Specifications - Omron CP1L CPU UNIT - 06-2007 Operation Manual

Inverter Positioning
Low-speed Operation
Using Minimum Output
Setting
Absolute Positioning
Note
5-3-4

Specifications

Inverter Positioning
Specifications
266
Pulse frequency
PLS2
Error counter
instruction
error setting
In-position width
Pulse Output Flag
In-position flag
Error Counter Error
Flag (Output value cleared.)
Error Counter Reset Bit
(Error counter cleared.)
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.
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.
The absolute position will change if the present value of the high-speed
counter is changed or the high-speed counter is reset.
Item
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- Two ports at 100 kHz (within the speed command range of the
ing ports and pulse output instructions)
response frequency
Inverter command Modbus-RTU communications commands or analog output
output method (from ladder program)
Present value coor- With origin: Absolute coordinate system
dinate 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- Trapezoidal or S-curve acceleration/deceleration
eration control
Motor shaft
Error counter
turned manually.
present value
Specification
Section 5-3
Error counter
error occurs.
Time