SmarTraq
34 Manual # 42-02-D008 Rev. A2
Opening and Closing
Open and closing operations are accomplished by setting parameters for:
• High Speed Open and Close speeds using “U1/ U3”.
• Low Speed Open and Closing speeds using “U2/ U4”.
• Initial Open speed and distance using “U0” and “PL”.
• Open and Close acceleration using “A0/A2”.
• Open and Close deceleration and slowdown distance using “A1”and “P2/A3” and “P7”.
IF… Deceleration during opening or closing is too fast and doors jerk:
1. Parameter “A1” or “A3” is set too high. Reduce “A1” and “A3” and, consequently, reduce
“P2” and “P7”.
2. Deceleration is too late and doors are approaching full open/close position too fast,
safety braking action is activated, which suddenly reduces door speed. Reduce “P2” and
“P7” and increase “A1” and “A3”.
3. These steps are usually sufficient to solve this problem. However, should problem per-
sist and YOU ARE SURE YOU have tried all possible combinations of values for “A1”,
“A3”, “P2”, and “P7”, change the value of the “Cb” parameter. Start with a value of 20,
for example, and decrease gradually, checking each time until the problem is corrected.
“Cb” is a parameter which is usually kept at 00 value and is used to limit braking action of
doors. We suggest it be used only if absolutely necessary
and no other action is effective. Do not
reduce value of “Cb” too much, otherwise there may not be enough braking action. It should be
kept at the highest possible value that corrects the problem.
Setting “Cb” to 00 does not put a limit on braking torque.
IF… A high value for opening speed is set but doors move slower than expected:
1. Be sure DOL was detected.
2. Acceleration parameter “A0” may be set too low.
3. Doors may be very heavy or there is excessive friction or mechanical ratio between
motor and doors is low so that torque or power limit has been reached.
IF… A high value for closing speed is set but doors move slower than expected:
1. Be sure DOL was detected.
2. Check that open acceleration parameter “A2” is not set too low.
3. Doors may be very heavy or there is excessive friction or mechanical gear ratio between
motor and doors is low so that torque or power limit has been reached.
4. Value of “C3” parameter is too low, so that allowable closing torque is too low and not
enough to move doors at desired speed. Increase value of “C3” gradually and check if
this corrects problem.
Multiple parameters affect closing torque. Please refer to “Inverter Drive Parameters” on
page 20.
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