Motion Control Engineering Motion 4000, Manual

Page: 161 / 459

Final Tests
3-39
3
Motion 4000
Buffer Tests
Buffer tests verify that the car or counterweight striking the buffer will cause the machine to
break traction and that the buffer will return to its fully extended state after having been fully
compressed. Following the car buffer test, the counterweight buffer test is executed with an
empty car running up.
Note
These test instructions are written with the expectation that the car or counterweight will be
traveling at contract speed when it strikes the buffer. If reduced stroke buffers are used, this
speed must be reduced to equal the rated speed of the particular buffer.
(Car) Buffer Test
1. Place a full load in the car.
2. Run the car to the top landing
3. Place the car on Machine Room Inspection.
4. On the MPU board, set F3 > Controller System Menu > INSPECTION MODE FAULT
BYPASS = BYPASS ON. The MPU display will scroll FAULT BYPASS IS ACTIVE
(INSPECTION). Return F3 to the down position.
5. Place a jumper between the 2 Bus and SAFH.
6. Set High Speed (F7, 150) to Contract Speed value for full stroke buffers or rated buffer
speed for reduced stroke buffers.
7. Place function switch F5 in the UP position and press N until the TERMINAL LIMIT/
UTILITIES menu is displayed. Press S to select.
8. Press N until PERFORM TERMINAL TESTS is displayed. Press S to select. TERMINAL
TEST RUN/QUIT will be displayed. Press S to start the test.
9. With TERMINAL TEST ARM/QUIT displayed, press S. The LCD will display TERMI-
NAL TEST - READY TO MOVE.
10. Display car speed – F3 > Controller System Menu > POSTN/SPEED.
11. Run the car down using the Machine Room Inspection switches. (If you are in the F5
menu, you will see TERMINAL TEST IN PROGRESS.)
• Release the switches when the car contacts the buffer and the ropes lose traction.
• Car must strike buffer, compress it fully, and cause hoist motor to break traction.
• Check hoistway ropes are still in their grooves before attempting to move car again.
• If the motor rotates more than about one meter after breaking traction, the traction
loss fault MPI-C LANDING SYS A/B POSITION DEVIATION will appear. Press Fault
Reset button to clear this fault.
12. If you are in the F5 menu, it will display TERMINAL TEST DONE, PRESS S. Press S.
13. Exit the F5 menu (if used). Return F7 parameters to their original settings (if used).
14. Remove 2 Bus/SAFH jumper. Set INSPECTION MODE FAULT BYPASS to OFF.
Traction Loss Detection (Slip)
Perform the car or counterweight buffer test per the instructions provided above. Observe that
when the hoist motor breaks traction for about one meter, power is removed from the driving
machine motor and brake within 10 seconds, and the car will not restart. To restore normal
operation, verify you are in Inspection operation then press the Fault Reset button.