Fuji Electric FRENIC-Ace series, User Manual

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5.3 Description of Function Codes
5-279
FU
NCT
IO
N
C
O
DE
S
Chap 5
■
Stop bit selection (y07, y17)
Sets the stop bit.
• 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
station within a specific time) during the operation using the
RS-485 communication, until the time when the system
processes the communication errors.
For details on processing communication errors, refer to y02
and y12.
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-RS-485 converter).
(Some converters monitor communication status and switch transmission and 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
Host device
Request
Inverter
Response
T1