Mitsubishi FR-A800

(T) Multi-Function Input Terminal Parameters
436
PARAMETERS
5.12.11 Start signal operation selection
2-wire type (STF, STR signal)
• The following figure shows the connection in 2-wire type.
• As an initial setting, 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 perform a deceleration stop when both are turned
OFF (or both are turned ON) during the operation.
• There are methods such as inputting 0 to 10 VDC between the speed setting input terminals 2 and 5, or Pr.4 to Pr.6 multi-
speed setting (fast, medium, slow) for the frequency setting signal. (For multi-speed operation, refer to page 328.)
• By setting Pr.250 = "1000 to 1100, 8888", STF signal becomes start command and STF signal becomes forward/reverse
command.
NOTE
• By setting Pr.250 = "0 to 100, 1000 to 1100", it will perform coast to stop when the start command is turned OFF. (Refer to
page 613.)
• The STF and STR signals are assigned to the terminals STF and STR in the initial status. STF signal can be assigned to a
terminal by Pr.178 STF terminal function selection, and STR signal can be assigned to a terminal by Pr.179 STR terminal
function selection.
Operation of start signal (STF/STR) can be selected.
Select the stopping method (deceleration to 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 Initial value Setting range
Description
Start signal (STF/STR)
Stop operation
(Refer to page 613.)
250
G106
Stop
selection
9999
0 to 100 s
STF signal: Forward rotation start
STR signal: Reverse rotation start
Turn OFF the start signal and it
will coast to stop after the
specified time period.
When set to 1000 s to 1100 s, it
will coast to stop after
(Pr.250 - 1000) s.
1000 s to 1100 s
STF signal: Start signal
STR signal: Forward/reverse
rotation signal
9999
STF signal: Forward rotation start
STR signal: Reverse rotation start
It will perform deceleration stop
when the start signal is turned
OFF.
8888
STF signal: Start signal
STR signal: Forward/reverse
rotation signal
2-wire type connection example (Pr.250 = "9999")
2-wire type connection example (Pr.250 = "8888")
Forward
rotation start
Reverse
rotation start
STF
ON
Time
STF
STR
SD
Inverter
STR
ON
10
2
5
Output frequency
Forward rotation
Reverse rotation
Start signal
Forward/
reverse
signal
STF
ON
Time
STF
STR
SD
Inverter
STR
ON
10
2
5
Output frequency
Forward rotation
Reverse rotation