339
Inverter Positioning
Section 7-3
Example of
Calculating
Conversion Factor
Conditions
• Power Supply Frequency for One Motor Revolution per Second: 2 Hz
(PLC Setup)
• Number of Encoder Pulses for One Motor Revolution: 1,000 (PLC Setup)
• Rotary encoder resolution: 1,000 pulses/revolution (encoder specifica-
tion)
• High-speed counter multiplier: x4 (PLC Setup)
• Gear ratio between motor and encoder shafts: 1/4 (machine specifica-
tion)
• Error Counter Cycle: 12 ms (PLC Setup)
Calculation
The calculation performed inside the PLC is as shown below.
Serial Communications
The command value calculated above is used in the Modbus-RTU command
frame, adjusting for the frequency unit. (See note.)
Refer to 8-3-3 Modbus-RTU Easy Master Function and to the inverter manual
for details on Modbus-RTU communications.
Note
If the frequency command unit set in the inverter is 0.1 Hz, divide the com-
mand frequency in A23 or A33 by 10.
Analog Output
The following example is for the CP1W-DA041/CP1W-DA021.
The analog output resolution is 6,000, so the command value calculated
above is multiplied by 6,000 divided by the inverter’s maximum output fre-
quency.
CP1L-EL/EM
PLC Setup
Output value
Automatic
calculation
Inverter frequency
command value
Auxiliary Area
A23 or A33
Unit: Hz
Auxiliary Area
A20/A21 or
A30/A31
Unit: 0.01 Hz
A23/A33
Inverter frequency
command value
(0.1-Hz increments)
2
1000
×
0.012
Output value: Hz
A20/A21
A30/A31
Output value: Hz
A20/A21
A30/A31
17
(To 0.01-Hz
increments)
100
CP1L-EL/EM
Automatic
calculation
Auxiliary Area
A23/A33
Inverter
frequency
command value
Serial communications
Unit: 0.01 Hz
Содержание CP1L-EL20DR-D
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Страница 4: ...iv...
Страница 10: ...x...
Страница 22: ...xxii...
Страница 34: ...xxxiv Software Licenses and Copyrights 7...
Страница 178: ...144 Connecting the CX Programmer Section 5 1 Click the Connect button to connect and then connection online is completed...
Страница 192: ...158 Trial Operation and Debugging Section 5 3...
Страница 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Страница 666: ...632 Trouble Shooting Section 11 7...
Страница 696: ...662 Standard Models Appendix A...
Страница 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Страница 836: ...802 PLC Setup Appendix G...
Страница 838: ...804 TCP Status Transitions Appendix H...
Страница 840: ...806 Ethernet Network Parameters Appendix I...
Страница 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Страница 844: ...810 Ethernet Specifications Appendix K...
Страница 851: ...Index 817 work words 118 write protection 447...
Страница 852: ...818 Index...
Страница 854: ...820 Revision History...
Страница 855: ......