Inverter Output Shutoff Signal (Mrs Signal, Pr. 17) - Mitsubishi Electric FR-F740-00023-EC Instruction Manual

Function assignment of external
terminal and control
3.9.2

Inverter output shutoff signal (MRS signal, Pr. 17)

The inverter output can be shut off from the MRS signal. The logic of the MRS signal can also be selected.
Pr.16
page 74
Pr.18 Parameter
page 66
Number
17 MRS input selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 146)
MRS signal
STF (STR)
signal
Setting value "0"
Inverter
Output
stop
MRS
PC
REMARKS
⋅ The MRS signal is assigned to the terminal MRS in the initial setting. By setting "24" in any of Pr. 178 to Pr. 189 (input terminal
function selection), the RT signal can be assigned to the other terminal.
⋅ The MRS signal can shut off the output, independently of the PU, external or network operation mode.
CAUTION
⋅ Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Please
make setting after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 178 to Pr. 189 (Input terminal function selection)
92
Initial
Name
Value
Motor coasts
to stop
Time
ON
ON
(Initial
Setting value "2"
value)
Inverter
Output
stop
MRS
PC
Setting
Range
0 Open input always
0
2 Close input always (NC contact input specifications)
(1) Output shutoff signal (terminal MRS)
⋅ Turning on the output shutoff signal (MRS) during inverter running
shuts off the output immediately.
⋅ Terminal MRS may be used as described below.
(a) When mechanical brake (e.g. electromagnetic brake) is used to
stop motor
The inverter output is shut off when the mechanical brake
operates.
(b) To provide interlock to disable operation by the inverter
With the MRS signal on, the inverter cannot be operated if the
start signal is entered into the inverter.
(c) 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.
(2) MRS signal logic inversion (Pr. 17)
⋅ When Pr. 17 is set to "2", the MRS signal (output stop) can be
changed to the normally closed (NC contact) input specification.
When the MRS signal turns on (opens), the inverter shuts off the
output.
Refer to page 90
Description