The calibration process is necessary always if the blind/shutter is used for the first time or if there is a need of recalibration or the command restoring the default settings is invoked. The process records the time values in the BLIND_UP_TIME and BLIND_DOWN_TIME registers (by default, values in the registers is 0).
The difference between the BLIND_UP_TIME\BLIND_DOWN_TIME values from the first calibration and recalibration process cannot be greater than 20%.
The calibration can be done by using monostable switches or three-state bistable switches.
- To begin the calibration process the blind/shutter should be in the closed position.
- From the closed position, the blind/shutter needs to be raised to the desired maximum open position.
- The blind/shutter needs to be lowered back to the closed position.
- Points no. 2 and 3 need to be repeated.
Conditions which have to be fulfilled for the calibration to succeed:
- Difference between the two opening time values cannot be higher than 20%.
- Difference between the two closing time values cannot be higher than 20%. Example: The first opening time is 20 seconds. The second one has to be no more than 24 seconds and not less than 16 seconds.
- Each opening/closing movement has to be initiated within 3 seconds after stopping the previous one.
If the the above conditions are met, the opening time values and the closing time values are averaged and written to the BLIND_UP_TIME and BLIND_DOWN_TIME registers. This is indicated by a quick up and down movement of the slats in case of the shutter control or quick up and down movement of the blind.