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Chapter 4 - Parameter Description [I/O]
73
This code sets the communication speed. This is
used in communication between inverter and
communication board.
I/O-48: Operating at Loss of Freq. Reference
I/O-49: Waiting Time after Loss of Freq. Reference
There are two kinds of loss of frequency reference.
One is the loss of digital frequency reference and
the other is of analog frequency reference.
Loss of digital frequency reference is applied
when DRV-04 [Frequency Mode] is set to
‘Keypad-1’ or ‘Kepad-2’. At this time, the ‘Loss’
means the communication error between inverter
and keypad or communication board during the
time set in I/O-49.
Loss of analog frequency reference is applied
when DRV-04 [Frequency Mode] is set to other
than ‘Keypad-1’ or ‘Kepad-2’. At this time, the
‘Loss’ is determined by the criteria set in I/O-11
[Criteria for Analog Input Signal Loss].
Setting Range
Select Display
Description
None
0
Inverter keeps on operating at the
previous frequency.
FreeRun
(Coast to stop)
1
Inverter cuts off its output.
Stop
2
Inverter stops with Decel time (DRV-
02) and Decel pattern (FU1-26).
This is the time inverter determines whether there
is a frequency reference or not. If there is no
frequency reference satisfying I/O-11 during this
time, inverter determines that it has lost of
frequency reference.
I/O-50: Communication Protocol Selection
This code selects the RS485 protocol between
inverter and computer.
Setting Range
Select Display
Description
CMC-Bus
ASCII
0
8 bit Data, No Parity, 1 Stop
Modbus RTU
7
8 bit Data, No Parity, 2 Stop
I/O-99: Return Code (7-Segment Keypad)
This code is used to exit a group. Press [FUNC]
key to exit.
Related Functions: DRV-04 [Frequency Mode]
I/O-11 [Criteria for Analog Signal Loss]