Inverter Output Shutoff Signal (Mrs Signal, Pr. 17) - Mitsubishi Electric FR-E720-008 Instruction Manual

Function assignment of external terminal and control

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

The inverter output can be shut off by the MRS signal. Also, logic for the MRS signal can be selected.
Parameter
Number
17 MRS input selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 187)
The motor coasts to stop
ON
MRS signal
STF (STR)
ON
signal
Setting value "0"
(initial value)
Inverter
Output stop Output stop
MRS
SD
(3) Assign a different action for each MRS signal input from communication and external terminal
(Pr. 17 = "4")
When Pr. 17 is set to "4", the MRS signal from external terminal (output stop) can be changed to the normally closed (NC
contact) input, and the MRS signal from communication can be changed to the normally open (NO contact) input.
This function is useful to perform operation by communication with MRS signal from external terminal remained ON.
External MRS
OFF
OFF
ON
ON
REMARKS
For MRS signal, assign the function by setting "24" to any of Pr.178 to Pr.184 (Input terminal function selection). (For the standard
control circuit terminal model, the function is assigned to terminal MRS in the initial setting.)
When using an external terminal to input the MRS signal, the MRS signal shuts off the output in any of the operation modes.
NOTE
Changing the terminal assignment using Pr. 178 to Pr. 184 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 178 to Pr. 184 (input terminal function selection)
140
Name Initial Value
(1)
(a) When mechanical brake (e.g. electromagnetic brake) is used to stop
(b) To provide interlock to disable operation by the inverter
Time
(c) Coast the motor to a stop.
Setting value "2"
Inverter
(2)
MRS
SD
Communication MRS
OFF
ON
OFF
ON
Setting Range
0
2
0
4
Output shutoff signal (MRS signal)
Turning ON the output shutoff signal (MRS) during inverter running
shuts off the output immediately.
MRS signal may be used as described below.
motor
The inverter output is shut off when the mechanical brake operates.
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.
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.
0
Operation enabled
Output shutoff
Output shutoff
Output shutoff Operation enabled
Refer to page 138
Description
Normally open input
Normally closed input
(NC contact input specifications)
External terminal: Normally closed input
(NC contact input specifications)
Communication: Normally open input
Pr. 17 Setting
2
Output shutoff Output shutoff
Output shutoff Output shutoff
Output shutoff Operation enabled
Output shutoff
4