Delta MH300 Series

Chapter 12 Description of Parameter Settings
MH300
12.1-03-15

03-15
AVI Analog Input Filter Time

03-16
ACI Analog Input Filter Time
Default: 0.01
Settings 0.00–20.00 sec.
 Use these input delays to filter a noisy analog signal.
 When the time constant setting is too large, the control is stable but the control response is
slow. When the time constant setting is too small, the control response is faster but the control
may be unstable. For optimal setting, adjust the setting based on the control stability or the
control response.

03-18
Analog Input Addition Function
Default: 0
Settings 0: Disable (AVI, ACI)
1: Enable (analog extension card not included)
 When Pr.03-18 = 1:
Example: Pr.03-00 = Pr.03-01 = 1, frequency command = AVI + ACI
 When Pr.03-18 = 0 and the analog input selection settings (Pr.03-00 and Pr.03-01) are the
same, AVI has priority over ACI. In other words, when Pr.03-00 and Pr.03-01 are both set to 1
(Frequency command), the drive ignores the setting value from ACI but execute the frequency
command according to the setting value from AVI.
03-19
Signal Loss Selection for the Analog Input 4–20 mA
Default: 0
Settings 0: Disable
1: Continue operation at the last frequency
2: Decelerate to 0 Hz
3: Stop immediately and display “ACE”
 Determines the treatment when the 4–20 mA signal is lost, when ACIc (Pr.03-29 = 0).
 When Pr.03-29 ≠ 0, the voltage input to ACI terminal is 0–10 V or 0–20 mA, and Pr.03-19 is
invalid.
 When the setting is 1 or 2, the keypad displays the warning code “ANL”. It keeps blinking until
the ACI signal is recovered.
 When the motor drive stops, the warning condition does not continue to exist, so the warning
disappears.