— 9-24 —
9.3.2.2. Command Entry
l
A communication command shall consist of “a command (character string) + data (if necessary)
+ carriage return code (0DH).”
l
If the velocity gain is to be set to 0.5, for example, “VG0.5” should be entered by adding data of
0.5 to a VG command. The characters of this command with data are transmitted to the Driver
Unit as shown below :
Figure 9-22: Example Of VG0.5
Press the ENT key if the handy terminal
FHT11 is used.
V code (56
H
)
G code (47
H
)
0 code (30
H
)
. code
(2E
H
)
5 code (35
H
)
Carriage return code (0D
H
)
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Every time a character is input, the Driver Unit echoes the character back to the terminal. (The
Driver Unit returns the same character that it receives.)
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However, the Driver Unit converts carriage return code to “carriage return code (0DH) + line
feed code (0AH),” then returns it to the terminal.
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When a carriage return code is input, the Driver Unit decodes a character string which it has
received (VG0.5 in the example above) and executes it. Therefore, a command is not executed
unless it ends with a carriage return code.
l
If the Driver Unit can decode an entered command, it returns “ : “ immediately after the line feed
code. If it receives an internal data read command, etc., it returns the data before “ : “.
Figure 9-23: Successful input example
:VG0.5
:_
Entered command.
Waiting for another command to be entered.
Input (To Driver Unit)
0D
H
5
.
0
G
V
Echo back (From Driver Unit)
:
0A
H
0D
H
5
.
0
G
V
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