Mitsubishi Electric FR-D720-070 Instruction Manual page 123

Function assignment of external terminal and control
(2) Three-wire type (STF, STR, STOP signal)
The three-wire connection is shown below.
Turning the STOP signal ON makes start self-holding function valid. In this case, the forward/reverse rotation signal
functions only as a start signal.
If the start signal (STF or STR) is turned ON and then OFF, the start signal is held and makes a start. When changing the
direction of rotation, turn STR (STF) ON once and then OFF.
To stop the inverter, turning OFF the STOP signal once decelerates it to a stop.
When using the STOP signal, set "25" in any of Pr.178 to Pr.182 to assign function.
Forward
Stop
rotation start
STF
Inverter
Reverse
rotation start
STR
STOP
SD
Forward
rotation
Reverse
rotation
ON
STF
ON
STR
STOP ON
OFF
3-wire connection example (Pr. 250 = "9999")
REMARKS
When the JOG signal is turned ON to enable Jog operation, the STOP signal becomes invalid.
If the MRS signal is turned ON to stop the output, the self-holding function is not canceled.
(3) Start signal selection
STF STR
0 to 100s, 9999
OFF OFF
OFF ON Reverse rotation
ON OFF Forward rotation
ON ON
Parameters referred to
Pr. 4 to Pr. 6 (multi-speed setting) Refer to page 89
Pr. 178 to Pr. 182 (input terminal function selection)
118
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Stop
Forward rotation
/reverse rotation
Forward
rotation
Time
Reverse
rotation
ON
STF
STR
STOP ON
OFF
3-wire connection example (Pr. 250 = "8888")
Pr. 250 Setting Inverter Status
1000s to 1100s 8888
Stop
Stop
Forward rotation
Stop Reverse rotation
Refer to page 113
Start
STF
Inverter
STOP
STR
SD
Time
ON
ON
OFF OFF