Mitsubishi Electric FR-A820-00046 Instruction Manual page 440

(E) Environment setting parameters
Operation example
● The pulse output of Current average monitor signal (Y93) is indicated below.
● For the terminal used for Y93 signal output, assign the function by setting "93 (positive logic)" or
"193 (negative logic)" in any of Pr. 190 to Pr. 194 (output terminal function selection). (This cannot
be assigned by setting in Pr. 195 "ABC1 terminal function selection" or Pr. 196 "ABC2 terminal
function selection".)
Fig. 5-82:
Pr. 556 "Data output mask time setting"
● Immediately after acceleration/deceleration is shifted to constant-speed operation, the output
current is unstable (transitional state). Set the time for not obtaining (masking) transitional state
data in Pr. 556.
Pr. 555 "Current average time setting"
● The output current average is calculated during start pulse (1 s) 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
The output time range is 0.5 to 9 s. When the output current average value is less than 10% of the set-
ting value in Pr. 557, the output time is 0.5 s, and when it is more than 180%, the output time is 9 s.
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 value monitor signal is Low output in 7.5 s intervals.
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Y93 signal
Data output mask time
When the speed has changed to constant from
acceleration/deceleration, Y93 signal is not output
for Pr. 556 time.
Start pulse
Output as Hi pulse shape for 1s (fixed). The output currents
are averaged during the time period set in Pr. 555.
Output current average value pulse
The averaged current value is output as low pulse shape for 0.5 to
9 s (10 to 180 %) during start pulse output.
Output current average value (A)
Signal output time =
Pr. 557 (A)
Output of the pulse signal Y93
× 5 s (Output current average value 100%/5 s)
Pr. 557 setting value
Output current average value
From acceleration to constant speed operation
Output
frequency
1 cycle (20 s)
Maintenance timer pulse
The maintenance timer value (Pr. 503) is output as Hi
output pulse shape for 2 to 9 s (16000 h to 72000 h).
Signal output time =
× 5 s
Fig. 5-83:
Signal output time for the current average value
Parameters
Time
Next cycle
End pulse
output as low pulse shape
for 1 to 16.5 s
Pr. 503 × 1000 h
× 5 s
40000 h
I001265E
I001266E