Inverter Output Shutoff Signal - Mitsubishi Electric FR-A820-00046 Instruction Manual

Parameters
5.12.9

Inverter output shutoff signal

The inverter output can be shut off with the MRS signal. The logic of the MRS signal can also be se-
lected.
Pr.
17
T720
About output shutoff signal (MRS signal)
● When the Output stop (MRS) signal is turned ON while operating the inverter, inverter output is
instantaneously shut off.
● The response time of the MRS signal is within 2 ms.
MRS signal
STF (STR)
signal
● Terminal MRS may be used as described below.
– To use a mechanical brake (e.g. electromagnetic brake) to stop the motor
The inverter output is shut off when the mechanical brake operates.
– To provide interlock to disable operation by the inverter
With the MRS signal ON, the inverter cannot be operated even if the start signal is entered into
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.
MRS signal logic inversion (Pr. 17 = "2")
When Pr.17 = "2", the MRS signal can be changed to normally closed (NC contact) specification. The in-
verter will shut off the output with MRS signal turned ON (opened).
Setting value "0" *
Output
stop
* Initial value
FR-A800
Name
MRS input selection
Motor coasts
to stop
Time
ON
ON
Setting value "2"
Output
stop
MRS
PC PC
(T) Multi-Function Input Terminal Parameters
Initial Setting
Description
value range
0 Normally open input
Normally closed input
2
(NC contact input specification)
0
External terminal: Normally closed input
(NC contact input specification)
4
Communication: Normally open input
Fig. 5-213:
Output shutoff signal
Fig. 5-214:
Connection of the MRS terminal in source logic
MRS
I002653E
I002772E_G
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