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12 NET145LA/NET145CL User
’s Manual Rev1.0C
© 2004 NET GmbH. All rights reserved
5. Serial Protocol and Command
5-1 Protocol
Communication mode : Transmit by Full duplex serial
Data length : 8 bits
Stop bit : 1 bit
Parity : None
Transmission speed : 9600 bps
Refer to Figure3 Serial Connector about cable connection
5.2 Command
5.2.1 Command Format
Command is transferred in the following order..
[STX][CODE1][CODE2][TYPE][DATA1][DATA 2][ETX]
In the case of NET145LA,
STX = ‘\002’, ETX = ‘\003’, ACK = ‘\006’, NACK = ‘\025’
In the case of NET145CL,
STX = ‘Z’, ETX = ‘M’, ACK = ‘\006’, NACK = ‘\025’
•
It is necessary to provide a text start character control code
“STX” at the beginning of
each command, and a text end character control code
“ETX” at the end.
•
All the alphabetic characters of each command should be in capital letters.
Use of lower case characters does not cause the command to be executed.
•
All Commands should be converted to ASCII characters before sending to the camera.
•
In case of transmission of an incorrect command or in the event of a communication
error, a negative acknowledge character code
“NAK” will be sent back from the camera.
Characters Type Command Remark
1st character STX - Start of Command
2
nd
& 3rd character CODE 00 ~ FF Command name
5
th
and 6th character DATA 00 ~ FF Data Value
Last character ETX - End of Command