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283
Inverter Positioning
Section 5-3
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
6-3-3 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.
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
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
Automatic
calculation
Auxiliary Area
A23/A33
Inverter
frequency
command value
Serial communications
Unit: 0.01 Hz
Содержание CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...