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Inverter Positioning
Section 5-3
Low-speed Operation
Using Minimum Output
Setting
An inductive motor driven with an inverter is different from a servomotor in that
the torque at low speeds is so low that it may not be possible to turn the motor
shaft at the minimum frequency. The CP1L provide a minimum output setting
the ensure a minimum output to enable positioning at low speeds even when
there are extremely few pulses in the error counter.
Absolute Positioning
The amount of movement (i.e., amount of rotation) is input to the high-speed
counter as feedback pulses. During inverter positioning, the present value of
the high-speed counter can be used as an absolute position.
Note
The absolute position will change if the present value of the high-speed
counter is changed or the high-speed counter is reset.
5-3-4
Specifications
Inverter Positioning
Specifications
Pulse frequency
Time
In-position width
Pulse Output Flag
In-position flag
PLS2
instruction
Error counter
present value
Error counter
error setting
Error Counter Error
Flag (Output value cleared.)
Error Counter Reset Bit
(Error counter cleared.)
Motor shaft
turned manually.
Error counter
error occurs.
Item
Specification
Applicable inverters
Inverter that receives frequency commands from an analog
input or via Modbus-RTU communications. (Control method:
V/f control, vector control, etc.)
Applicable motors
Depends on the inverter (e.g., squirrel-cage inductive motor)
Number of position-
ing ports and
response frequency
Two ports at 100 kHz (within the speed command range of the
pulse output instructions)
Inverter command
output method
Modbus-RTU communications commands or analog output
(from ladder program)
Present value coor-
dinate system
With origin: Absolute coordinate system
Without origin: Relative coordinate system
Present value range
32 bits: 8000 000 to 7FFF FFFF hex (range of position com-
mand values and present values for pulse output instructions)
Output modes
Continuous output (Number of pulses not specified.)
Independent mode (Number of pulses specified.)
Acceleration/decel-
eration control
Trapezoidal or S-curve acceleration/deceleration
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 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...