Installation Guide

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5 Instruction set / structure of the instruction set
5.1 General
The command set described below defines the transfer of data on the serial interface.
The commands consist of a command code and optionally of a parameter value. Commands are ter-
minated by the control character <CR> (13h). The control character serves as command line termi-
nator.
Command codes and parameters, that means all letters and numerical values, are principally trans-
mitted as a sequence of ASCII characters (the value 255 (decimal) consequently as 32H, 35H, 35H;
the command RST as 52H, 53H, 54H).
5.1.1 Entering instuctions
The protocol format is as follows
Command <SP> parameter <CR>
The space character <SP> separates commands from parameters and the <CR> character acts as
command line terminator.
For commands without parameter values (e.g. GT ) the <SP> character and parameter values are
omitted. The command line is as short as this:
Command <CR>
5.1.2 Output format
Generally, every input terminated by <CR> is acknowledged by the reader. The following response
protocols are different: