Appendix 2 Response time | Toshiba TOSVERT VF-AS1 guide

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E6581315

Appendix 2 Response time

The communication response time can be calculated from data communication time and inverter processing time. When wishing to know the communication response time, calculate using the following as a reference

Interval corresponding to 3.5 bytes

Data transmission time

Data processing time of inverter (Approx. 8 ms)

PC → Inverter

Data transmission time

Inverter → PC

Response time

Data transmission time

1
Data transmission time = baud rate	⋅ number of bytes transmitted⋅ number of bits

*Number of bits = start bit + data frame length + parity bit + stop bit

*Minimum number of bits = 1 + 8 + 0 + 1 = 10 bits

*Maximum number of bits = 1 + 8 + 1 + 2 = 12 bits

<An example of the calculation of the transmission time: 19200 bps, 8 bytes, 11 bits>

Data transmission time =	1	⋅ 8 ⋅11 = 4.6ms
	19200

Data processing time of inverter Data processing time: maximum 8 ms

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Toshiba TOSVERT VF-AS1 instruction manual Appendix 2 Response time, Response time „ Data transmission time

Contents

E6581315② Tosvert VF-AS1 Series RS485 Communication Function E6581315 Read first Safety precautions Contents General outlines of the communication function BIT15 BIT8BIT7 BIT0Bit Word BIT2 Data transmission specifications Communication protocol About the handling of received framesMOUBUS-RTU Toshiba Inverter Protocol Binary mode 2FH Data transmission format Data transmission format used in Ascii modeINV-NO CMD Data 28H Bytes Checksum area 5bytes Blank Data SUM INV-NO Data transmission format used in binary mode Returned for the 57H W and 50H P commands Command receivedByte Bytes Sum 1 bytes Checksum not omissible 00H to FFH 2FH Byte 4EH6EH Bytes Norn Transmission format of Block Communication Page Bytes Blank Start Code INV-NO Dummy data is required for this command CommandsReads the data with the specified communication number Block communication Computer Inverter RFE03077BCR RFE03CRPage Transmission errors Format error Data transmission format does not matchCommunication There is no communication number that matches Broadcast communication function VF-AS1 Ascii mode Computer → Inverter Inverter → Computer Examples of the use of communication commandsFrom the computer H = 24d  trip status RFC90CR Examples of Communication programs Next =LENS$ For I=1 to LInput #1,B$ Goto 160 T=TIMER COUNT=TIMER-T If Count 0 then T=TIMERPrint #1,B$ Page End If MSComm1.Output = Text2.Text & Chr13 End SubText2.Text = Text1.Text = End Sub Inverter number  MODBUS-RTU protocol Read command MODBUS-RTU transmission formatCRC Blank Command 1 byte Write command5bytes Blank Command 1 byte Text size is 8 bytes fixed Inverter CRC Generation Error codesBit counter = End Return CRC Inter-drive communication Never use pin-7 P11 QWiring 4-wire RS485 communication） E6581315 QWiring 2-wire RS485 communicationPage Parameters relating to the slave side example =0.01% Proportional control of speed 90.00Hz 45.00Hz Slave 100.00Hz 00%Slave 100.00Hz1 00% 80.00Hz 40.00Hz INV-NO 1 byte Inverter number Transmission format for inter-drive communication 0OFF Communication parameters MODBUS-RTU Inverter number Baud rate,  , Parity  PC → INV „ Timer Time-out period Computer linkMaster INV To Slave INV INV → PC PC → INV Send waiting time ,  Free notesUse this function for the following case Communication commands commands from the computer Commands and monitoring from the computerPI OFF OFF Forcibly braked Preliminary excitation Electric Power quantityBrake release B Braking answer BA Wire RS485 communication FA32 „ FM analog output FA51 „ Terminal board output data FA50„ AM analog output FA52 Output terminal no Specified data output Monitoring from the computer RFD00CRUnit 0.01% N·m RES „ Input terminal board status FD06, FE06Input terminal function selection 9 f119 BIT15 „ Output terminal board status FD07, FE07 ST=ON ST=OFF „ Inverter operating status 1 FD01, FE01 „ Inverter operating status 3 FD49, FE49 „ Inverter operating status 2 FD42, FE42 „ Inverter operating command mode status FD45, FE45 „ Inverter operating frequency mode status FD46, FE46Preset speed operation „ Alarm information monitor FC91 „ Cumulative operation time alarm monitor FE79Bit Specifications Remarks E6581315 Model Data „ Inverter model capacity code FB05 LED setting by communication Parameter Name Range SettingUtilizing panel LEDs and keys by communication „ Block Communication Function for LED Display Blank Ascii LED display data code 00H-1FH are blank Key utilization by communication FA10=0FA10=1 Parameter data ROM EEPPage FE02 Frequency command value 01Hz Alarm codeFE19 Torque command FE29 Input power Tion FE80 Cumulative power on time E6581315 FD50 Light-load high-speed torque 01%FE84 Binary input value option Can Appendix 1 Table of data codesSUB ESC Response time „ Data transmission time Appendix 2 Response time VF-A7 Appendix 3 Compatibility with the communication function Appendix 4 Troubleshooting Appendix 5 Connecting for RS485 communication RXB RXATXA TXB