Chapter 12 Description of Parameter Settings
MH300
10 Speed Feedback Control Parameters
You can set this parameter during operation.
Default: 0
Settings 0: Disabled
1: ABZ
3: Resolver 1x PM encoder
5. Pulse input (MI7)
When you use the MI7 single-phase pulse input function, you must use it with Pr.00-20 = 4,
Pr.10-00 = 5 and Pr.10-16 = 5
When you use the MI6 and MI7 two-phase pulse input function, you must use them with Pr.00-20
= 4, Pr.10-00 = 0, Pr.10-16 = 1–4
When you use MI7 single-phase pulse input as speed feedback, you must use it with Pr.10-00 =5
and Pr.10-02 = 5. The drive calculates the MI7 single-phase pulse input speed when the control
modes are VF, VFPG, SVC, IM / PM FOC Sensorless, or IM / PM TQC.
When you use MI6 and MI7 two-phase pulse input as speed feedback, you must use them with
Pr.10-00 = 5 and Pr.10-02 = 1–4. The drive calculates the MI6 and MI7 two-phase pulse input
speed when the control modes are VF, VFPG, SVC, IM / PM FOC Sensorless, or IM / PM TQC.
Encoder Pulses per Revolution
Default: 600
Settings 1–20000
This parameter sets the encoder pulses per revolution (ppr). It is a feedback control signal source
when using PG. The encoder sets the number of pulses for the motor rotating through one rotation.
The A
/ B phas
e cycle generates the pulse number.
This setting is also the encoder resolution. The speed control is more accurate with higher
resolution.
If you set this parameter incorrectly, it may cause motor stall, drive over-current, or a magnetic
pole origin detection error for the PM motor in closed-loop control. When using the PM motor, you
must perform the magnetic pole origin point detection (Pr.05-00 = 4) again if you modify the
content of this parameter.
Encoder Input Type Setting
Default: 0
Settings 0: Disable
1: Phas
es A and B are pulse inputs, forward direction if A-phase leads B-
phase by 90 degrees.