Operation Condition Selection Of Second Function Selection Signal (Rt) (Terminal Rt, Pr. 155) - Mitsubishi Electric FR-F740-00023-EC Instruction Manual

3.9.3 Operation condition selection of second function selection signal (RT)
(Terminal RT, Pr. 155)
You can select the second function using the external terminal (RT signal).
You can also set the RT signal operation condition (reflection time).
Parameter
Name
Number
RT signal reflection time
155
selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 146)
⋅ When the RT signal turns on, the second function becomes valid.
⋅ 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 main motor and sub motor
Second function
connection diagram
Inverter
Start STF(STR)
Second
function
RT
selection
RH
High speed
RM
Middle speed
PC
⋅ Functions that can be set as second functions
Function
Torque boost
Base Frequency
Acceleration time
Deceleration time
Electronic thermal relay function
Stall prevention
REMARKS
⋅ The RT signal is assigned to the RT terminal in the initial setting. By setting "3" to any of Pr. 178 to Pr. 189 (input terminal function
selection), the RT signal can be assigned to the other terminal.
CAUTION
⋅ When the RT signal is on, the other functions such as the second acceleration/deceleration time are also selected.
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Please
make setting after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 178 to Pr.189 (input terminal function selection)
Initial Value Setting Range
0
10
Second acceleration/deceleration time example
Setting value "0" (initial value)
Acceleration
time is reflected
RT
RH
RM
First Function Second Function
Parameter Number Parameter Number
Pr. 0
Pr. 3
Pr. 7
Pr. 8 Pr. 44, Pr. 45
Pr. 9
Pr. 22 Pr. 48, Pr. 49
Refer to page 90
Function assignment of external
Second function is immediately made valid with on of
0
the RT signal.
These functions are valid only during the RT siganl is
on and constant speed operation.
(invalid during acceleration/deceleration)
Time
Refer to
Page
Pr. 46 57
Pr. 47 68
Pr. 44 79
79
Pr. 51 83
60
terminal and control
Description
Pr.154
page 60
Pr.156
page 60
3
93