EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company
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E78, E79<br />
E80, E81<br />
Torque Detection 1 (Level and Timer)<br />
Torque Detection 2/Low Torque Detection (Level and Timer)<br />
E78 specifies the operation level and E79 specifies the timer, for the output signal TD1. E80 specifies the<br />
operation level and E81 specifies the timer, for the output signal TD2 or U-TL.<br />
Output signal Assigned data<br />
Operation level<br />
Timer<br />
Range: 0 to 300% Range: 0.01 to 600.00 s<br />
TD1 46 E78 E79<br />
TD2 47 E80 E81<br />
U-TL 45 E80 E81<br />
• Torque detected 1 -- TD1, Torque detected 2 -- TD2<br />
The output signal TD1 or TD2 comes ON when the torque value calculated by the inverter or torque command<br />
exceeds the level specified by E78 or E80 (Torque detection (Level)) for the period specified by E79 or E81<br />
(Torque detection (Timer)), respectively. The signal turns OFF when the calculated torque drops below "the level<br />
specified by E78 or E80 minus 5% of the motor rated torque." The minimum ON-duration is 100 ms.<br />
• Low output torque detected--U-TL<br />
This output signal comes ON when the torque value calculated by the inverter or torque command drops below<br />
the level specified by E80 (Low torque detection (Level)) for the period specified by E81 (Low torque detection<br />
(Timer)). The signal turns OFF when the calculated torque exceeds the "level specified by E80 plus 5% of the<br />
motor rated torque." The minimum ON-duration is 100 ms.<br />
In the inverter’s low frequency operation, as a substantial error in torque calculation occurs, no low torque can be<br />
detected within the operation range at less than 20% of the base frequency (F04). (In this case, the result of<br />
recognition before entering this operation range is retained.)<br />
The U-TL signal goes off when the inverter is stopped.<br />
Since the motor parameters are used in the calculation of torque, it is recommended that auto-tuning be applied<br />
by function code P04 to achieve higher accuracy.<br />
E98, E99 Terminal [FWD] Function<br />
Terminal [REV] Function<br />
(Refer to E01 to E07.)<br />
4-104