# Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 348

Fr-a800 series.

• For the terminal used for the 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.)
Y93 signal
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 1 s (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)
 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 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 seconds, 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 value monitor signal is Low output in 7.5 s intervals.
(s)
9
0.5
10
180
Output current average value
 Pr.503 Maintenance timer 1 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.530 × 100
40000h
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 (16000h to
72000h).
Signal output time=
5 s
× 5 s
(Output current average value 100%/5 s)
(%)
× 5 s
(Maintenance timer value 100%/5 s)
Time
Next cycle
End pulse
output as low pulse
shape for 1 to 16.5 s
Pr. 503
100h
5 s
40000h
5.7 (E) Environment setting parameters
1
2
3
4
5
6
7
8
9
10
347
5. PARAMETERS