Mitsubishi Electric 800 Series Instruction Manual (Function page 378

 3-wire type (STF signal, STR signal, STP (STOP) signal)
• The following figure shows the 3-wire type connection.
• The self-holding function is enabled when the STP (STOP) signal is turned ON. In such case, the forward/reverse signal
is simply used as a start signal. (The STP (STOP) signal can be input via an external terminal only.)
• For the STP (STOP) signal, set "25" in any parameter from Pr.178 to Pr.184 (Input terminal function selection) to assign
the function.
• Even if a start signal (STF or STR) is turned ON and then OFF, the start command remains valid and the motor operation
continues. To change the rotation direction, turn the STR (STF) signal ON once and then OFF.
• In order to decelerate the motor to a stop, turn OFF the STP (STOP) signal once.
Forward
Stop
rotation start
Reverse
rotation start
ON
STF
STR
STP (STOP) ON
3-wire type connection example (Pr.250 = "9999")
NOTE
• When the JOG operation is enabled by turning ON the JOG signal, the STP (STOP) signal will be disabled.
• Even when the output is stopped by turning ON the MRS signal, the self-holding function is not canceled.
 Start signal selection
STF STR
OFF OFF
OFF ON
ON OFF
ON ON
Parameters referred to
Pr.4 to Pr.6 (multi-speed setting)page 273
Pr.178 to Pr.189 (Input terminal function
STF
Inverter
STR
STP (STOP)
SD
Time
ON
OFF OFF
Pr.250 setting and inverter condition
0 to 100 s, 9999
Stop
Reverse rotation
Forward rotation
Stop
selection)page 368
Stop
Start
Forward rotation
/reverse rotation
ON
STF
STR
STP (STOP) ON
3-wire type connection example (Pr.250 = "8888")
1000 to 1100 s, 8888
Stop
Forward rotation
Reverse rotation
14. (T) Multi-Function Input Terminal Parameters
STF
Inverter
STP (STOP)
STR
SD
ON
ON
OFF OFF
14.9 Start signal operation selection
11
12
13
14
15
16
17
18
Time
19
20
377