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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 UP/DOWN control when the frequency command source is switched
When the frequency command source is switched to UP/DOWN control from other sources,
the initial frequency for 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 control
Cancel PID control
(Hz/PID)
Reference frequency given by PID
control (PID processor output)
Multistep frequency
Select multistep frequency
(SS1, SS2, SS4 and SS8)
Communications link
Enable communications
link via RS-485 (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.
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