Mitsubishi Electric 800 Series Instruction Manual page 601

(G) Control parameters
• DC injection brake operation frequency will be fixed to 0 Hz at the time of PM sensorless vector control.
NOTE
• When executing pre-excitation (zero speed control) at the time of Real sensorless vector control, set Pr.10 DC injection
brake operation frequency to 0.5 Hz or lower since it may cause motor vibration, etc., at the time of deceleration stop.
• Initial value of Pr.10 will automatically switch to 0.5 Hz at the time of vector control.
Setting of operation time (X13 signal, Pr.11)
• Set the time applying the DC injection brake (zero speed control and servo lock) to Pr.11 DC injection brake operation
time.
• When the motor does not stop due to large load moment (J), increasing the setting produces an effect.
• When Pr.11 = "0 s", DC injection brake (zero speed control and servo lock) will not operate. (The motor will coast to stop.)
• When Pr.11 = "8888", DC injection brake (zero speed control and servo lock) will operate when the X13 signal is turned
ON. DC injection brake will operate when the X13 signal is turned ON even while operating.
• For the X13 signal input, set "13" in any of 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.
• At the time of vector control, the zero speed control or the servo lock will operate depending of the setting of Pr.802.
• The X13 signal is disabled during PM sensorless vector control.
Setting of operation voltage (torque) (Pr.12)
• Pr.12 DC injection brake operation voltage will set the percent against the power supply voltage. (Not used at the time of
zero speed control or servo lock)
• DC injection brake will not operate with setting of
NOTE
• 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.
600
PARAMETERS
Output
frequency
(Hz)
DC injection
Pr.12
Operation
brake
voltage
voltage
Pr. 11 Operation time
When Pr. 11 = "8888"
Output
frequency
(Hz)
Pr.12
DC injection
brake voltage
ON
X13 signal
ON
STF
= "0%". (The motor will coast to stop.)
Pr.12
Pr. 10 Operation
frequency
Time
Time
Time
Time
ON OFF