Справочник Пользователя для Mitsubishi Electronics FR-D720-008
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Function assignment of external terminal and control
4.10.3 Condition selection of function validity by second function selection signal (RT)
When the RT signal turns ON, the second function becomes valid.
For the RT signal, set "3" in any of Pr. 178 to Pr. 182 (input terminal function selection) to assign the function.
The second function has the following applications.
For the RT signal, set "3" in any of Pr. 178 to Pr. 182 (input terminal function selection) to assign the function.
The second function has the following applications.
(a) Switching between normal use and emergency use
(b) Switching between heavy load and light load
(c) Changing of acceleration/deceleration time by broken line acceleration/deceleration
(d) Switching of characteristic between the main motor and sub motor
(b) Switching between heavy load and light load
(c) Changing of acceleration/deceleration time by broken line acceleration/deceleration
(d) Switching of characteristic between the main motor and sub motor
You can select the second function using the RT signal.
Second function connection diagram
Second acceleration/deceleration time
Function
First Function
Parameter Number
Second Function
Parameter Number
Refer to
Page
Torque boost
Pr. 0
Pr. 46
Base frequency
Pr. 3
Pr. 47
Acceleration time
Pr. 7
Pr. 44
Deceleration time
Pr. 8
Pr. 44, Pr. 45
Electronic thermal O/L relay
Pr. 9
Pr. 51
Stall prevention
Pr. 22
Pr. 48
Applied motor
Pr. 71
Pr. 450
NOTE
When the RT signal is ON, the above second function is selected at the same time.
Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Make setting after confirming the function of each terminal.
Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Make setting after confirming the function of each terminal.
Parameters referred to
Pr. 178 to Pr. 182 (input terminal function selection)
STF(STR)
SD
Inverter
Start
Second function
selection
RT
High speed
RH
Middle speed
RM
RT
Output frequency
Acceleration time
is reflected
is reflected
Time
RH
RM