User’s Manual xLogic SuperRelay65Limit value of OTThe value of the operating hours in OT are retained when you reset the hours counter witha signal at input R. The hours counter OT continues the count as long as En = 1,irrespective of the status at the reset input R. The counter limit of OT is 99999 h. Thehours counter stops when it reaches this value.In programming mode, you can set the initial value of OT. The counter starts operation atany value other than zero. MN is automatically calculated at the START, based on the MIand OT values.Example: MI = 100, OT = 130, the result is MN = 70Parameter presetIn xLogicsoft, you can define MI and an OT start value.You determine that Q does not depend on En by selecting the corresponding check box.Retentivity with the hours counterThe hours counter in the xLogic is generally retentive.However, if the values of the hours counter are lost after a power failure, then select therespective block in your circuit program. Right mouse click on the hours counter andselect Block Properties > Parameters. The option Retentivity must be activated and notchangeable (grayed out).If the Retentivity option is not available, then delete the block and insert a new specialfunction hours counter at the same position.3.4.15 Threshold triggerShort descriptionThe output is switched on and off, depending on two configurable frequencies.