249
4.20.4 Current average value monitor signal (Pr.555 to Pr.557)
The pulse output of the current average value monitor signal (Y93) is shown above.
For the terminal used for the Y93 signal output, assign the function by setting "93" (positive logic) or "193" (negative logic)
to
Pr.190 and Pr.191 (output terminal function selection)
. The function can not be assigned to
Pr.192 ABC terminal function
selection
.
1) Setting of
Pr.556 Data output mask time
The output current is unstable (transient state) right after the operation is changed from the acceleration/deceleration state
to the constant speed operation. Set the time for not obtaining (mask) transient state data in
Pr.556
.
The average value of the output current during
constant speed operation and the maintenance timer
value are output as a pulse to the current average
value monitor signal (Y93).
The pulse width output to the I/O module of the
programmable controller or the like can be used as a
guideline due to abrasion of machines and elongation
of belt and for aged deterioration of devices to know
the maintenance time.
The current average value monitor signal (Y93) is
output as pulse for 20s as 1 cycle and repeatedly
output during constant speed operation.
Parameter
number
Name
Initial value
Setting range
Description
555
Current average time
1s
0.1 to 1.0s
Time taken to average the current during start pulse
output (1s).
556
Data output mask time
0s
0 to 20s
Time for not obtaining (mask) transient state data.
557
Current average value
monitor signal output
reference current
Rated
motor
current
0 to 500A
Reference (100%) for outputting the signal of the
current average value.
The above parameters can be set when
Pr.160 Extended function display selection
= "0".
The above parameters allow its setting to be changed during operation in any operation mode even if "0" (initial value) is set in
Pr.77 Parameter write
selection
.
Refer to page 307
for the rated motor current.
Programmable controller
Output unit Input unit
Maintenance
time
Parts have
reached their life
Drive unit
1) Data output mask time
When the speed has changed to
constant from acceleration/deceleration,
Y93 signal is not output for
Pr.556
time.
2) Start pulse
Output as Hi pulse shape for 1s (fixed)
The output currents are averaged during the
time period set in
Pr.555
.
4) Maintenance timer pulse
The maintenance timer value (
Pr.503
) is
output as Hi pulse shape for 2 to 9s
(16000h to 72000h)
5) End pulse
Output as low pulse
shape for 1 to 16.5s
Time
Y93 signal
1 cycle (20s)
Next cycle
Rotation speed
From acceleration to constant speed operation
3) Output current average value pulse
The averaged current value is output for 0.5 to 9s
(10 to 180%) during start pulse output.
Signal output time =
Output current average value (A)
Pr.557
(A)
5s
Signal output time =
5s
Pr.503
100h
40000h
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