Mitsubishi Electric FR-A520-0.4K Instruction Manual page 108

Note: 1. The frequency can be varied by RH (acceleration) and RM (deceleration) between 0 and the
maximum frequency (Pr. 1 or Pr. 18 setting).
2. When the acceleration or deceleration signal switches on, the set frequency varies according to
the slope set in Pr. 44 or Pr. 45. The output frequency acceleration/deceleration times are as set
in Pr. 7 and Pr. 8, respectively. Therefore, the longer preset times are used to vary the actual
output frequency.
3. If the start signal (STF or STR) is off, switching on the acceleration (RH) or deceleration (RM)
signal varies the set frequency.
4. When making frequent on/off of the start signal and frequency changes by the RH and RM
signals, set the frequency setting storage signal (write setting values into the E
(Pr. 59 = "2").
When the signal is set valid (Pr. 59 = "1"), frequent writing of frequencies into the E
shorten the life of the E
REMARKS
This function is invalid during jog operation and PID control operation.
When the set frequency is 0
• Even when the remotely-set frequency is cleared by turning on the RL (clear ) signal after turn off (on) of
both the RH and RM signals, the inverter operates at the remotely-set frequency stored in the last
operation if power is reapplied before one minute has elapsed since turn off (on) of both the RH and RM
signals.
Forward rotation (STF)
• When the remotely-set frequency is cleared by turning on the RL (clear) signal after turn off (on) of both
the RH and RM signals, the inverter operates at the frequency in the remotely-set frequency cleared
state if power is reapplied after one minute has elapsed since turn off (on) of both the RH and RM
signals.
Acceleration (RH)
Deceleration (RM)
Forward rotation (STF)
When selecting this function, re-set the maximum frequency according to the machine.
2
PROM.
Remotely -set frequency
stored in the last operation
Output
frequency
(Hz)
Acceleration (RH) ON
OFF
Deceleration (RM)
Clear (RL)
ON
ON
Power supply
Remotely -set frequency
stored in the last operation
More than
one minute
Output
frequency
(Hz)
ON
OFF
Clear (RL)
ON
ON
Power supply
CAUTION
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More than
one minute
Remotely -set frequency
stored in the last operation
ON
ON
ON
1 minute
Operation at a set
frequency of 0Hz
ON
ON
ON
99
PARAMETERS
2
PROM) invalid
2
PROM will
4