5-147
5.2.10 y codes (Link Functions)
y01 to y20 RS-485 Communication 1 and 2
Up to two ports of RS-485 communications link are available as listed below.
Port Route Function code Applicable equipment
Port 1
RS-485 communications link
(via the RJ-45 connector prepared for keypad connection)
y01 through y10
Standard keypad
FRENIC Loader
Host equipment
Port 2
RS-485 communications link
(via terminals DX+, DX- and SD on the control PCB)
y11 through y20 Host equipment
To connect any of the applicable devices, follow the procedures shown below.
(1) Standard keypad
The standard keypad allows you to run and monitor the inverter.
There is no need to set the y codes.
(2) FRENIC Loader
Connecting your computer running FRENIC Loader to the inverter via RS-485 communication (port 1), you can
monitor the inverter’s running status information, edit function codes, and test-run the inverters.
For the setting of y codes, refer to the descriptions of y01 to y10.
FRENIC-MEGA series of inverters has a USB port on the keypad.
To use the FRENIC Loader via the USB port, simply set the station address (y01) to "1" (factory default).
(3) Host equipment
The inverter can be managed and monitored by connecting host equipment such as a PC and PLC to the inverter.
Modbus RTU* and Fuji general-purpose inverter protocol are available for communications protocols.
* Modbus RTU is a protocol established by Modicon, Inc.
For details, refer to the RS-485 Communication User's Manual.
Station address (y01 for port 1 and y11 for port 2)
y01 or y11 specifies the station address for the RS-485 communications link. The table below lists the protocols and the
station address setting ranges.
Protocol Station address Broadcast address
Modbus RTU protocol 1 to 247 0
FRENIC Loader protocol 1 to 255 None
FUJI general-purpose inverter protocol 1 to 31 99
- If any wrong address beyond the above range is specified, no response is returned since the inverter will be unable to
receive any enquiries except the broadcast message.
- To use FRENIC Loader via the RS-485 communications link (port 1), set the station address that matches the
connected computer.
Communications error processing (y02 for port 1 and y12 for port 2)
y02 or y12 specifies the error processing to be performed if an RS-485 communications error occurs.
RS-485 communications errors include logical errors (such as address error, parity error, framing error), transmission
protocol error, and physical errors (such as no-response error specified by y08 and y18). 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 none of run and frequency commands is sourced through the RS-485 communications link or
the inverter is not running, the inverter does not recognize any error occurrence.
Data for y02, y12 Function
0
Immediately trip, displaying an RS-485 communications error (
er8
for y02 and
erp
for y12). (The inverter stops with alarm issue.)
1
Run during the period specified by the error processing timer (y03, y13), display an RS-485
communications error (
er8
for y02 and
erp
for y12), and then stop operation. (The
inverter stops with alarm issue.)
2
Retry communication during the period specified by the error processing timer (y03, y13).
If a communications link is recovered, continue operation. Otherwise, display an RS-485
communications error (
er8
for y02 and
erp
for y12) 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.
To Next Page
Loading...
