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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• Starting frequency 1 (Holding time) (F24) Data setting range: 0.00 to 10.00 (s)<br />
F24 specifies the holding time for the starting frequency 1.<br />
• Stop frequency (F25)<br />
Data setting range: 0.0 to 60.0 (Hz)<br />
F25 specifies the stop frequency at the stop of the inverter. Under V/f control, even if the stop frequency is set at<br />
0.0 Hz, the inverter stops at 0.1 Hz.<br />
• Stop frequency (Holding time) (F39) Data setting range: 0.00 to 10.00 (s)<br />
F39 specifies the holding time for the stop frequency.<br />
If the starting frequency is lower than the stop frequency, the inverter will not output any power as long as<br />
the reference frequency does not exceed the stop frequency.<br />
Under vector control with/without speed sensor (F42 = 5, 6)<br />
At the startup, the inverter first starts at the "0" speed and accelerates to the starting frequency according to the<br />
specified acceleration time. After holding the starting frequency for the specified period, the inverter again<br />
accelerates to the reference speed according to the specified acceleration time.<br />
The inverter stops its output when the reference speed or detected one (specified by F38) reaches the stop<br />
frequency specified by F25.<br />
Specifying the holding time for the starting frequency compensates for the delay time for the establishment of a<br />
magnetic flux in the motor; specifying that for the stop frequency stabilizes the motor speed at the stop of the<br />
inverter.<br />
• Starting Frequency 1 (F23)<br />
Data setting range: 0.0 to 60.0 (Hz)<br />
F23 specifies the starting frequency at the startup of an inverter.<br />
• Starting Frequency 1 (Holding time) (F24) Data setting range: 0.00 to 10.00 (s)<br />
F24 specifies the holding time for the starting frequency 1.<br />
• Stop Frequency (F25)<br />
F25 specifies the stop frequency at the stop of the inverter.<br />
Data setting range: 0.0 to 60.0 (Hz)<br />
• Stop Frequency (Holding time) (F39) Data setting range: 0.00 to 10.00 (s)<br />
F39 specifies the holding time for the stop frequency.<br />
• Zero Speed Control (d24)<br />
To enable zero speed control under vector control with speed sensor, it is necessary to set the speed command<br />
(frequency command) at below the starting and stop frequencies. If the starting and stop frequencies are 0.0 Hz,<br />
however, the zero speed control is enabled only when the speed command is 0.00 Hz. d24 specifies the operation<br />
for the zero speed control at the startup of the inverter.<br />
Data for d24 Zero speed control Descriptions<br />
0 Not allowed at startup<br />
1 Allowed at startup<br />
Even setting the speed command at below the starting and stop<br />
frequencies and turning a run command ON does not enable the zero<br />
speed control.<br />
To enable the zero speed control, set the speed command at above the<br />
starting frequency and then start up the inverter again.<br />
Setting the speed command at below the starting and stop frequencies<br />
and turning a run command ON enables the zero speed control.<br />
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