Mitsubishi Electric FR-F720-00046 Instruction Manual page 269

Useful functions
(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 it is 0.5s when the output current
average value is less than 10% of the setting value of Pr. 557 and 9s when exceeds
180%.
Example)When Pr. 557 = 10A and the average value of output current is 15A
As 15A/10A × 5s = 7.5, the current average value monitor signal is output
as low pulse shape for 7.5s.
(4) Output 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 Pr. 503 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 bit output, the data is
judged as invalid, the start bit 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 bit
output is completed.
⋅ 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 automatic restart operation was being performed with automatic restart after instantaneous power failure selected (Pr.
57 ≠ "9999") on completion of the data output mask
CAUTION
⋅ Changing the terminal assignment using Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions.
Please make setting after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 190 to Pr. 196(output terminal function selection)
Pr. 503 Maintenance timer
Pr. 57 Restart coasting time
260
× 5s (output current average value 100%/5s)
× 5s
(maintenance timer value 100%/5s)
Refer to page 122
Refer to page 258
Refer to page 142
The speed is changed to deceleration from
Output frequency
the constant speed during start bit output
Previous cycle Invalid cycle (20s)
Y93
signal
2) Start bit
Output as high
pulse shape for
3.5s
(s)
9
0.5
10 180 (%)
Output current average value
(s)
9
2
16000 72000 (h)
Maintenance timer value
Time
Next cycle
5) End signal
Output as low pulse
shape for 16.5s