2-49
Running on Machine Room Inspection
iControl AC
2
Following Error Margin
Following error is used for fault detection purposes only. The Following error parameter (Con-
figuration > Drive > Safety tab) sets the allowed margin of deviation from commanded speed as
a percentage. A Tach Error fault is generated when the difference between intended pattern
speed and speed feedback exceeds the Following error margin.
1. Verify that the Pattern (Command) and Speed Feedback signals are tracking properly.
Please refer to “Following Error Margin” on page 2-49.
2. On the Configuration > Pattern > Modes tab, verify that Standard Profile/High Speed
and Inspection Profile/High Speed parameters are set correctly for this job.
3. Verify that actual car speed on Inspection is equal to the Inspection High speed setting.
Please refer to “Following Error Margin” on page 2-49.
4. Set the Following error parameter (Configuration > Drive > Safety tab). It is recom-
mended to perform the Tach Error Tripping Threshold Adjustment procedure at this
time. Please refer to “Tach Error Tripping Threshold Adjustment” on page 2-50.
The default setting for the Following error parameter is 25%. For a car that has been prop-
erly adjusted as described in steps 1 through 3 above, after performing the Tach Error Tripping
Threshold Adjustment, a Following Error setting of 10% is fairly typical. You may choose to leave the
Following error parameter at the default setting or higher, but keep in mind that Following error is a
percentage of speed. On a 500fpm job a 25% Following Error allows a 125fpm contract speed devia-
tion before a fault is generated.
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