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5. PARAMETERS
5.9 (T) Multi-Function Input Terminal Parameters
5.9.9 Inverter output shutoff signal
The inverter output can be shut off with the MRS signal. The logic of the MRS signal can also be selected.
About output shutoff signal (MRS signal)
• When the Output stop (MRS) signal is turned ON while operating the inverter, the inverter output is instantaneously shut
off.
• The response time of the MRS signal is within 2 ms.
• Terminal MRS may be used as described below.
MRS signal logic inversion (Pr.17 = "2")
• When Pr.17 = "2", the MRS signal can be changed to normally closed (NC contact) specification. The inverter will shut off
the output with MRS signal turned OFF (opened).
Pr. Name Initial value Setting range Description
17
T720
MRS input selection 0 0 Normally open input
2 Normally closed input (NC contact
input specification)
4 External terminal: Normally closed
input (NC contact input specification)
Communication: Normally open input
Application Description
To stop the motor using a mechanical brake
(e.g. electromagnetic brake)
The inverter output is shut off when the mechanical brake operates.
To provide interlock to disable the motor
operation by the inverter
With the MRS signal ON, the motor cannot be driven by the inverter even if the start signal
is input to the inverter.
To coast the motor to a stop When the start signal is turned OFF, the inverter decelerates the motor to a stop in the preset
deceleration time, but when the MRS signal is turned ON, the motor coasts to a stop.
ON
ON
MRS signal
STF (STR)
signal
Motor coasts
to stop
Output frequency
Time
(Initial
value)
MRS
SD (PC)
Inverter
MRS
SD (PC)
Inverter
Setting value "0"
Setting value "2"
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