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7 Detailed Functions
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
7-5 Multi-function Terminal Functions (Group C)
7
• Use this function to change the inverter output frequency via the multi-function input terminals UP
and DWN.
• Set the Multi-function Input terminals S1 to S8 Selection (C001 to C008) to 27 (UP) and 28 (DWN).
• This function is enabled only when the Frequency Reference Selection (A001) is set to 01 or 02.
However, the setting 01 (Terminal) is effective only for multi-step speed operation.
It is not effective when using an external analog input for the frequency reference or when setting the
jogging operation frequency.
• The acceleration/deceleration time when the UP/DWN terminal is ON depends on the F002,
F003/F202, F203/F302, and F303 settings. To enable the switching to the 1st/2nd/3rd control,
allocate one of the Multi-function Input S1 to S8 Selection (C001 to C008) to 08 (SET) or 17 (SET3)
and turn ON the terminal SET/SET3.
Precautions for Correct UsePrecautions for Correct Use
Do not turn ON/OFF the terminal UP/DWN after turning off the power supply. Otherwise, the
inverter may not store data normally.
Up/Down Function (UP, DWN, UDC)
Parameter No. Function name Data Default data Unit
C001 to C008
Multi-function Input S1 to
S8 Selection
27: UP (Remote operation
acceleration)
28: DWN (Remote operation
deceleration)
29: UDC (Remote data clear)
––
Data Symbol Function name Status Description
27 UP
Remote operation
acceleration
ON
Accelerates from the current speed
during the signal input period.
OFF Keeps the current speed.
28 DWN
Remote operation
deceleration
ON
Decelerates from the current speed
during the signal input period.
OFF Keeps the current speed.
29 UDC Remote data clear
ON Clears the stored UP/DWN speed.
OFF
Keeps the stored UP/DWN speed
unchanged.
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