9-120
Communications error processing (y02)
y02 specifies the error processing to be performed if an RS-485 communications error occurs.
RS-485 communications errors include logical errors (e.g., address error, parity error,
framing error), transmission protocol error, and physical errors (e.g., no-response error
specified by y08). The inverter can recognize such an error only when it is configured with a
run or frequency command sourced through the RS-485 communications link and it is
running. If not, the inverter does not recognize any error occurrence.
Data for y02 Function
0
Immediately trip, displaying an RS-485 communications error (
er8
for y02).
(The inverter stops with alarm issue.)
1
Run during the period specified by the error processing timer (y03), display an
RS-485 communications error (
er8
for y02), and then stop operation. (The
inverter stops with alarm issue.)
2
Retry communication during the period specified by the error processing timer
(y03). If a communications link is recovered, continue operation. Otherwise,
display an RS-485 communications error (
er8
for y02) and stop operation.
(The inverter stops with alarm issue.)
3 Continue to run even when a communications error occurs.
For details, refer to the RS-485 Communication User's Manual (MEH448).
Timer (y03)
y03 or y13 specifies an error processing timer.
When the specified timer count has elapsed due to no response from the other end when a
query has been issued, the inverter interprets it as an error occurrence. See the "No-response
error detection time (y08)" given later.
- Data setting range: 0.0 to 60.0 (s)
Baud rate (y04)
Data for y04 Transmission speed (bps)
0 2400
1 4800
2 9600
3 19200
y04 or y14 specifies the transmission speed
for RS-485 communication.
For FRENIC Loader (via the RS-485
communications link), specify the
transmission speed that matches the
connected computer.
4 38400
Data length (y05)
Data for y05 Data length
0 8 bits
1 7 bits
y05 or y15 specifies the character length for
RS-485 communication.
For FRENIC Loader (via the RS-485
communications link), no setting is required
since Loader automatically sets 8 bits. (The
same applies to the Modbus RTU protocol.)
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