170
Diagnostics and Troubleshooting
12.2 Diagnostic Solutions
Typical solutions in reference to operational problems in section 12.1.
Item # Check/Solution
Monitor the Input Status to
Determine Active Speed
(digital input control modes)
For the given combination of inputs selected, verify which speed
command is selected according to the Control Type (LF.02) and X2A
Input Status (LF.82) .This should match the command speed LF.88.
Verify the corresponding speed setting in the Speed Pro le (LF.41-47)
parameter group.
Determine the correct motor
speed in rpm.
For a given command speed in FPM, the corresponding speed is rpm is
calculated as:
Digital Input Speed Commands:
RPM = (12 * Roping Ratio * Gear Ratio * FPM) / (Sheave Diameter *
3.14)
Analog Speed Control:
RPM = (Analog Pattern (ru.27) * Analog Pattern Gain (US.34) * Contract
Speed (LF.20) *12 * Roping Ratio * Gear Ratio * FPM) / (Sheave
Diameter * 3.14 * 100)
Refer to US.34 (Analog Pattern Gain) and US.28 (Analog Input Noise
Clamp) for calculation of Processed (Analog) Pattern from Raw
(Analog) Pattern.
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