R&M Materials Handling HOIST MONITORS - Manual (Page 68)

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.
14 Troubleshooting
In the fault logger (5-2 Fault log) each fault is identified with a fault code and the values of the start
counter that corresponds to the detection time of the fault. The first fault in the logger (5-2-1) is the latest
one.
In the table below, the column “Code” (e.g. F_OL) indicates the abbreviation for each fault as shown in
the fault logger.
14.1 Fault descriptions
14.1.1 Fault Hoist OL F_OL
Hoist overload
•
Confirm that the value on load display is the actual load, not tared load
• Confirm that the lifted load is not more than 110% of the rated load of the hoist.
• Load display updates the values slower than overload protection trips.
• Check the parameter 6-4 (must be equal to the rated load of the hoist)
• Check if intermediate load limits are in use. (Parameters 4-1-1 and 4-2-1)
• Perform the calibration procedure, when required, as described in this manual.
• Check the parameter 4-7-1 value
The parameter 4-7-1 value is “Sens.”
•
Check the parameters 3-4-2 “Input 1” and 3-4-4 “Input 2”. When the values are equal to each other,
the calibration is done with only one load. Perform the calibration procedure as described in this
manual.
• Check that the parameter 1-2-10 Ain1 value is between the parameters 3-4-2 and 3-4-4 value
- If the parameter 1-2-10 value is ~9.8V
• The signal wire hasn’t been connected to the Analog input 1 (the terminal 26)
• The neutral wire is broken between the unit and the sensor.
• Check the connections between the amplifier and strain gauge.
- If the parameter 1-2-10 value is less than ~1V
• The power signal wire (+10V) is broken between the unit and the sensor.
• The strain gauge sensor is not connected to the amplifier.
• Check the connections between the amplifier and strain gauge.
- If the parameter 1-2-10 value is OK, but the load measure don’t work, then is possible that wires have been
connected crosswise.
• Check the connections from the unit to the load sensor.