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4.3. Transmission errors
■ Table of error codes
Error name Description Error code
Impossible to exe-
cute
The command is impossible to execute, though communication was
established normally.
1 Writing data into a parameter whose setting cannot be changed
during operation (e.g., maximum frequency)
*1
2 Writing data into a parameter while “” is in progress
3 The maintenance command is issued.
*2
0000
Data error Invalid data is specified. 0001
Communication
number error
There is no communication number that matches.
Ex.: In the case of (R0)))) CR, 0))) is recognized as a communication
number.
0002
Command error The command specified does not exist. 0003 (ASCII mode)
No code returned (Binary
mode)
Checksum error The Checksum does not match. 0004
Format error The data transmission format does not match.
1 One-digit inverter number (ASCII mode)
2 The CR code is found in the designated position. (ASCII mode)
Ex.:Communication number of 4 digit or less. In the case of (R11)
CR, 11) CR is recognized as a communication number and
the CR code is not recognized, with the result that a format er-
ror occurs.
3 A code other then the stop code (“)”) is entered in the stop code
position.
4 The specified number of bytes of data are not received within 0.5
sec.
No code returned
Receiving error A parity, overrun or framing error has occurred.
*3
No code returned
*1: For parameters whose settings cannot changed during operation, see 11.1, Table of parame-
ters.”
*2: In binary mode, no data will be returned if a command error occurs. When the maintenance
command (M) is issued, an impossible-to-execute error occurs and an error code is returned.
*3: Parity error : The parity does not match.
Overrun error : A new data item is entered while the data is being read.
Framing error : The stop bit is placed in the wrong position.
* For the errors with “no code returned” in the above table, no error code is returned to avoid a data
crash.
If no response is received, the computer side recognizes that a communication error has occurred.
Retry after a lapse of some time.
* If the inverter number does not match, no processing will be carried out and no data will be re-
turned, tough it is not regarded as an error.