5-47
The UP/DOWN control is available in two modes--one mode (H61 = 0) in which the initial
value of the reference frequency is fixed to "0.00" at the start of the UP/DOWN control and the
other mode (H61 = 1) in which the reference frequency applied in the previous UP/DOWN
control applies as the initial value.
When H61 = 0, the reference frequency applied by the previous UP/DOWN control has been
cleared to "0," so at the next restart (including powering on), use the UP terminal command to
accelerate the speed as needed.
When H61 = 1, the inverter internally holds the current output frequency set by the UP/DOWN
control and applies the held frequency at the next restart (including powering on).
At the time of restart, if an UP or DOWN terminal command is entered before the
internal frequency reaches the output frequency saved in the memory, the inverte
control with the new frequency. The previous frequency held will be overwritten by
the current one.
Initial frequency for the UP/DOWN control when the frequency command source is switched
When the frequency command source is switched to the UP/DOWN control from other
sources, the initial frequency for the UP/DOWN control is as listed below:
Initial frequency for UP/DOWN control
Frequency command
source
Switching command
H61 = 0 H61 = 1
Other than UP/DOWN
(F01, C30)
Select frequency
command 2/1 (Hz2/Hz1)
Reference frequency given by the
frequency command source used just
before switching
PID conditioner
Cancel PID control
(Hz/PID)
Reference frequency given by PID control
(PID controller output)
Multi-frequency
Select multi-frequency
(SS1, SS2, SS4 and
SS8)
Communications link
Enable communications
link via RS-485 or field
bus (LE)
Reference
frequency given
by the frequency
command source
used just before
switching
Reference
frequency at the
time of previous
UP/DOWN control
To enable the UP and DOWN terminal commands, you need to set frequency
command 1 (F01) or frequency command 2 (C30) to "7" beforehand.
To Next Page
Loading...
