Options6-159Setting Number of Gear Teeth Between PG and MotorSet the number of PG gear teeth in F1-12 and F1-13. If there are gears between the motor and PG, you canoperate the motor by setting the number of gear teeth.When the number of gear teeth has been set, the number of motor rotations within the Inverter is calculatedusing the following formula.No. of motor rotations (min−1.) = No. of input pulses from PC × 60 / F1-01 × F1-13 (No. of gear teeth on loadside) / F1-12 (No. of gear teeth on motor side)Matching Motor Speed During Acceleration and Deceleration to Frequency ReferenceYou can select whether to enable or disable integral operation during acceleration and deceleration when usingV/f with PG control.To match the motor speed as closely as possible to the frequency reference even during acceleration and decel-eration, set F1-07 to 1.Setting PG Pulse Monitor Output Dividing RatioThis function is enabled only when using PG speed control board PG-B2. Set the dividing ratio for the PGpulse monitor output. The set value is expressed as n for the higher place digit, and m for the lower place 2digits. The dividing ratio is calculated as follows:The dividing ratio can be set within the following range: 1/32 ≤ F1-06 ≤ 1. For example, if the dividing ratio is1/2 (set value 2), half of the number of pulses from the PG are monitor outputs.Detecting PG Open CircuitSelect the stopping method when PG cable disconnected is detected and the PG open circuit (PGO) detectiontime.When the Inverter is operating with the frequency reference set to 1% minimum (except when operating ondirect current), if the speed feedback from PG is greater than the time setting in F1-14, PGO is detected.Detecting Motor OverspeedAn error is detected when the number of motor rotations exceeds the regulated limit. An overspeed (OS) isdetected when a frequency that exceeds the set value in F1-08 continues for longer than the time set in F1-09.After detecting an overspeed (OS), the Inverter stops according to the setting in F1-03.Detecting Speed Difference between the Motor and Speed ReferenceAn error is detected when the speed deviation (i.e., the difference between the designated speed and the actualmotor speed) is too great. Speed deviation (DEV) is detected after a speed agreement is detected and when thespeed reference and actual workpiece speed are within the setting of L4-02, if a speed deviation great than theset value in F1-10 continues for longer than the time set in F1-11. After a speed deviation is detected, theInverter stops according to the setting in F1-04.IMPORTANTIf F1-01 is set to 1, overshoot or undershoot may occur easily immediately after acceleration and decelera-tion. To minimize the possibility of overshoot or undershoot occurring, set F1-01 to 0.Dividing ratio = (1 + n)/m (Setting range) n: 0 or 1, m: 1 to 32F1-06 = nm
