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Mitsubishi Electric FR-E720-0.1K(SC) Instruction Manual Page 270

Fr-e700 series.
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Useful functions
2) Setting of Pr. 555 Current average time
The average output current is calculated during Hi output of start pulse (1s). Set the time taken to average the current
during start bit output in Pr. 555.
3) Setting of Pr. 557 Current average value monitor signal output reference current
Set the reference (100%) for outputting the signal of the current average value. Obtain the time to output the signal from
the following calculation.
Output current average value
Pr. 557 setting
Note that the output time range is 0.5 to 9s and the output time is either of the
following values when the output current average value is the corresponding
percentage of the Pr. 557 setting.
Less than 10% ... 0.5s, more than 180% ... 9s
Example) when Pr. 557 = 10A and the average value of output current is 15A
As 15A/10A x 5s=7.5, the current average value monitor signal is
output as low pulse shape for 7.5s.
4) Setting of Pr. 503 Maintenance timer
After the output current average value is output as low pulse shape, the
maintenance timer value is output as high pulse shape. The output time of the
maintenance timer value is obtained from the following calculation.
Pr. 503 × 100
40000h
Note that the output time range is 2 to 9s, and it is 2s when the Pr. 503 setting is
less than 16000h and 9s when exceeds 72000h.
REMARKS
Mask of data output and sampling of output current are not performed during acceleration/deceleration.
When the speed is changed to acceleration/deceleration from constant speed during start pulse output, the data is judged as
invalid, the start pulse is output as high pulse shape for 3.5s, and the end signal is output as low pulse shape for 16.5s.
The signal is output for at least 1 cycle even when acceleration/deceleration state continues after the start pulse output is
completed.
Y93 signal
2) Start pulse
Output as high pulse shape for 3.5s
When the output current value (inverter output current monitor) is 0A on completion of the 1 cycle signal output, the signal is not
output until the speed becomes constant next time
The current average value monitor signal (Y93) is output as low pulse shape for 20s (without data output) under the following condition.
(a) When the motor is in the acceleration/deceleration state on completion of the 1 cycle signal output
(b) When 1-cycle signal output was ended during restart operation with the setting of automatic restart after instantaneous
power failure (Pr. 57 ≠ "9999")
(c) When restart operation was being performed at the point of data output mask end with the setting of automatic restart after
instantaneous power failure (Pr. 57 ≠ "9999")
NOTE
Changing the terminal assignment using Pr. 190 to Pr. 192 (output terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 57 Restart coasting time
Pr. 190 to Pr. 192 (output terminal function selection)
Pr. 503 Maintenance timer
270
× 5s (Output current average value 100%/5s)
× 5s (Maintenance timer value 100%/5s)
Output frequency
Previous cycle
Refer to page 162
Refer to page 268
The speed is changed to deceleration
from the constant speed during start pulse output
Invalid cycle (20s)
Refer to page 145
(s)
9
0.5
10
180
Output current average value
(s)
9
2
16000
72000
Maintenance timer value
Next cycle
5) End pulse
Output as low pulse shape for 16.5s
(%)
(h)
Time

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