Toshiba TOSVERT VF-AS3 Instruction Manual page 9

2
Transmission specifications
Item
Transmission scheme
Synchronization
scheme
Communication baud
rate
Communication
protocol
Character
transmission
Stop bit length
Error detecting
scheme
Character
transmission format
Order of bit
transmission format
Frame length
*1 After changing the baud rate setting or communication parity setting, turn off or reset the inverter to reflect the setting.
*2 All messages transmitted in ASCII mode have a vertical parity bit (even) defined in JIS-X-5001 added by using Roman 8-bit codes
compliant with JIS-X-0201 (ANSI). In the parameter setting, you can change it to an odd parity (reflected after reset).
*3 Character transmission is as follows.
When received by inverter: 11 bits (1 start + 8 bits + parity + 1 stop)
START
BIT BIT0
The inverter receives with 1 stop bit.
(The computer can send with 1, 1.5, or 2 stop bit.)
When sent by inverter: 12 bits (1 start + 8 bits + parity + 2 stop)
START
BIT BIT0
The inverter sends with 2 stop bit.
(The computer can receive with 1, 1.5, or 2 stop bit.)
VF-AS3
Half duplex
Start-stop synchronization
9600/19200/38400 (Parameter setting)
TOSHIBA inverter protocol/MODBUS-RTU (Parameter setting)
<ASCII mode> JIS X0201 8-bit (ASCII)
<Binary mode, MODBUS-RTU> Binary codes fixed to 8 bits
Received by inverter: 1bit/Sent by inverter: 2 bits
*2
Parity: Even/Odd/Non parity (selectable using a parameter)
Checksum (TOSHIBA inverter protocol), CRC (MODBUS-RTU)
*3
11-bit characters (Stop bit =1, with parity)
LSB first
Variable
BIT1 BIT2 BIT3 BIT4
BIT1 BIT2 BIT3 BIT4
2-1
Bold font indicates the default setting.
Specifications
*1
*3
PARITY STOP
BIT5 BIT6 BIT7 BIT
PARITY STOP
BIT5 BIT6 BIT7 BIT
*1
*1
,
BIT
STOP
BIT BIT
2. Transmission specifications
I
II
III
1
2
3
4
5
6
7
8
9
10
A1
A2
A3
A4
I
16
17
18