Filter
Top Products
83
Standard operation functions (Pr. 10 to Pr. 16)
PARAMETERS
3
z Relationship between DC injection brake operation and pre-excitation operation in each
control mode
z The control block diagram during pre-excitation
z Timing chart
* When the LX (pre-excitation) terminal is off, the pre-excitation operation functions for the time set in the DC
injection brake operation time (Pr. 11).
Control Mode
Operation
LX terminal OFF
(Deceleration to stop)
LX terminal ON
Pre-excitation
selection
Pr. 802 = 0
Pre-excitation
selection
Pr. 802 = 1
Pre-excitation
selection
Pr. 802 = 0
Pre-excitation
selection
Pr. 802 = 1
V/F control DC injection brake DC injection brake No operation No operation
Speed control (vector control) 0 speed control Servo lock 0 speed control Servo lock
Position control (vector control) No operation No operation Servo lock Servo lock
CAUTION
The DC injection brake functions during speed limit under speed control or torque control. (It does not
function under position control.)
CAUTION
Install a mechanical brake.
After the machine stops fully and the mechanical brake is applied, switch the LX signal (pre-
excitation) off.
Related parameters
• DC injection brake operation speed when Pr. 10 = 9999 ⇒ Pr. 13 "starting speed" (Refer to page 84.)
• Motor setting when using constant-torque motor
⇒ Pr. 71 "applied motor", Pr. 450 "second applied motor" (Refer to
page 111.)
• Setting control mode ⇒ Pr. 800 "control system selection" (Refer to page 169.)
• LX signal terminal assignment ⇒ Set "23" in any of Pr. 180 to Pr. 183 and Pr. 187 (input terminal function selection).
(Refer to page 150.)
Pr.802 = 0
Pr.802 = 1
Position control Speed control Motor
0r/min speed command
0rad position command
STF
Speed
LX pre-excitation
Pre-excitation operation
0 speed control or servo lock
DC injection brake time (Pr.11)
is made invalid.
Normal operation
DC injection brake operation
speed (Pr. 10)
Pre-excitation operation
0 speed control or servo lock
DC injection brake time (Pr.11)
is made invalid.