10.
Ethernet communication
Following protocol are support over Ethernet connection:
Gamma Protocol (Running on TCP port 23)
10.1.
Gamma Protocol Over Ethernet Connection
Gamma protocol command packet structure over Ethernet
connection
A raw TCP session may be established to port TCP 23, allowing remote
control. Once the TCP session is established, commands may be issued.
Note:
In comparison to communication over serial connection, no address field and no
checksum fields are required.
Gamma protocol response packet structure over Ethernet
connection
In comparison to response structure over serial communication, no address
and no checksum fields are supplied in response. See
response packet structure over serial connection
on page 27 for more
information.
Examples - Gamma protocol over Ethernet connection
Example 1
Command - SYS GET MODEL, 0x01
Tx – “cmd 01” + cr
Rx – “OK 00 DIGITEL TSPq”+ cr + cr +lf + “>” characters.
Note:
‘cr’ stands for carriage return ASCII character, ‘lf’ stands for line feed ASCII character.
Command packet structure over Ethernet connection
START
space
COMMAND
CODE
space
DATA
(optional)
TERMINATOR
CHAR
3 bytes
1 byte
2 bytes
1 byte
(variable)
1 byte
Field
Size
Comment
1
START
3 ASCII hex characters
ASCII characters are
‘cmd’
Start is the first 3 digits in the command packet and tells controller to start
decoding a message.
3
COMMAND CODE
2 ASCII hex characters
Range 00 through FF
See
Table: Gamma protocol commands
for list of available command codes. The
command code must be two hex digits, even if the first digit is a zero.
Page 33
900035_B
900035_B - Ethernet communication
