1 General Overview
YASKAWA TOEPC710616134G AC Drive L1000A Technical Manual Addendum 7
1 General Overview
This manual is an addendum to the L1000A Technical Manual. All conditions mentioned in the L1000A Technical
Manual apply. Always heed Safety Instructions as given in the Technical Manual when replacing a drive or
performing installation and setup steps described here.
This documentation is valid for drives:
• with model codes CIMR-LCxFxxxxxxx-913x
• with firmware S3404 or later
2 Brake Monitoring (Unintended Car Movement)
◆ Overview
According to EN81-20:2014, new lifts must be equipped with a system independent of the drive control to prevent
unintended car movement (UCM) away from the stop with open doors. This protection device has three functions:
• Recognition
• Tripping
• Braking
With gearless PM motors, the applied brake can be used as the “braking” part of the UCM-device. In this case, the
brake function has to be monitored. With a certified brake response monitor function, the motor brake and the
drive can act as parts of the UCM protective device.
■ Specification for Brake Response Monitor (BRM) Function
The brake monitor status function supports:
• Checking the status of the brakes at every run command
• Checking the correct switching of the brake within a defined time
• Locking the system if failure is detected
The Brake Response Monitor function is certified according to the normative requirements.
■ Checking the Status of the Brakes
The Brake Response Monitor (BRM) function checks the status of the brakes with every run command.
• Setting 79h: “Brake Feedback” (N.O. signal)
• Setting 5Bh: “Brake Feedback” (N.C. signal)
To comply with the EN81-20:2014 norm, the Brake Feedback function must be selected for two digital inputs
simultaneously (e.g.: H1-07 = 79h & H1-08 = 79h).
Selecting the Brake Feedback function once or more than twice, or mixing the functions (selecting 79h & 5Bh)
triggers an OPE03 fault if the Brake Response Monitor function is enabled (S6-17 = 1).
◆ Wiring
The motor is equipped with two brakes. In the figure below the brakes have two Normally Open (N.O.) switches,
but Normally Closed (N.C.) operation is also possible.
When the motor brakes close, the switches close as well. This causes the digital inputs used for brake monitoring
(e.g. S7 and S8) to change their logic state and unlock the drive allowing the run sequence to start.
EN
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