Function assignment of external
terminal and control
(2) Response time of each signal
The response time of the X10 signal is within 2ms. However, when the X10 signal is not assigned at the Pr. 30
Regenerative function selection setting of "2" (FR-HC/MT-HC/FR-CV connection), the response time of the MRS
signal is within 2ms.
Pr. 17 MRS input selection is made invalid.
Other than 2
4.10.2 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.
MRS input selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 173)
Setting value "0"
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.
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)
(1) Output shutoff signal (MRS signal)
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
(b) To provide interlock to disable operation by the inverter
(c) Coast the motor to a stop.
Setting value "2"
(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
Refer to page 110
Open input always
Close input always (NC contact input specifications)
The inverter output is shut off when the mechanical brake
With the MRS signal on, the inverter cannot be operated if the
start signal is entered into 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.