Mitsubishi Electric 800 Series Instruction Manual page 155

 Pr.555 Current average time setting
• The output current average is calculated during start pulse (1 second) HIGH output. Set the time for calculating the average
current during start pulse output in Pr.555.
 Pr.557 Current average value monitor signal output reference current
setting
Set the reference (100%) for outputting the output current average value signal. The signal output time is calculated with the
following formula.
Output current average value
Pr.557 setting value
The output time range is 0.5 to 9 seconds. When the output current average value is less than 10% of the setting value in
Pr.557, the output time is 0.5 second, and when it is more than 180%, the output time is 9 seconds.
For example, when Pr.557 = 10 A and the output current average value is 15 A:
15 A/10 A × 5 s = 7.5 s, thus the Current average monitor signal maintains LOW output for 7.5 seconds.
(s)
9
0.5
10
Output current average value
 Pr.503 Maintenance timer output
After LOW output of the output current value is performed, HIGH output of the maintenance timer value is performed. The
maintenance timer value output time is calculated with the following formula.
Pr.503 × 100
40000h
The output time range is 2 to 9 seconds. When Pr.503 is less than 16000 hours, the output time is 2 seconds. When it is more
than 72000 hours, the output time is 9 seconds.
(s)
9
2
16000
Maintenance timer value
154
7. (E) Environment Setting Parameters
7.15 Current average value monitor signal
× 5 s (Output current average value 100%/5 s)
180 (%)
× 5 s (Maintenance timer value 100%/5 s)
72000 (h)