R&M Materials Handling HOIST MONITORS - Manual (Page 72)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
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14.1.8 Fault Sensor ch. F_SCh
Measurement signal out of acceptable range
•
Measure the voltage across terminals 26 (I1-A) and 30 (0V). Voltage should be between 0.5...9.5VDC
(low at zero-load; high when load attached to the hook)
• Check the parameter 1-2-10 value
- The parameter 1-2-10 value should be nearly the same as measured, ±1 VDC. If the parameter’s value is
different than measured value then it is possible that input is broken.
- 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 sensor.
• If the parameter 1-2-10 value is less than ~1V
- Measure the voltage across terminal 25 (10V) and 30 (0V). Voltage should be about 10….12VDC
- The power signal wire (10V) is broken between the terminal 25 and the sensor
- The strain gauge sensor is not connected to the amplifier.
- Check the connections between the amplifier and strain gauge sensor.
When the load sensor calibration is done in way, that the zero-load voltage is less than
1.0VDC, the fault only occurs when the signal becomes greater than 9.5VDC.
14.1.9 Fault Curr.meas. F_Ain
Measurement signal out of acceptable range (only two step control)
•
Measure the voltage across terminals 29 (IB) and 30 (0V). Voltage should be about 5VDC
• Measure the voltage across terminals 27 (I2-A) and 29 during hoisting and lowering, low and fast
speed. Voltage should be between 0.5…3 VAC, (peak values: - 4.5…+ 4.5V)
- You can see a voltage level for all hoist motors with the nominal current from the Appendix “3.1 Current
Transformer Table” of this manual
• Measure the voltage across terminals 26 (I1-A) and 29 during hoisting and lowering, low and fast
speed. Voltage should be in between 0.5…3 VAC (peak values: - 4.5…+ 4.5VAC)
- You can see a voltage level for all hoist motors with the nominal current from the Appendix “3.1 Current
Transformer Table” of this manual
• Check parameter 4-7-13. Value should not be less than 0.20s.
• Check parameter 4-7-14. Value should not be less than 0.30s.
Make sure that any other electrical loads (e.g. fans, inverters) haven’t been connected
behind the current transformer.