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Useful functions
4
PARAMETERS
(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 formula.
(4) Output of Pr. 503 Maintenance timer
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.
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 formula.
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 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.
⋅ 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
⋅ When terminal assignment is changed using Pr. 190 to Pr. 196 (output terminal function selection), the other functions may be
affected. Set parameters after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 190 to Pr. 196(output terminal function selection) Refer to page 239
Pr. 503 Maintenance timer Refer to page 389
Pr. 57 Restart coasting time Refer to page 266
Output current average value
× 5s (output current average value 100%/5s)
Pr. 557 setting
9
0.5
10
(%)
(s)
Output current average value
180
Signal output time
Pr. 503 × 100
× 5s (maintenance timer value 100%/5s)
40000h
9
2
16000
(h)
(s)
Maintenance timer value
72000
Signal output time
5) End signal
Y93
signal
2) Start pulse
Invalid cycle (20s) Next cycle
Time
Output frequency
The speed is changed to deceleration from
the constant speed during start pulse output
Previous cycle
Output as high
pulse shape for
3.5s
Output as low pulse
shape for 16.5s