Inverter Output Shutoff Signal (Mrs Signal, Pr. 17) - Mitsubishi Electric FR-F720-0.75K to 110K Instruction Manual

(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.
Pr. 30 MRS
Setting Assignment
×
2
×
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.
Parameter
Name
Number
17 MRS input selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 175)
Motor coasts
to stop
ON
MRS signal
STF (STR)
ON
signal
(Initial
Setting value "0"
value)
Inverter
Output Output
stop stop
MRS
SD
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)
Response Time
X10
Assignment
MRS
×
Within 2ms
⎯
Within 20ms
×
Within 20ms
⎯
Within 20ms
Initial
Value
0
(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
stop motor
The inverter output is shut off when the mechanical brake
Time
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.
Setting value "2"
When the start signal is turned off, the inverter decelerates the
motor to a stop in the preset deceleration time, but when the MRS
Inverter
signal is turned on, the motor coasts to a stop.
MRS
SD
(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 115
Function assignment of external
Pr. 17
X10
⎯
Invalid
⎯
Within 2ms
Within 2ms Valid
⎯
Valid
⎯ ⎯
⎯
Valid
Setting
Range
0 Open input always
2 Close input always (NC contact input specifications)
terminal and control
Description
4
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