Specifications

Page 18 RollSeal SC-325 & SC-650 Controllers Part No 4801-5156 Rev 10-2014

mode at this time, set PS1 to “No” and press the Mode button. The controller will exit the programming

mode and return to displaying the actual position.

PS2 – Set Open Limit – Default set to 25

When the Mode button is pressed after setting PS1, the door will open to the position of the Home switch

then proceed toward the current setting of the Open Limit. Use the Up and Down arrows to set the door

to a new Open Limit position. Then press Mode to proceed to the next parameter.

PS3 – Set Closed Limit - Default set to 400 (Must Be Lower To Seal At The Bottom)

When the Mode button is pressed after setting the Open Limit, the door will close to the current setting of

the Closed Limit. Use the Up ( ) and Down ( ) arrows to set the door to a new Closed Limit position.

Then press Mode to exit the programming mode and return to displaying the actual position.

6.2 Acceleration and Deceleration Range

The Smart Controllers measure the position of the door in Relative Position Units called counts. (See

Section 4.1.) Counts are read from the door encoder and transmitted to the controller as electrical

pulses. Counts begin at zero when the door is open and get higher as the door is closed. Acceleration

and Deceleration ranges are also measured in Counts.

The Smart Controllers have programmable adjustments for the Acceleration and for the Deceleration

Ranges. These are adjusted by setting the program parameters P2 and P3. See Section 6.1 for the

procedure to set these parameters.

The acceleration range is measured in units of counts and is the range over which the door will

accelerate from a stopped position to the open or close speed. The Deceleration Range is measured in

units of counts and is the range over which the door will decelerate from the open or close speed to a

stopped position. Typical values for the Acceleration Range are 40 counts and for the Deceleration

Range is 80 counts.

These ranges are illustrated in the shown graph for the case of opening the door. From the full closed

position, the door accelerates to the open speed during the Acceleration Range then slows during the

Deceleration Range to the open position.

P2 AND P3 SETTINGS THAT PRODUCE A “SMOOTH” DOOR OPERATION

The Smart Controller Acceleration and Deceleration ranges (P2 and P3) should be adjusted to produce a

smooth acceleration and minimize the use of the motor brake when stopping. The following table shows

approximate values for parameters P2 and P3 that will produce a smooth and efficient door operation

based upon the speed of the door.

Values of P2 & P3 for Smooth Door Operation

SPEED

(inches/sec.)

P2 Acceleration

(Counts)

P3 Deceleration

(Counts)