Start Signal Operation Selection - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

*2 When the RT signal is OFF, the first function is valid. When it is ON, the second function is valid.
NOTE
• The RT signal is assigned to terminal RT in the initial status. By setting "3" in any of Pr.178 to Pr.189 (Input terminal function
selection), the RT signal can be assigned to the other terminal.
• When both the RT and X9 signals are ON, the X9 signal (third function) is valid.
• Changing the terminal assignment using Pr.178 to Pr.189 (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.189 (Input terminal function

5.12.11 Start signal operation selection

Operation of the start signal (STF/STR) can be selected.
Select the stopping method (deceleration stop or casting) at turn-OFF of the start signal.
Use this function to stop a motor with a mechanical brake at turn-OFF of the start signal.
Pr. Name
250
Stop selection
G106
 2-wire type (STF signal, STR signal)
• The following figure shows the 2-wire type connection.
• As an initial setting, the forward/reverse rotation signals (STF/STR) acts as both start and stop signals. Either one turned
ON will be enabled, and the operation will follow that signal. The motor will decelerate to a stop when both are turned OFF
(or both are turned ON) during the operation.
• The frequency can be set by inputting 0 to 10 VDC between the speed setting input terminals 2 and 5, or with Pr.4 to Pr.6
Multi-speed setting (high speed, middle speed, and low speed). (For the multi-speed operation, refer to
• By setting Pr.250= "1000 to 1100, 8888", the STF signal input becomes the start command and the STR signal input
becomes the forward/reverse command.
Forward
rotation start
Reverse
rotation start
STF
STR
2-wire type connection example (Pr.250 = "9999")
502
5. PARAMETERS
5.12 (T) Multi-function input terminal parameters
selection)page 496
Initial value Setting range
0 to 100 s
1000 to 1100 s
9999
9999
8888
STF
Inverter
STR
SD
10
2
5
ON
ON
Start signal (STF/STR)
STF signal: Forward rotation start
STR signal: Reverse rotation start
STF signal: Start signal
STR signal: Forward/reverse
rotation signal
STF signal: Forward rotation start
STR signal: Reverse rotation start
STF signal: Start signal
STR signal: Forward/reverse
rotation signal
Start signal
Forward/
reverse
signal
Time
STF
STR
2-wire type connection example (Pr.250 = "8888")
Description
Stop operation
(Refer to page
The motor coasts to a stop after a lapse
of the setting time when the start signal
is turned OFF.
When set to 1000 to 1100 s, the motor
will coast to stop after (Pr.250 - 1000) s.
The motor is decelerated to a stop
when the start signal is turned OFF.
STF
Inverter
STR
SD
10
2
5
ON
ON
688)
page 391.)
Time