Mitsubishi Electric 800 Series Instruction Manual (Function page 479

• For the X13 signal input, set "13" in any parameter from Pr.178 to Pr.189 to assign the function.
NOTE
• Under Real sensorless vector control, when the X13 signal turns ON while Pr.11 = "8888", the zero speed control is activated
regardless of the Pr.850 Brake operation selection setting.
• Under Vector control, zero speed control or servo lock starts depending on the setting of Pr.802.
• When the X13 signal is turned ON while online auto tuning is performed at startup, DC injection brake (zero speed control /
servo lock) will start after the tuning is completed.
 Setting of operation voltage (torque) (Pr.12)
• Set the percentage against the power supply voltage in Pr.12 DC injection brake operation voltage. (The setting is not
used for zero speed control or servo lock.)
• The DC injection brake operation is not available when the setting of Pr.12 is 0%. (The motor starts to coast when the
output frequency drops to the Pr.10 setting or lower at a stop.)
• The Pr.12 setting is disabled under PM sensorless vector control.
NOTE
• When the setting of Pr.12 is the initial value, the setting corresponding to the motor is set according to the Pr.71 Applied motor
setting. (Refer to
as shown below.
3.7 kW or lower
5.5 kW, 7.5 kW
11 kW or higher
• Even if the setting value of Pr.12 is made larger, braking torque will be limited so the output current will be within the rated
current of the inverter.
 Braking operation selection under Real sensorless vector control (Pr.850
= "0 or 1")
• The braking operation under Real sensorless vector control can be selected between the DC injection brake operation
(initial setting) and zero speed control.
By setting Pr.850 Brake operation selection = "1", zero speed control will be performed at the frequency set in Pr.10 DC
injection brake operation frequency or lower.
NOTE
• Under Real sensorless vector control, when the X13 signal turns ON while Pr.11 = "8888", the zero speed control is activated
regardless of the Pr.850 setting.
• When restarting the operation after a brake operation under Real sensorless vector control, set Pr.850 = "1" (zero speed
control). Setting "0" (DC injection brake) may cause a delay of about 2 seconds from the time the start up command is input
until it actually is output.
478
17. (G) Control Parameters
17.6 DC injection brake, zero speed control, servo lock, and magnetic flux decay output shutoff
When Pr. 11 = "8888"
Pr.12
DC injection
brake voltage
X13 signal
STF
page 383.) However, when an energy saving motor (SF-HR or SF-HRCA) is used, change the Pr.12 setting
Motor capacity
Time
Time
ON ON OFF
ON
Pr.12 setting
4%
3%
2%