Chapter 5 Parameters|VFD-M-D Series
5-36 Revision Jan. 2007, MDE2, SW V1.05
This parameter limits the amount of correction by the PI control on the output frequency when
controlling speed via PG (encoder) feedback. It can limit the maximum output frequency.
2 - 18
Deviation Range of PG Feedback Signal Error
Unit: 0.01
Settings 0.00~100.00% Factory Setting: 3.00
The base is Pr.1-00. When in PG feedback control, if | Source of PG reference target -
feedback | > Pr.2-18 and exceeds Pr.2-19 detection time, the AC drive will operate according
to Pr.2-20.
2 - 19
PG Feedback Signal Detection Time
Unit: 0.1
Settings 0.0 to d 100.0 sec Factory Setting: 2.0
This parameter defines the time during which the PG feedback must be abnormal before a
warning (see Pr.2-20) is given. It also can be modified according to the system feedback signal
time.
If this parameter is set to 0.0, the system would not detect any abnormality signal.
2 - 20 Treatment of the Erroneous PG Feedback Signals
Factory Setting: 00
Settings 00 Warning and keep operating
01 Fault and RAMP to stop
02 Warning and low speed operation
AC motor drive action when the PG feedback signal is abnormal acc. to Pr.2-18.
2 - 21 Sample time for refreshing the content of 210DH and 210EH Unit: 0.01
Settings 0.01~1.00 seconds Factory Setting: 0.10
When the signal source of feedback control is PG (encoder) and it needs to read the pulse
numbers from communication, this parameter can be used to set the refresh time of two
communication addresses (210D and 210E).
Speed Control Diagram
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