Communication Error Codes - Omron VARISPEED L7 Manual

Communication Error Codes

The following table shows MEMOBUS communications error codes.
Error Code
Function code error
01H
A function code other than 03H, 08H, or 10H has been set by the PLC.
Invalid register number error
02H
• The specified register address does not exist.
• With broadcast sending, a start address other than 0001H, or 0002H has been set.
Invalid quantity error
03H
• The number of data packets (register content) being read or written is outside the range of 1 to 16.
• In write mode, the number of data bytes in the message is not No. of packets x 2.
Data setting error
21H
• A simple upper limit or lower limit error has occurred in the control data or when writing parameters.
• When writing parameters, the parameter setting is invalid.
Write mode error
• Attempting to write parameters to the inverter during operation.
• Attempting to write via ENTER commands during operation.
22H
• Attempting to write parameters other than A1-00 to A1-05, E1-03, or 02-04 when warning alarm CPF03 (defec-
tive EEPROM) has occurred.
• Attempting to write read-only data.
Writing during DC bus undervoltage (UV) error
23H
• Writing parameters to the inverter during UV (DC bus undervoltage) alarm.
• Writing via ENTER commands during UV (DC bus undervoltage) alarm.
Writing error during parameters processing
24H
Attempting to write parameters while processing parameters in the Inverter.
Slave Not Responding
In the following cases, the slave ignores the write function.
When a communications error (overrun, framing, parity, or CRC-16) is detected in the command message.
•
When the gap between two blocks (8 bit) of a message exceeds 24 bits.
•
When the command message data length is invalid.
•
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