Mitsubishi Electric FR-A800 Series Instruction Manual page 371

 Changing the minimum increment of the acceleration/deceleration time
(Pr.21)
• Use Pr.21 to set the minimum increment of the acceleration/deceleration time.
Setting value "0" (initial value): minimum increment 0.1 s
Setting value "1": minimum increment 0.01 s
• Pr.21 setting allows the minimum increment of the following parameters to be changed.
Pr.7, Pr.8, Pr.16, Pr.44, Pr.45, Pr.110, Pr.111, Pr.264, Pr.265, Pr.791, Pr.792, Pr.1103
NOTE
• Pr.21 setting does not affect the minimum increment setting of Pr.611 Acceleration time at a restart.
• The FR-DU08 and the FR-PU07 provide a five-digit readout (including the number of decimal places) on a value of parameters.
Therefore, a value of "1000" or larger is set/displayed only in increments of 0.1 second even if Pr.21 = "1".
 Setting multiple acceleration/deceleration times (RT signal, X9 signal,
Pr.44, Pr.45, Pr.110, Pr.111, Pr.147)
• Pr.44 and Pr.45 are valid when the RT signal is ON or when the output frequency is equal to or higher than the frequency
set in Pr.147 Acceleration/deceleration time switching frequency. Pr.110 and Pr.111 are valid when the X9 signal is
ON.
• Even at the frequency lower than the Pr.147 setting, turning ON the RT signal (X9 signal) switches the acceleration/
deceleration time to the second (third) acceleration/deceleration time. The priority of the signals and settings is X9 signal
> RT signal > Pr.147 setting.
• To input the X9 signal, set "9" in any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function to the
terminal.
• When "9999" is set in Pr.45 and Pr.111, the deceleration time becomes equal to the acceleration time (Pr.44, Pr.110).
• When Pr.110 = "9999" is set, the third acceleration/deceleration function is disabled.
• If the Pr.147 setting is equal to or less than the Pr.10 DC injection brake operation frequency or the Pr.13 Starting
frequency setting, the acceleration/deceleration time switches to the Pr.44 (Pr.45) when the output frequency reaches or
exceeds the Pr.10 or Pr.13 setting.
Pr.147 setting
9999 (initial value)
0.00 Hz
0.01 Hz ≤ Pr.147 ≤ Set frequency
Set frequency < Pr.147
Output frequency
(Hz)
Set
frequency
Pr. 147
setting
Pr.7 Pr.44
RT signal
X9 signal
370
5. PARAMETERS
5.8 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
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Acceleration/deceleration time
Pr.7, Pr.8
Pr.44, Pr.45
Output frequency < Pr.147: Pr.7, Pr.8
Pr.147 ≤ Output frequency: Pr.44, Pr.45
Pr.7, Pr.8
Pr.110
Pr.111 Pr.44
(Pr.45)
ON
ON
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Pr.8
Pr.44
Pr.7
Description
Acceleration/deceleration time is not
automatically changed.
Second acceleration/deceleration time is
applied from the start.
Acceleration/deceleration time is
automatically changed.
Not changed as the frequency has not
reached the switchover frequency.
Pr.44 Pr.8
(Pr.45)
Time