5.3 Description of Function Codes
5-279
FUNCTION CODES
Chap 5
■ Stop bit selection (y07, y17)
For inverter supporting loader (via RS-485):
The value does not need to be set since it automatically
becomes 1 bit.
For Modbus RTU: The value does not need to be set since it
is automatically determined in conjunction with the parity bit
(function y06, y16).
y07 and y17 data Function
0 2 bits
1 1 bit
■ Communication time-out detection timer (y08, y18)
Sets a period from the time when the system detects
communication time
-out (for any reason such as
disconnection in equipment that
periodically access to the
within a specific time) during the operation using the
-485 communication, until the time when the system
processes the communication errors.
sing communication errors, refer to y02
y08 and y18 data Function
0
Disconnection is not
detected.
1 to 60
Detection time from 1 to
60 (s)
■ Response interval time (y09, y19)
Sets a period from the time when the system receives a request from host equipment (upper equipment such as
computer or PLC) until the time when it returns a response. In case of the host equipments that are slow to process
the task from completed transmission to completed reception preparation, a timing can be synchronized by setting
a response interval time.
• Data setting range: 0.00 to 1.00 (s)
T1 = Response interval time + α
α: Processing time inside the inverter. It varies depending on the timing and command.
For details, refer to the RS-485 Communication User’s Manual.
To set an inverter by the inverter supporting loader via the RS-485 communication, consider the
performance and condition of the computer and converter (such as USB
(Some converters monitor communication status and switch transmission a
nd reception with timer.)
■ Protocol selection (y10, y20)
Selects a communication protocol.
y10 and y20 data Function
0 Modbus RTU protocol
1 FRENIC Loader protocol
2 Fuji general-purpose inverter protocol
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