RS-485 User's Manual MEH448d - Fuji Electric America

2.4 Making RS-485-related Settings
2.4.1 Link function (RS-485 setting)
Use function codes (y01 to y10 and y11 to y20) to make settings for RS-485 communications
functions. Use the codes y01 to 10 for port 1 and the codes y11 to 20 for port 2.
Station address (y01, y11)
Set a station address for RS-485 communications. The setting range depends on the protocol.
Table 2.7 RS-485 setting (station addresses)
Protocol Range Broadcast
Modbus RTU protocol 1 to 247 0
Protocol for loader commands 1 to 255 −
Fuji general-purpose inverter protocol 1 to 31 99
- No response is expected if an address number out of the specified range is set.
- Match the station address with that of the personal computer when FRENIC Loader
is connected.
Operation made selection when an error occurs (y02, y12)
Set the operation performed when an RS-485 communications error occurs.
RS-485 communications errors are logical errors such as an address error, parity error, or
framing error, transmission error, and communications disconnection error set by y08 and y18.
In any case, error is detected only while the inverter is running in the link operation made for
both the operation command and frequency setting. If neither the operation command nor
frequency setting is sent through RS-485 communications or the inverter is not running, error is
ignored.
Table 2.8 RS-485 setting (operations when an error has occurred)
y02, y12 data Function
0 Indicates an RS-485 communications error (er8 for port 1 and erp for port
2), and stops operation immediately (alarm stop).
1 Runs during the time set on the error processing timer (y03, y13), and then
displays an RS-485 communications error (er8 for port 1 and erp for port 2)
and stops operation (alarm stop).
2 Runs during the time set on the error processing timer (y03, y13). If
communications are recovered, continues operation. Otherwise, displays an
RS-485 communications error (er8 for port 1 and erp for port 2) and stops
operation (alarm stop).
3 Continues operation even after a communications error has occurred.
Timer for y02 and y12 (y03, y13)
Set a timer for error detection.
It is judged as an error that the response to a request is not received within time set because of
no response of the other end and so on. See the section of "Communications disconnection
detection time (y08, y18)."
- Data input range: 0.0 to 60.0 (s)
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