Selecting The Condition To Activate The Second Function Selection (Rt) Signal - Mitsubishi Electric 800 Series Instruction Manual

12.8
Selecting the condition to activate the Second
function selection (RT) signal
The second function can be selected using the RT signal.
• Turning ON the Second function selection (RT) signal enables the second functions. For the RT signal, set "3" in any
parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign the function.
• The following are the examples of the applications of the second functions.
Switching between regular use and emergency use
Switching between heavy load and light load
Changing the acceleration/deceleration time by break point acceleration/deceleration
Switching characteristics of main motor and sub motor
Connection diagram example for the second
function
Start
Second function selection
High speed
Middle speed
• When the RT signal is ON, second functions are selected. The following table shows the functions which can be changed
to the second function.
Function
Torque boost
Base frequency
Acceleration time
Deceleration time
Electronic thermal
O/L relay
Stall prevention
*1
Applied motor
*1
Motor constant
Speed control gain (Advanced
*1
magnetic flux vector)
*1
Offline auto tuning
*1
Online auto tuning
*1
Motor control method
Speed control gain
Analog input filter
Torque control gain
*1 The function can be changed by switching the RT signal ON/OFF while the inverter is stopped. If a signal is switched during operation, the
operation method changes after the inverter stops. (Pr.450 ≠ 9999)
298
12.(T) Multi-Function Input Terminal Parameters

12.8 Selecting the condition to activate the Second function selection (RT) signal

Example of the second acceleration/deceleration time
Inverter
STF/STR
RT
RH
RM
RT
SD
RH
RM
First function parameter
number
Pr.0 Pr.46
Pr.3 Pr.47
Pr.7 Pr.44
Pr.8 Pr.44, Pr.45
Pr.9 Pr.51
Pr.22 Pr.48
Pr.71 Pr.450
Pr.80 to Pr.84, Pr.90 to
Pr.94, Pr.298, Pr.702,
Pr.453 to Pr.462, Pr.560,
Pr.706, Pr.707, Pr.711,
Pr.738 to Pr.746, Pr.860,
Pr.712, Pr.717, Pr.721,
Pr.1413
Pr.724, Pr.725, Pr.859,
Pr.1412
Pr.89 Pr.569
Pr.96 Pr.463
Pr.95 Pr.574
Pr.800 Pr.451
Pr.820, Pr.821 Pr.830, Pr.831
Pr.822, Pr.826 Pr.832, Pr.836
Pr.824, Pr.825 Pr.834, Pr.835
Acceleration
time is applied
Time
Second function parameter
number
Refer to page
384
386
164
164
206
222
304
309, 318
92
309, 318
325
88
109
280
124