Calibration and Verification of Safety Functions
42-02-7223 C1 4-49
4
iControl DC
Calibration and Verification of Safety Functions
Before performing the following adjustments and tests please do the following:
1. Verify that the car performs the releveling operation properly. Please refer to “Verify
Releveling” on page 4-5 and see “Releveling Operation ” on page 4-36.
2. Perform the Normal and Emergency Terminal Limit Switches learn procedure. This is
necessary if any pattern parameters have been changed since the last time the learn pro-
cedure was performed. Please refer to “Learning Normal & Emergency Terminal Limit
Switches” on page 4-12.
Tach Error Tripping Threshold Adjustment
This test compares the pattern signal with the velocity feedback signal and sets the point at
which the Tach Error fault trips as a result of excessive error between the Actual and intended
car speed.
1. Verify that the TACH ADJ. trimpot has been properly adjusted:
• For System 12 SCR Drive, see “Calibrating Actual Car Speed (System 12 SCR Drive)” on
page 2-38.
• For Quattro DC Drive, see “Verifying Pattern Command and Speed Feedback” on
page 2-57.
2. Arrange the car for full load condition.
3. Verify that the iBox Test switch is in the ON position.
4. On the Virtual Oscilloscope, set Test point 1 to Speed Feedback and Test point 2 to Tach
Error Upper Limit. (Tach Error Upper Limit determines the upper threshold below
which velocity feedback is allowed to deviate from the pattern.)
5. Start with Following error set to 1.0% (Configuration > Drive > Safety tab).
6. Set the iBox Fault/Function Bypass switch to the ON position. (Note that fault bypass is
automatically disabled after a fifteen minute timer expires.)
7. On the Diagnostics > Fault Bypass tab, click Tach error (bypasses Tach Error fault).
8. Run the car up and down the hoistway. If the Speed Feedback trace on the Virtual Oscil-
loscope crosses the Tach Error Upper Limit trace, a Tach Error fault will normally be
generated (we have it bypassed).
9. If the two traces on the oscilloscope cross, increase Following error in 5% increments,
running the car with each change, until the two traces no longer cross.
10. When the two traces no longer cross, add 5% to the Following error setting as a margin.
11. Set Test point 2 to Tach Error Lower Limit. This is the lower threshold below which
velocity feedback is allowed to deviate from the pattern.
12. Repeat steps 7 through 9 for Tach Error Lower Limit.
Speed Feedback
Tach Error Upper Lmt
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