Delta MS300 Series User Manual page 344

 Analog signals, such as those entering AVI and ACI, are commonly affected by interference that
affects the stability of the analog control. Use the Input Noise Filter to create a more stable
system.
 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

Settings
 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
Settings
 Determines the treatment when the 4–20 mA signal is lost (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 drive stops, the condition that causes the warning does not exist, so the warning
automatically disappears.
03-20
AFM Multi-Function Output

Settings
0: Disable (AVI, ACI)
1: Enable (excludes analog extension card)
0: Disable
1: Continue operation at the last frequency
2: Decelerate to 0 Hz
3: Stop immediately and display "ACE"
0–23
Chapter 12 Descriptions of Parameter SettingsMS300
335
Default: 0
Default: 0
Default: 0