Mitsubishi Electric FR-E700 Instruction Manual page 480

Useful functions
Setting of the Pr. 555 "Current average time"
The average output current is calculated during Hi output of start bit (1 s). Set the time taken to av-
erage the current during start bit output in Pr. 555.
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 of the
low pulse after a fixed start pulse of 1 s from the following calculation.
Output current average value
------------------------------------------------------------------------------- - 5 s (output current average value 100%/5 s)
Note that the output time range is 0.5 to 9 s, and it is 0.5 s when the output current average value is
less than 10% of the setting value of Pr. 557 and 9s when it exceeds 180%.
Example When Pr. 557 = 10 A and the average value of output current is 15 A, the current average value
monitor signal is output as low pulse shape for 7.5 s.
Signal output time
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 fol-
lowing calculation.
Pr. 503 100
--------------------------------- 5s (Maintenance timer value 100%/5 s)
40000 h
Note that the output time range is 2 to 9 s, and it is 2 s when Pr. 503 is less than16000 h and 9 s when
it exceeds 72000 h.
6 - 326
Pr. 557
(s)
Output current average value
15 A
= ----------- - 5s = 7.5 s
10 A
(s)
(h)
Maintenance timer value
Fig. 6-170:
Signal output time for the current average value
Fig. 6-171:
Signal output time for the maintenance output
value
Parameter
I001266E
I001267E