Fuji Electric FRENIC-HVAC User Manual page 587

Parity check (y06 for port 1 and y16 for port 2)

y06 or y16 specifies the property of the
parity bit.
For FRENIC Loader, no setting is required
since Loader automatically sets the even
parity.
Stop bits (y07 for port 1 and y17 for port 2)

y07 or y17 specifies the number of stop bits.
For FRENIC Loader, no setting is required
since Loader automatically sets 1 bit.
For the Modbus RTU protocol, no setting is
required since the stop bits are automatically
determined associated with the property of
parity bits.
No-response error detection time (y08 for port 1 and y18 for port 2)

y08 or y18 specifies the timeout period for
receiving a response from the host
equipment (such as a computer or PLC) in
RS-485 communication, in order to detect
network breaks. This applies to the
machinery that accesses the host equipment
at the predetermined intervals.
If a response timeout occurs, the inverter
starts communications error processing.
For communications error processing,
refer to y02 and y12.
Response interval (y09 for port 1 and y19 for port 2)

y09 or y19 specifies the latency time after the end of receiving a query sent from the host
equipment (such as a computer or PLC) until the start of sending the response. This enables
the inverter to control the response timing to match the host equipment that is slow in
processing.
- Data setting range: 0.00 to 1.00 (s)
T1 = Response interval + α
where α is the processing time inside the inverter. α may vary depending on the
processing status and the command processed in the inverter.
 For details, refer to the RS-485 Communication User's Manual.
When configuring the inverter with FRENIC Loader via the RS-485
communications link, pay sufficient attention to the performance and
configuration of the PC and protocol converter such as USB−RS-485 converter.
Some protocol converters monitor the communications status and switch
between sending and receiving of transmission data with a timer.
6.3 Details of Function Codes
Data for
y06 and y16
0
1
2
3
Data for
y07 and y17
0
1
Data for
y08 and y18
OFF
1 to 60
6-277
Parity
None
(2 stop bits for Modbus RTU)
Even parity
(1 stop bit for Modbus RTU)
Odd parity
(1 stop bit for Modbus RTU)
None
(1 stop bit for Modbus RTU)
Stop bit(s)
2 bits
1 bit
No-response error detection
No detection
1 to 60 s