LSIS LSLV0055H100-4COFN - Page 162

Learning Advanced Features
148
Note
When the maximum frequency value is high, output frequency deviation may result due to
analog input variation and deviations in the calculations.
Auxiliary Reference Operation Ex #3
V1 is Main Frequency and I2 is Auxiliary Frequency
• Main frequency: V1 (frequency command setting to 5 V and is set to 30 Hz)
• Maximum frequency setting (DRV-20): 400 Hz
• Auxiliary frequency (BAS-01): I2[Display by percentage (%) or auxiliary frequency (Hz)
depending on the operation setting condition]
• Auxiliary reference gain (BAS-03): 50%
• IN-01–32: Factory default
Example: An input current of 10.4 mA is applied to I2, with the frequency corresponding to 20
mA of 60 Hz. The table below shows auxiliary frequency Aas 24 Hz (=60[Hz]x{(10.4[mA]-
4[mA])/(20[mA]-4[mA])} or 40% (=100[%] x {(10.4[mA] - 4[mA]) /(20 [mA] - 4[mA])}.
Setting*
Calculating final command frequency**
0
M[Hz]+(G[%]*A[Hz])
30 Hz(M)+(50%(G)x24 Hz(A))=42 Hz
1
M[Hz]*(G[%]*A[%])
30 Hz(M)x(50%(G)x40%(A))=6 Hz
2
M[Hz]/(G[%]*A[%])
30 Hz(M)/(50%(G)x40%(A))=150 Hz
3
M[Hz]+{M[Hz]*(G[%]*A[%])}
30 Hz(M)+{30[Hz]x(50%(G)x40%(A))}=36 Hz
4
M[Hz]+G[%]*2*(A[%]-50[%])[Hz]
30 Hz(M)+50%(G)x2x(40%(A)–50%)x60 Hz=24
Hz
5
M[HZ]*{G[%]*2*(A[%]-50[%])}
30 Hz(M)x{50%(G)x2x(40%(A)–50%)}=-3
Hz( Reverse )
6
M[HZ]/{G[%]*2*(A[%]-50[%])}
30 Hz(M)/{50%(G)x2x(60%–40%)}=-300
Hz( Reverse )
7
M[HZ]+M[HZ]*G[%]*2*(A[%]-
50[%])
30 Hz(M)+30 Hz(M)x50%(G)x2x(40%(A)–
50%)=27 Hz
* M: main frequency reference (Hz or rpm)/G: auxiliary reference gain (%)/A: auxiliary
frequency reference (Hz or rpm) or gain (%).
**If the frequency setting is changed to rpm, it is converted to rpm instead of Hz.