EA180 Series Servo Drive Users Manual *1: The delay time of brake varies with the motor model. Please refer to Chapter 11 and the actual situation shall prevail. *2: P0-16 specifies the time interval from the time when the servo drive receives the enable (/S-ON) command to the time when it can receive the position, speed and torque commands, which must be greater than the time required for brake release. After the/S-ON signal is ON, the upper device should wait for this time before outputting commands to the servo drive. *3: Please use P0-09, P0-10, P0-11 to set the time for brake action and servo drive OFF.
3.7.2.2 Brake signal (/BK) output time when servo motor stops In the case of vertical axis, the dead weight of the moving parts of the machine or external force may cause slight movement of the machine. By setting P0-11, the motor can be in a non-energized state only after the brake is engaged to eliminate slight mechanical movement.
Servo enable (/S-ON) OFF ON Brake command Released Engaged P0-11 Motor ON Motor ON Motor OFF Figure 3-22 Brake action timing sequence when servo enable OFF 3.7.2.3 Brake signal (/BK) output time when servo motor rotates When an alarm occurs or the enable signal is forcibly cancelled during the rotation of the servo motor, the servo motor will immediately enter the OFF state. At this time, the brake signal (/BK) output time can be adjusted by setting the brake command output speed value P0-10 and the servo OFF-brake command waiting time P0-09. Brake operation conditions when servo motor rotates When any of the following conditions is true, the brake signal will act:
The motor speed is lower than the set value of P0-10 Servo enable (/S- or alarm or Power OFF ON) signal ON OFF Motor power ON after the motor enters the OFF state. The set time of P0-09 has passed after the motor enters Motor speed P0-10 OFF the OFF state. Coast to stop Released Engaged P0-09 Fig. 3-23 Brake actions when servo motor rotates 39 Attention☞ When an alarm occurs under any circumstances, P0-11 is invalid and the servo motor will immediately enter the OFF state. At this time, the moving part may move freely before the brake acts. Attention☞ 1. The servo motor speed will not exceed its maximum speed even if the set value in P0-10 is higher than the maximum speed. 2.
Do not assign the motor rotation signal (TGON) and the brake signal (BK) to the same terminal. Otherwise, the TGON signal will be ON due to the falling speed of the vertical axis, and the brake may not operate.