Current Average Value Monitor Signal - Mitsubishi Electric 800 Series Instruction Manual

5.7.18

Current average value monitor signal

The output current average value during constant-
speed operation and the maintenance timer value are
output to the Current average monitor (Y93) signal as
a pulse. The output pulse width can be used in a
device such as the I/O unit of a programmable
controller as a guideline for the maintenance time for
mechanical wear, belt stretching, or deterioration of
devices with age.
The pulse is repeatedly output during constant-speed
operation in cycles of 20 s to the Current average
monitor (Y93) signal.
Pr. Name
555
Current average time
E720
556
Data output mask time
E721
Current average value
557
monitor signal output
E722
reference current

Initial value for the FR-A860-01080 or lower.

Initial value for the FR-A860-01440 or higher.
Operation example
• The pulse output of the Current average monitor (Y93) signal 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.)
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 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 s) HIGH output. Set the time for calculating the average
current during start pulse output in Pr.555.
Initial value Setting range
1 s 0.1 to 1 s
0 s 0 to 20 s
0 to 500 A
Inverter rated
current
0 to 3600 A
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).
Pr.503
Signal output time=
5 s
(E) Environment setting parameters
Programmable controller
maintenance
time
parts have
reached their life
Set the time for calculating the average
current during start pulse output (1 s).
Set the time for not obtaining (masking)
transitional state data.

Set the reference (100%) for outputting
the output current average value signal.

Time
Next cycle
End pulse
output as low pulse
shape for 1 to 16.5 s
100 h
5 s
40000 h
Output Input
unit unit
Inverter
Description
267
PARAMETERS
5
GROUP
E