YASKAWA GA700 Technical Manual page 262

5.3 MEMOBUS/Modbus Communications
Error Code
Name
(Hex.)
22 Write Mode Error
DC Bus
23 Undervoltage Write
Error
Error Writing Data
24 during parameter
processing
Writing into
25
EEPROM disabled
■
Slave Non Reply
In the following cases, the slave ignores the command message from the master and sends no response message.
• When a communications error (overrun, framing, parity, CRC-16) is detected in the command message.
• When the slave address inside the command message and the slave address for the drive side do not match (the
slave address of the drive is set in H5-01 [Drive Node Address].
• When the time interval between the data of which the message is composed exceeds the 24 bit length
• When the data length for the command message is inaccurate
Note:
• When CALL [Serial Comm Transmission Error] appears on the keypad, refer to "Troubleshooting" to resolve the cause of the
abnormality, and try to execute communications again. If CALL does not appear on the keypad, check for the presence of an error and
the type of error in U1-19 [MEMOBUS/Modbus Error Code].
• When write function code is executed and when the slave address that is set inside the command message is 00 (Hex.), write is
executed by all slaves, but response messages are not sent to the master.
262
• Attempted to write a disabled parameter during run.
• When CPF06 [EEPROM Data Error] occurs, a parameter other than the following was
attempted to be written from the master.
– 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 Selection]
• Writes the read-only data.
During Uv [DC Bus Undervoltage], a Uv write disabled parameter was written.
Attempted to write a parameter from the master during parameter processing on the drive side.
EEPROM write was executed from the MEMOBUS/Modbus communications while writing into
EEPROM write is disabled. When this error occurs, a message is displayed and operation
continues.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Cause