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303
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 CPU UNIT - 03-2009
Страница 1: ...Cat No W462 E1 06 CP1L CPU Unit SYSMAC CP Series CP1L L_0D_ CP1L M_0D_ OPERATION MANUAL...
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Страница 4: ...iv...
Страница 10: ...x...
Страница 22: ...xxii...
Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 70: ...36 Function Blocks Section 1 5...
Страница 584: ...550 Trouble Shooting Section 8 7...
Страница 627: ...593 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 630: ...596 Sample Application Section 9 12...
Страница 654: ...620 Troubleshooting Unit Errors Section 11 4...
Страница 662: ...628 Replacing User serviceable Parts Section 12 2...
Страница 668: ...634 Standard Models Appendix A...
Страница 698: ...664 Auxiliary Area Allocations by Function Appendix C...
Страница 746: ...712 Auxiliary Area Allocations by Address Appendix D...
Страница 773: ...739 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 774: ...740 Connections to Serial Communications Option Boards Appendix F...
Страница 806: ...772 Index...
Страница 808: ...774 Revision History...