Mitsubishi Electric 800 Series Instruction Manual (Function page 486

 When using the brake resistor (MYS type) at 100% torque, 6%ED (FR-
E820-0175(3.7K) only)
• Set Pr.30 = "1".
• Set Pr.70 = "6%".
 When using the high-duty brake resistor (FR-ABR) (FR-E820-0030(0.4K)
or higher, FR-E840-0016(0.4K) or higher, FR-E860-0017(0.75K) or higher,
and FR-E820S-0030(0.4K) or higher)
• Set Pr.30 = "1".
• Set Pr.70 = "10%".
 When the automatic restart after instantaneous power failure function is
enabled
• Set Pr.30 = "2" to enable the automatic restart after instantaneous power failure function when using the high-duty brake
resistor (FR-ABR), brake resistor (MRS, MYS type), brake unit (FR-BU2), multifunction regeneration converter (FR-XC),
power regeneration common converter (FR-CV), and high power factor converter (FR-HC2).
• Set Pr.70 as follows.
Option used
FR-ABR
MRS type, MYS type
MYS type (used at 100% torque / 6%ED)
FR-XC, FR-CV, FR-HC2, FR-BU2
• When using the FR-XC or FR-HC2, enable the automatic restart after instantaneous power failure function in both the FR-
XC/FR-HC2 and the inverter (Pr.57 Restart coasting time ≠ "9999").
• If the FR-XC or FR-HC2 detects the power failure during inverter running, the motor starts to coast since the Inverter
operation enable (RYB or RDY) signal turns ON. After the power is restored and the Inverter operation enable (RYB or
RDY) signal turns OFF, the inverter detects the motor speed (Pr.162 Automatic restart after instantaneous power
failure selection) and restarts operation.
 Logic reversing of the Inverter run enable signal (X10 signal, Pr.17)
• Use Pr.17 MRS/X10 terminal input selection to select the X10 signal input specification between normally open (NO
contact) and normally closed (NC contact). With the normally closed (NC contact) input specification, the inverter output is
shut off by turning OFF (opening) the X10 signal.
• Change the Pr.17 setting to change the inverter logic (NO/NC contact) according to the logic of the inverter operation
enable signal sent from the converter unit.
• The logic of the MRS signal can also be selected by setting Pr.17. Refer to
• The response time of the X10 signal is within 2 ms.
Pr.70 setting
10%
3%
6%
0%
Output frequency
X10 signal (Pr.17=0, 2, 4)
X10 signal (Pr.17=1, 3, 5)
Remarks
FR-E820-0030(0.4K) or higher
FR-E840-0016(0.4K) or higher
FR-E860-0017(0.75K) or higher
FR-E820S-0030(0.4K) or higher
FR-E820-0030(0.4K) or higher
FR-E840-0016(0.4K) or higher
FR-E860-0017(0.75K) or higher
FR-E820S-0030(0.4K) or higher
FR-E820-0175(3.7K)
—
page 372
Motor coasts to stop
Time
ON
OFF
to select the logic of the MRS signal.
17. (G) Control Parameters
17.8 Regenerative brake selection
11
12
13
14
15
16
17
18
19
20
485