Mitsubishi Electric 800 Series Instruction Manual page 193

 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.111, Pr.264, Pr.265, Pr.582, Pr.583, Pr.791, Pr.792, Pr.1103, Pr.1477, Pr.1478
NOTE
• Pr.21 setting does not affect the minimum increment setting of Pr.611 Acceleration time at a restart.
• The parameter can be set in five digits including the numbers below decimal point for the FR-PU07. A "1000" or more value
is set in increments of 0.1 s even if Pr.21 = "1".
 Setting multiple acceleration/deceleration times (RT signal, Pr.44, Pr.45,
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.
• Even at the frequency lower than the Pr.147 setting, turning ON the RT signal will switch the acceleration/deceleration time
to the second acceleration/deceleration time. The priority of the signals and settings is RT signal > Pr.147 setting.
• When "9999" is set in Pr. 45, the deceleration time becomes equal to the acceleration time (Pr. 44).
• 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. 7 Pr. 44
RT signal
NOTE
• The reference frequency during acceleration/deceleration depends on the Pr.29 Acceleration/deceleration pattern
selection setting. (Refer to
• The RT signal can be assigned to an input terminal by setting Pr.178 to Pr.189 (Input terminal function selection).
Changing the terminal assignment may affect other functions. Set parameters after confirming the function of each
terminal.
• The RT signal acts as the second function selection signal and makes the other second functions valid. (Refer to
348.)
• RT signal is assigned to the terminal RT in the initial status. Set "3" in any of Pr.178 to Pr.189 (Input terminal function
selection) to assign the RT signal to another terminal.
192
5. PARAMETERS
5.5 (F) Setting of acceleration/deceleration time and acceleration/deceleration pattern
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. 44 Pr. 8
(Pr. 45)
ON
page 194.)
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.
Time
page