YASKAWA GA700 - Page 326

5.3 MEMOBUS/Modbus Communications
326 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Error Code
(Hex.)
Name Cause
22 Write Mode Error
• Tried to write a disabled parameter during run.
• When there was a CPF06 [EEPROM Memory Data Error], the master tried to write a parameter
other than one of these:
– A1-00 [Language Selection]
– A1-01 [Access Level Selection]
– A1-02 [Control Method Selection]
– A1-03 [Initialize Parameters]
– A1-04: [Password]
– A1-05: [Password Setting]
– E1-03 [V/f Pattern Selection]
– o2-04 [Drive Model (KVA) Selection]
• Writes the read-only data.
23
DC Bus
Undervoltage Write
Error
During Uv [DC Bus Undervoltage], a Uv write disabled parameter was written.
24
Error Writing Data
During Parameter
Processing
Tried to write a parameter from the master during parameter processing on the drive side.
25
Writing into
EEPROM Disabled
Writing into EEPROM write is disabled, but EEPROM write was executed from MEMOBUS/
Modbus communications. When this error occurs, the keypad shows a message and the drive
continues operation.
■ No Response from Slave
The slave ignores the command message from the master and will not send a response message in these
conditions:
• When a communications error (overrun, framing, parity, CRC-16) is detected in the command message.
• When the slave address in the command message and the slave address for the drive side do not agree (Use H5-
01 [Drive Node Address] to set the slave address of the drive)
• When the time interval between the data of which the message is composed is longer than 24 bits
• When the data length for the command message is not accurate
Note:
• If the keypad shows CALL [Serial Comm Transmission Error], refer to “Troubleshooting” to remove the cause of the error, and try to
do communications again. If the keypad does not show CALL, check U1-19 [MEMOBUS/Modbus Error Code] for the error and error
type.
• If you execute the write function code when the slave address in the command message is 00 (Hex.), all of the slaves will execute the
write command, but they will not send response messages to the master.