Mitsubishi Electric 800 Series Instruction Manual page 347

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.
Pr.
17 MRS input selection
T720
 About output shutoff signal (MRS signal)
Output frequency
MRS signal
STF (STR)
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.
Application
To stop the motor using a mechanical brake
(e.g. electromagnetic brake)
To provide interlock to disable the motor
operation by the inverter
To coast the motor to a stop
 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).
346
5. PARAMETERS
5.9 (T) Multi-Function Input Terminal Parameters
Name Initial value
0
Motor coasts
Setting value "0"
to stop
Time
ON
ON
The inverter output is shut off when the mechanical brake operates.
With the MRS signal ON, the motor cannot be driven by the inverter even if the start signal
is input to the inverter.
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.
Setting range
0
2
4
(Initial
Setting value "2"
value)
Inverter Inverter
MRS MRS
SD (PC) SD (PC)
Description
Description
Normally open input
Normally closed input (NC contact
input specification)
External terminal: Normally closed
input (NC contact input specification)
Communication: Normally open input