R&M Materials Handling HOIST MONITORS - Manual (Page 71)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
- If the contactor isn’t energized then problem is the control connections. Check connections between the
contactors and the unit terminal 1
• Limit switches
• Bimetal switch
• Mechanical overload switch
• Check the operation of the current transformer
- Drive the hoist in slow speed and measure voltage between the terminal 27 and the terminal 29
- See appendix: Current Transformer Table
• Check connection to the hoist motor
- If the power line is broken then current can’t go to the motor
• If the hoist is stopped by any external reason (for example stop limit switch, breaker fault) the unit
always indicates this fault. The situation is resetted when the requests (HIN and LIN) are deactivated.
Stepless control
•
Check that the brake contactor switch is connected to the terminal 8 (FIN)
• Check that there are not faults of the inverters.
• If the hoist is stopped by any external reason (for example stop limit switch, breaker fault, inverter
fault) the unit always indicates this fault. The situation is resetted when the requests (HIN and LIN)
are deactivated.
14.1.6 Fault Brake F_Br
Hoist brake does not open (only in motor torque based load calculation. The parameter 4-7-1
“Load meas.” = Motor)
•
Check that the hoist brake opens properly
• Check the brake connections
• Check parameters 1-2-2 and 1-2-3.
- If the temperature sensors are not connected, the values for parameters 1-2-2 “Temp 1” and/or 1-2-3
“Temp 2” is < -20
o
C (< 0
o
F).
• Check that temperature sensor 1 (slow speed) is connected to terminals 21 - 22, and sensor 2 (fast
speed) is connected to terminal 23 - 24.
- Drive the hoist in slow speed and check that reading of parameter 1-2-2 Temp 1 increase.
- Drive the hoist in fast speed and check that reading of parameter 1-2-3 Temp 2 increase.
• Check the parameters 3-2-2 “Mhs1” and 3-2-7 “Mhs2”.
- If the values are equal to each other, the calibration is done with only one load. (Confirm by checking the
following parameters: 3-2-3≠3-2-8, 3-2-4≠3-2-9, 3-2-5≠3-2-10).
- Perform the calibration procedure as described in this manual.
• If the parameters 3-2-7 … 3-2-10 values have the negative, check the current transformers and their
connections and/or the voltage measurement connections. Pay special attention to the correct phase
order.
• If supply voltage frequency is 60Hz, check that parameter 1-2-16 is set to 60 Hz. The hoist-monitoring
unit must identify the supply voltage frequency.
14.1.7 Fault Br wear F_Brw
Hoist brake is worn out (only when the brake wear sensor is installed)
•
Check the brake wear sensor
• If the sensor is connected to the terminals 21-22, check that 4-4-1 “T1 operat.” is set to Bwear
• If the sensor is connected to the terminals 23-24, check that 4-5-1 “T2 operat.” is set to Bwear
• If a brake wear sensor is NOT installed, make sure the function is disabled with parameters 4-4-1 and
4-5-1