Communications Error Codes
Chapter 7-8
7-8 Communications Error Codes
The Inverter will detect a communications error if normal communications fail or a message data error occurs.
The Inverter returns a response that consists of the Slave address, function code with the MSB set to 1, error code, and CRC-16 check block when the communications error is detected.
When the Master receives an error code, refer to the following table for troubleshooting and remedying the error.
Errors and Remedies
Error code
01 Hex
02 Hex
03 Hex
21 Hex
22 Hex
Name
Function code error
Register number error The specified register number has not been registered. Check and correct the
An attempt was made to read the register of the Enter register number.
command.
Data number error The number of write or read registers is not within a range from 1 to 16 (0001 and 0010 Hex).
Check and correct the number of registers or the number of bytes.
The number of registers of the DSR message multiplied by two does not coincide with the number of bytes of the attached data.
Data setting error
Write mode error
Probable cause
The function code is set to a code other than 03, 08, or
10 Hex.
The write data is not within the permissible range.
The data set is illegal and causes an OPE (OPE1 through OPE9) error.
The Inverter in operation received a DSR message to write data to a parameter that prohibits any data to be written while the Inverter is running.
The Enter command was received while the Inverter is running.
Remedy
Check and correct the function code.
Check the display on the Digital Operator and correct the data.
Write the data after stopping the Inverter.
The Inverter detecting UV received a DSR message to write data.
The Inverter detecting UV received the Enter command.
The Inverter detecting F04 for an initialization memory fault received a DSR message other than that for parameter initialization (with n01 set to 8 or 9).
Write the data after restoring the UV (main circuit (main circuit undervoltage) status.
Turn the Inverter OFF and ON after parameter initialization with n01 set to 8 or 9.
The Inverter processing data written received a DSR message to write data.
Wait for an elapse period equivalent to 24 bits plus a minimum of
10 ms to issue the message after a response is received from the Inverter.
A DSR message to a read-only register was received. Check and correct the register number.
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