Condition Selection Of Function Validity By Second Function Selection Signal (Rt) - Mitsubishi Electric FR-E720-008 Instruction Manual

4.11.3

Condition selection of function validity by second function selection signal (RT)

You can select the second function using the RT signal.
When the RT signal turns ON, the second function becomes valid.
For the RT signal, set "3" in any of Pr. 178 to Pr. 184 (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
Second function connection diagram
Start
Second function
selection
High speed
Middle speed
When the RT signal is ON, the following second function is selected at the same time.
Function
Torque boost
Base frequency
Acceleration time
Deceleration time
Electronic thermal O/L relay
Stall prevention
Applied motor
NOTE
Changing the terminal assignment using Pr. 178 to Pr. 184 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 178 to Pr. 184 (input terminal function selection)
Function assignment of external terminal and control
Inverter
STF(STR)
RT
RH
RM
SD
First Function Second Function
Parameter Number Parameter Number
Pr. 0
Pr. 3
Pr. 7
Pr. 8
Pr. 9
Pr. 22
Pr. 71
Refer to page 138
Second acceleration/deceleration time
RT
RH
RM
Refer to
Page
Pr. 46 83
Pr. 47 97
Pr. 44
108
Pr. 44, Pr. 45 108
Pr. 51 115
Pr. 48 91
Pr. 450 117
Acceleration time
is reflected
Time
141
4