Holland Electronics NE 1101L - Manual (Page 16)

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Forward Optical Receiver Operation Manual
Chapter 5 Status monitoring and communication interface
RS-485/RS-232 Commands
Table 1 below summarizes the commands available through the serial interface, and specifies the command
message formats. The responses to different commands from the unit are given in the tables 2 through 5.
Please note that commands must be issued in CAPITAL LETTERS.
Command
Type
Command Description To unit From unit
S Return Status in LCD display format AT: xxxx0S
(See note) See Table 2
A Return Alarm Information
In LCD display format AT: xxxx0A See Table 3
B Return Status in binary format
AT: xxxx0B See Table 4
C Return Alarm Information
In binary format
AT: xxxx0C See Table 5
Note: The notation “xxxx” is the unit’s ID expressed in four hexadecimal characters. The MSB comes first and
LSB follows last. In case when the ID is not known, “FFFF” can be used in its place. Since any unit would
respond to this kind of “address-all” message, it is necessary to limit the reach of this address-all command to
one and only one unit. The “xxxx” is followed by a zero and command type character.
The whole command string should be terminated with a Carry-Return code (0x0D in hexadecimal).
TABLE 1: Command List
The following table defines the response S format.
Each line is ended with one set of <Carriage Return> and <Line Feed>. The whole message block is
terminated with TWO sets of <CR> and <LF> characters.