TECHNICAL INFORMATION
7
6 87-900-913-01 (
N
)
RS 232-422 Communication Descriptions
Communication RS 232 serial port connections
Communication RS 422 serial port connections
Transmission Channel Characteristics
levels:
RS 232/RS 422
baud rate:
9600/4800/2400/1200/600
programmable
character length: 8 bits
parity: none
stop bit:
1 bit
protocoll:
master (PC) / slave (converter)
In this case the value to be assigned to the ADDRESS
field must be 80 hex (for RS 232 and 422 only).
RS 485 Communication Description
Communication RS 485 serial port connections
Transmission Channel Characteristics
levels: RS
485
baud rate:
9600/4800/2400/1200/600
programmable
character length: 8 bits
parity: none
stop bit:
1 bit
protocoll:
master (PC) / slave (converter)
max. devices:
32
Message Structure
(request and answer have the same format)
The master system (PC) starts every session sending
the following message to the slave units connected:
<STX> / <ADDR> + <WINDOW> + <COMMAND> +
<DATA> + <ETX> + <CRC>
where:
<STX> =
0x02
<ADDR> =
0x80 (for RS 232 and
RS 422 only)
<ADDR> =
0x80 + device number (0...31)
0xFF: brodcasting command
(recognized by all the devices, it
doesn’t implicate any answer)
(for RS 485 only)
<WINDOWS>=
' 000 '...' 999' window number
the meaning of the window
depends to the device type
<COMMAND>=
0x30: window value reading
0x31: window writing
GND
B(-) RXD
A(+) RXD
B(-) TXD
A(+) TXD
B(-) RXD
A(+) RXD
B(-) TXD
A(+) TXD
(-)
(+)
(-)
(+)
Содержание Turbo-V 2000 HT
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