5.3 Description of Function Codes 5.3.12 y codes (Link functions)
Communications error processing (y02, y12)
Selects the operation when an error occurs during RS-485 communication.
RS-485 errors are logical errors such as address errors, parity errors and framing errors, as well as transmission
errors and disconnection errors set at y08/y18. These errors occur only when the inverter is configured to receive
the operation command or frequency command via the RS-485 communication. If the operation command or
frequency command is not issued via the RS-485 communication, or when the inverter is stopped, the system does
not determine an error.
Displays the RS-485 communication error (er8 for y02, erp for y12), and immediately
stops the operation (trip by alarm). Displays an RS-485 communication error (er8), and
immediately stops operation (alarm stop).
Operates for a period specified in the error process timer (y03, y13), and then displays
the RS-485 communication error (er8 for y02, erp for y12), and stops the operation
(trip by alarm).
Retries the communication for a period specified in the error process timer (y03, y13),
and if the communication is recovered, the operation continues. Displays the RS-485
communication error (er8 for y02, erp for y12) if the communication is not recovered,
and immediately stops the operation (trip by alarm).
Continues the operation if a communication error occurs.
Refer to the "RS-485 Communication User's Manual" for details.
Error process timer (y03, y13)
Sets the error process timer. An error is judged when the timer value set for which a response is required has
elapsed due to such reasons as no response from the other end. Refer to the "Communication time-out detection
timer (y08, y18)" item also.
• Data setting range: 0.0 to 60.0 (s)
Baud rate (y04, y14)
Data length selection (y05, y15)
Sets the character length.
• For Modbus RTU:
The value does not need to be set since it automatically
becomes 8 bits.
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