Nidec MCE iControl User Manual

Final Adjustment
4-50 Manual # 42-02-7223 C1
Verify Tach Error Does Not Trip on Emergency Stop
1. Set the iBox Fault/Function Bypass switch to the OFF position.
2. Make sure the Tach Error fault is no longer bypassed (Diagnostics > Fault Bypass tab).
3. With a full load in the car, run the car up and down the hoistway to verify that the Tach
Error fault is not generated.
4. Enter a car call several floors below the car (so it can reach contract speed).
5. While the car is running at contract speed (Operational Status / Speed - Actual), discon-
nect the GS terminal from the iBox.
6. The car should trip a Door Lock Fault and make an Emergency Stop.
7. Observe that a Tach Error fault is not generated.
Armature Overcurrent Overload Protection Adjustment
(System 12 SCR Drive)
Armature overcurrent overload protection is intended to protect the motor and acts in a man-
ner similar to a thermal overload. However, instead of using the actual heat generated by exces-
sive armature current, the SCR Loop Over Current fault is generated based on a calculation
using measured armature current and time. The Rated loop over-current parameter on the
Configuration > Drive > Safety tab is used to set the threshold current used in the calculation.
The Loop over-current fault time parameter sets the time used in the calculation. The calcula-
tion used to generate the SCR Loop Over Current fault is:
Another way of stating this is that the SCR
Loop Over Current Fault is generated when
the measured current has been twice the
threshold current for more than the allowed
fault time. The armature current is not con-
stant, so the calculation uses the averaged
armature current in excess of the threshold
current times elapsed time. As with a ther-
mal overload, the greater the amount by
which the measured current exceeds the
threshold current, the shorter the time
required to cause the SCR Loop Over Cur-
rent Fault, as shown in the diagram.
measured
armature
current
(averaged)
Rated loop
over-current
parameter
elapsed
time
Rated loop
over-current
parameter
Loop
over-current
fault time
parameter
SCR Loop
Over Current
Fault
Rated loop
over-current
Rated loop
over-current
times 2
Loop over-current fault time
Time
Armature Current
Loop Over
Current Fault

Nidec MCE iControl Specifications

General

Brand	Nidec
Model	MCE iControl
Category	Control Systems
Language	English