Data Transmission Specifications - Toshiba Tosvert RS485 Instruction Manual

2. Data transmission specifications

Items
Transmission scheme
Synchronization scheme
Communication baud rate
Communication protocol
Character transmission
Stop bit length
Error detecting scheme
Character transmission
format
Order of bit transmission
Frame length
*1: Changes to setting do not take effect until the inverter 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 format.
Characters received: 11 bits (1 start bit + 8 bits + 1 parity bit + 1 stop bit)
START
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)
START
BIT
The inverter sends two stop bits.
(The computer can be set so as to receive 1, 1.5 or 2 stop bits.)
Half-duplex
Start-stop synchronization
9600/19200*/38400 bps (selectable using a parameter)
TOSHIBA Inverter Protocol * / MODBUS-RTU (selectable using a parameter)
<ASCII mode> JIS X 0201 8-bit (ASCII)
<Binary mode, MODBUS-RTU> Binary codes fixed to 8 bits
Received by inverter: 1 bit, Sent by inverter: 2 bits
*2
Parity : Even */Odd/Non parity (selectable using a parameter)
checksum(Toshiba inverter protocol), CRC(MODBUS-RTU)
*1
11-bit characters (Stop bit=1, with parity)
Low-order bits transmitted first
Variable (to a maximum of 17 bytes)
BIT0 BIT1 BIT2
BIT2
BIT0 BIT1
Specifications
*3
BIT3 BIT4 BIT5 BIT6
BIT3 BIT4 BIT5 BIT6
4
E6581315
*: Standard
default setting
*1
*1
*1
,
PARITY STOP
BIT7 BIT BIT
PARITY STOP
BIT7 BIT BIT
STOP
BIT