Toshiba TOSVERT VF-S11 - Manual (Page 6)

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2. Data transmission specifications
Items Specifications
Transmission scheme Half-duplex
Synchronization scheme Start-stop synchronization
Communication baud rate 1200/2400/4800/9600*/19200 bps (selectable using a parameter) *1
Communication protocol TOSHIBA Inverter Protocol * / MODBUS-RTU
Character transmission JIS X 0201 8-bit (ASCII)
Binary codes fixed to 8 bits
Stop bit length Received by inverter: 1 bit, Sent by inverter: 2 bits *3
Error detecting scheme Parity *2 : Even */odd/non parity (selectable using a parameter) *1 ,
checksum(Toshiba inverter protocol), CRC(MODBUS-RTU)
Character transmission
format 11-bit characters *1 (Stop bit=1, with parity)
Order of bit transmission Low-order bits transmitted first
Frame length Variable (to a maximum of 17 bytes)
*1: Changes to the communication baud rate and to the parity setting do not take effect until the in-
verter is turned back on or reset.
*2: JIS-X-0201 (ANSI)-compliant 8-bit codes are used for all messages transmitted in ASCII mode
and vertical (even) parity bits specified by JIS-X-5001 are added to them. These even parity bits
can be changed to odd parity bits by changing the parameter setting (a change to the parameter
setting does not take effect until the inverter has been reset.)
*3: Here are the default character transmission formats. (Standard default setting)
Characters received: 11 bits (1 start bit + 8 bits + 1 parity bit + 1 stop bit) ... Standard default setting
START
BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7
PARITY
BIT
STOP
BIT
The inverter receives one stop bit.
(The computer can be set so as to send 1, 1.5 or 2 stop bits.)
Characters sent: 12 bits (1 start bit + 8 bits + 1 parity bit + 2 stop bits) ... Standard default setting
START
BIT BIT0 BIT1 BIT2 BIT3 BIT4 BIT5 BIT6 BIT7
PARITY
BIT
STOP
BIT
STOP
BIT
The inverter sends two stop bits.
(The computer can be set so as to receive 1, 1.5 or 2 stop bits.)
*: Standard
default setting