Yaskawa VS-626 MC5 - Manual (Page 125)

Basic Operation
6.3.1 PG Speed Control Card Settings
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6.3 Flux Vector Control
With flux vector control (vector control with PG), make the settings for the PG Speed Control Card, select the
zero-speed operation method, set the various autotuning constants, and then adjust the gain of the speed control
loop.
Always perform auto--tuning for motor unit separately before vector control operation. Vector control is not
effective without autotuning.
To ensure high-accuracy speed control, use a motor specifically designed for vector control with an integrated
PG.
When setting up a PG (encoder), connect it directly to the motor shaft. If the PG is connected to the motor via
gearing or belts, responses can be delayed by backlash or torsion; the delayed responses can generate oscillation
and make control impossible.
When continuously operating the unit at low speeds with a heavy load, reduce the carrier frequency (C6--01)
to 2 kHz.
6.3.1 PG Speed Control Card Settings
J Available PG Speed Control Cards
D There are 4 models of PG Speed Control Cards, but only 2 models can be used with vector control.
x PG-B2: Phase-A/Phase-B pulse inputs, complementary output
x PG-X2: Phase-A/Phase-B/Phase-Z pulse inputs, line drivers
D Select the Card according to the application and install it in the Inverter as described in 3.7 Installing
and Wiring PG Speed Control Cards.
J PG Constant: F1-01
D Set the PG (pulse generator or encoder) constant in pulses/revolution.
D Set the number of phase-A or phase-B pulses in one motor revolution.
User Change
during Setting Factory
Valid Access Levels User
Constant
Number
Name
during
Opera-
tion
Setting
Range Unit
Factory
Setting Open Loop
Vector
Flux Vector
F1-01 PG constant 0 to 60000 p/r 600 Q
J PG Rotation Direction: F1-05
D This constant is used to coordinate the PG’s rotation direction with the motor’s rotation direction.
The setting for the standard applicable Yaskawa PG (made by Thermtac) is an advanced phase A for
forward rotation.
D Generally, phase A leads when the PG rotates in the clockwise direction (looking from the input axis).
When a forward reference is output, the motor rotates in the counterclockwise direction (looking from
the output axis).
D Set whether phase A or phase B leads when the motor operates in the forward direction.
User
Change
during Setting Factory
Valid Access Levels User
Constant
Number
Name
during
Opera-
tion
Setting
Range Unit
Factory
Setting Open Loop
Vector Flux Vector
F1-05 PG rotation 0 1 -- 0 B
D Settings
Setting Function
0 Phase A leads with forward rotation. (Phase B leads with reverse rotation.)
1 Phase B leads with forward rotation. (Phase A leads with reverse rotation.)
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