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(33) Energy-savings tuning operation (Cn-49 to Cn-52)
• In the energy-savings mode (Sn-09 = X1XX) the optimum voltage is calculated according
to load power and the voltage is supplied to the load. However, since the motor settings
differ depending on temperature variation or use of other manufacturers’ motors, the output
voltage is not always optimum. At tuning, operation is controlled so that the optimum operating
status can be obtained by fine adjustment of voltage.
(a)
Tuning Operation voltage Limit (Cn-49)
Limits the range where voltage is controlled by tuning operation. Setting is
made in the units of % of rated voltage. By setting this value to 0, tuning
operation is not performed.
(b)
Tuning Operation Control Cycle (Cn-50)
Sets the control cycle of tuning operation.
(c)
Tuning Operation voltage Step (Cn-51, 52)
Sets voltage variation width of one tuning operation cycle. Setting is made in
the units of % of rated voltage. By increasing this value, rotation speed variation
becomes larger. Initial values are100% and 5%. With other voltage values, voltage
variation width obtained by linear interpolation is set.
Please refer to Appendix A for a detailed discussion of Energy-Savings Mode.
(34) Energy-saving coefficient K2 (Cn-58)
• Voltage at which the motor efficiency will be the maximum is calculated by using this
coefficient at operation in the energy-saving mode, and the resulting value is the
voltage reference. This value is initially set to the value of a TECO-Westinghoue motor.
By increasing the energy-saving coefficient, output voltage becomes larger.
• Please refer to Appendix A for a detailed discussion of Energy-Savings Mode.
2-22
PA 7300
PART II: OPERATION MANUAL
Содержание PA7300 Series
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