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24
Command
Echo back
When the echo back function is set to ON, a string of a transmitted command
is sent back from a destination to let operators know that the command has
been entered properly.
The Echo command is used to turn ON/OFF the echo back function and
check the current setting.
Result code
This is a response data that indicates execution results of commands. The
structure of a result code is shown below.
Result code = “R+” + “four-digit number”
The four-digit number following the prefi x character “R+” indicates the situ-
ations described below.
Numbers
Contents
0000
Normal end
This is a response to the situation where the command (setting or
request) is executed normally.
0001
Command error
This is a response to the situation where the specifi ed command
cannot be recognized.
0002
Parameter error
This is a response to the situation where the number of parameters and
the parameter type allowed for the specifi ed command are not met.
0003
Designation error
This is a response to the situation where a setting is made with a
command which can only handle requests, or a request is made
with a command which can only handle settings.
0004
Status error
This is a response to the situation where the command (setting or
request) cannot be executed in a current situation.
Transfer codes
The codes (control codes) used for communication with the NL-42/NL-52
are as follows.
Code
Hex notation
Meaning
[CR]
0D
H
Terminator, (1st character)
[LF]
0A
H
Terminator, (2nd character)
[SUB]
1A
H
Stop request
Содержание NL-42
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