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RS-232 / IP Communication Protocol
The HXL-88 RS-232 communication protocol uses a fixed length with 5 bytes of data as defined below.
The default baud rate is 9600 bps, no parity bit, 8 data bits, and 1 stop bit. The IP communication uses
Telnet default. Use IP address or hostname with port 23 to connect to device. The commands and
responses are the same for RS-232 and IP.
Host Request
A standard command is composed of the following 5 bytes:
C Index + Value + CRC
Byte 1: Device Byte (DB)
Byte 2: Request Byte (RB)
Byte 3: Index Byte (IB)
Byte 4: Value Byte (VB)
Byte 5: CRC Byte (CB)
* Note: Host must send CRC code following the last byte.
Device Byte (DB)
Name
Bit 7
Bit 6
Bit 5 Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DB
0
0
1
0
0
0
0
0
Device ID: Device ID should be set to
0x20.
Request Byte (RB)
Name
Bit 7
Bit 6
Bit 5 Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RB
0
0
Request Type (000000-111111)
Request Type: Please refer to
“Table – Host Request List”.
