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• Parameter error
When the unit cannot properly process the received command, the unit sends back an error code to the PC. After clearing
the receive buffer, the unit enters the wait state until receiving the following [STX] command.
• If the unit receives another command during the response, the unit will respond to the command after processing the cur-
rent response.
• If the unit received the [STX] command again before receiving the [ETX] command, the unit will clear the internal buffer.
Then, the unit will process the data following to the [STX] command. (The commands received before the second [STX]
command will be canceled.)
• The internal buffer will be cleared when it fills up.*
Reason for the error
001: Command invalid (There is no associated command.)
002: Parameter invalid (The number, digit, or range of the command
parameters is incorrect.)
003: Command invalid (The unit does not support the operation mode.)
E: Command error (ASCII code: 45H)
ER
N
[ETX]
=Error
(9) (PC -> This unit) Logout.
[STX]AD001;OLO [ETX]
When receiving the command above, the user logged in via SERIAL (RS232C) (ADMIN) will log out.
(10) (This unit - > PC) Response against (9).
[STX]AD001;OLO[ETX]
Note:
The character code of [STX], [ETX] and [SP] are as follows.
[STX]: 02h
[ETX]: 03h
[SP] (space): 20h
3. Reception Error
The response command differs between the reception error and parameter error.
• Communication error (Reception error)
When the unit cannot properly receive the command due to the communication error, the unit immediately sends back the
NACK code to the PC. After clearing the receive buffer, the unit enters the wait state until receiving the following [STX]
command.
[NCK] = Reception failed (ASCII code: 15H)
Reason for the communication error
1: Parity error (ASCII code: 31H)
2: Framing error (ASCII code: 33H)
3: Overrun error (ASCII code: 34H)
N
