332
Inverter Positioning
Section 7-3
(2) The encoder resolution times the counter multiplier times the gear ratio
equals the number of pulses output by the encoder for one motor shaft
revolution.
Example of
Calculating
Conversion Factor
Conditions
• Frequency for 1 revolution/s for inductive motor: 2 Hz (motor specification)
• 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 specification)
Calculations
The factor goes into the formula as shown below.
For example, to output a power supply frequency of 10 Hz to the motor:
Frequency of internal pulse output = 500
×
10 Hz = 5,000 Hz = 5 kHz
Therefore, set a pulse output frequency of 5 kHz in the pulse output instruc-
tions (e.g., PLS2).
CP1L-EL/EM
Pulse output
instruction
Target frequency
Internal
pulses
Error
counter
Conversion formula
Inverter
Motor
Power
supply
frequency
Encoder
2
1000
×
4
×
1/4
500
×
Power supply frequency to motor (Hz)
Frequency of
internal pulse
output (Hz)
Power supply
frequency to
motor (Hz)
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......