) of the sum of a series of bits

 

 

(ASCII codes) from the start code to the checksum discrimination code.

 

 

Ex.: (R0000&??) CR

 

 

28H+52H+30H+30H+30H+30H+26H=160H

 

 

The last two digits represent the checksum. = 60

 

 

When omitting the checksum, you also need to omit the checksum discrimination

 

 

code.

8.

“)” (1 byte)

: Stop code (omissible)

9.

CR (1 byte)

: Carriage return code

„ Details of commands and data

CMD (1 byte)

Write data (0 to 4 bytes) Hexadecimal number

R (52H): RAM read command

No data

W (57H): RAM/EEPROM write command

Write data (0 to FFFF)

P (50H) RAM write command

Write data (0 to FFFF)

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Contents Tosvert VF-AS1 Series RS485 Communication Function E6581315②Read first Safety precautions E6581315Contents Bit Word General outlines of the communication functionBIT15 BIT8BIT7 BIT0 Data transmission specifications BIT2MOUBUS-RTU Communication protocolAbout the handling of received frames Binary mode 2FH Toshiba Inverter ProtocolData transmission format used in Ascii mode Data transmission formatINV-NO CMD Data5bytes Blank 28H Bytes Checksum areaINV-NO Data SUMData transmission format used in binary mode Command received Returned for the 57H W and 50H P commandsByte Bytes Sum 1 bytes Checksum not omissible 00H to FFHNorn 2FH Byte 4EH6EH BytesTransmission format of Block Communication Page Bytes Blank Start Code INV-NO Commands Dummy data is required for this commandReads the data with the specified communication number Block communication Computer InverterRFE03CR RFE03077BCRPage Communication There is no communication number that matches Transmission errorsFormat error Data transmission format does not match Broadcast communication function VF-AS1 Examples of the use of communication commands Ascii mode Computer → Inverter Inverter → ComputerFrom the computer H = 24d  trip status RFC90CRExamples of Communication programs =LENS$ For I=1 to L NextInput #1,B$ GotoPrint #1,B$ 160 T=TIMER COUNT=TIMER-TIf Count 0 then T=TIMER Page Text2.Text = Text1.Text = End Sub End IfMSComm1.Output = Text2.Text & Chr13 End Sub MODBUS-RTU protocol Inverter number CRC Read commandMODBUS-RTU transmission format Write command Blank Command 1 byte5bytes Blank Command 1 byte Text size is 8 bytes fixed InverterError codes CRC GenerationBit counter = End Return CRCInter-drive communication E6581315 QWiring 2-wire RS485 communication Never use pin-7 P11 QWiring 4-wire RS485 communication）Page Parameters relating to the slave side example Proportional control of speed =0.01%Slave 100.00Hz 00% 90.00Hz 45.00HzSlave 100.00Hz1 00% 80.00Hz 40.00HzTransmission format for inter-drive communication INV-NO 1 byte Inverter numberCommunication parameters 0OFFMODBUS-RTU Baud rate,  , Parity  Inverter number„ Timer Time-out period Computer link PC → INVMaster INV To Slave INV INV → PC PC → INVUse this function for the following case Send waiting time , Free notes Commands and monitoring from the computer Communication commands commands from the computerPI OFF OFFElectric Power quantity Forcibly braked Preliminary excitationBrake release B Braking answer BAWire RS485 communication FA32 „ Terminal board output data FA50 „ FM analog output FA51„ AM analog output FA52 Output terminal no Specified data outputUnit 0.01% N·m Monitoring from the computerRFD00CR „ Input terminal board status FD06, FE06 RESInput terminal function selection 9 f119 BIT15„ Output terminal board status FD07, FE07 „ Inverter operating status 1 FD01, FE01 ST=ON ST=OFF„ Inverter operating status 2 FD42, FE42 „ Inverter operating status 3 FD49, FE49Preset speed operation „ Inverter operating command mode status FD45, FE45„ Inverter operating frequency mode status FD46, FE46 Bit Specifications Remarks „ Alarm information monitor FC91„ Cumulative operation time alarm monitor FE79 E6581315 „ Inverter model capacity code FB05 Model DataUtilizing panel LEDs and keys by communication LED setting by communicationParameter Name Range Setting „ Block Communication Function for LED Display Ascii LED display data code 00H-1FH are blank BlankFA10=1 Key utilization by communicationFA10=0 Parameter data EEP ROMPage Alarm code FE02 Frequency command value 01HzFE19 Torque command FE29 Input powerFE84 Binary input value option Tion FE80 Cumulative power on timeE6581315 FD50 Light-load high-speed torque 01% Appendix 1 Table of data codes CanSUB ESCAppendix 2 Response time Response time „ Data transmission timeAppendix 3 Compatibility with the communication function VF-A7Appendix 4 Troubleshooting Appendix 5 Connecting for RS485 communication RXA RXBTXA TXB

RS485, VF-AS1 Series specifications

The Toshiba VF-AS1 Series represents a significant advancement in the realm of variable frequency drives (VFDs), designed for various industrial applications that demand precision, efficiency, and reliability. With support for RS485 communication, the VF-AS1 Series fosters seamless integration into complex automation systems, making it the perfect choice for modern manufacturing environments.

One of the standout features of the Toshiba VF-AS1 Series is its versatile communication capabilities. The built-in RS485 port allows for easy connectivity with a range of devices, including PLCs (Programmable Logic Controllers) and HMIs (Human-Machine Interfaces). This ensures real-time monitoring and control of motor functions, enhancing operational efficiency and data analysis.

The VF-AS1 Series is engineered with advanced control technologies that provide exceptional motor performance. It incorporates vector control algorithms that optimize torque and speed regulation for both standard and permanent magnet motors. This results in precise motor control across a wide range of speeds and load conditions, ensuring optimum performance and energy savings.

Another noteworthy characteristic is its user-friendly interface. The VF-AS1 features a clear LCD display that allows for easy navigation and configuration. This intuitive design minimizes the learning curve for operators and technicians, facilitating quick setup and adjustments. Additionally, the series supports various programming options, catering to both novice users and experienced professionals.

Energy efficiency is a key priority in the design of the VF-AS1 Series. The drives are equipped with energy-saving features that help reduce overall power consumption and operational costs. With built-in sleep modes and dynamic energy feedback, these drives optimize energy usage based on demand, making them suitable for both constant and variable load applications.

In terms of safety and protection, the VF-AS1 Series incorporates various built-in safeguards, including overvoltage, undervoltage, and overcurrent protection. This comprehensive approach to safety not only protects the drive itself but also ensures the longevity of connected equipment.

Overall, the Toshiba VF-AS1 Series, with its robust feature set, advanced technologies, and focus on energy efficiency, proves to be a reliable choice for a wide range of industrial applications. Its integration of RS485 communication allows for enhanced connectivity and control, making it an excellent solution for modern automation needs.
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