Inverter Output Shutoff - Mitsubishi Electric 800 Series Instruction Manual

12.7

Inverter output shutoff

The inverter output can be shut off with the MRS signal. The logic of the MRS signal can also be selected.
Pr. Name
17 MRS/X10 terminal input
T720 selection
*1 Refer to page 386 for the details of the X10 signal.
 Output shutoff signal (MRS signal)
Output frequency
ON
MRS signal
STF (STR)
ON
signal
• When the Output stop (MRS) signal is turned ON while operating the inverter, the inverter output is instantaneously shut
off.
• To input the MRS signal, set "24" in any parameter from Pr.178 to Pr.189 (Input terminal function selection) to assign
the function.
• The response time of the MRS signal is within 2 ms.
• The MRS signal is used in the following cases.
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 or 3", the input specification of the MRS signal is changed to normally closed (NC contact). The inverter
will shut off the output when the MRS signal is turned OFF (when the contact is opened).
Initial
Setting range
value
0
1
2
3
0
4
5
Setting value "0"
Motor coasts
to stop
Time
MRS signal input
Normally open input
Normally closed input (NC
contact input specification)
External terminal: Normally
closed input (NC contact input
specification)
Communication: Normally open
input
(Initial
Setting value "2"
value)
Inverter Inverter
MRS MRS
SD (PC) SD (PC)
Description
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.
12. (T) Multi-Function Input Terminal Parameters
Description
*1
X10 signal input
Normally open input
Normally closed input (NC
contact input specification)
Normally open input
Normally closed input (NC
contact input specification)
Normally open input
Normally closed input (NC
contact input specification)
12.7 Inverter output shutoff
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