Mitsubishi Electronics FR-A720-0.4k to 90k 用户手册

⋅ 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 any of Pr. 190 to Pr. 194 (output terminal function selection). (The function cannot be assigned to Pr. 195 ABC1 
terminal function selection and Pr. 196 ABC2 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.

(2) Setting of the Pr. 555 Current average time

The average output current is calculated during Hi output of start pulse (1s). Set the time taken to average the
current during start pulse output in Pr. 555.

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 etc. 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.

1s

0.1 to 1.0s

Set the time taken to average 
the current during start pulse 
output (1s).

0s

0.0 to 20.0s

Set the time for not obtaining 
(mask) transient state data.

Rated inverter 

current

55K or lower

0 to 500A

Set the reference (100%) for 
outputting the signal of the 
current average value.

75K or higher

0 to 3600A

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.

Programmable controller

Output 
unit

Input 
unit

maintenance 
time

parts have 
reached their life

Inverter

Y93 signal

1) Data output mask time

2) Start pulse

1 cycle (20s)

3) Output current average value pulse

Next cycle

Time

Output 
frequency

From acceleration to constant speed operation

Signal output time=

output current average value (A)

Pr. 557 (A)

5s

4) Maintenance timer pulse 

Signal output time=

5s

40000h

5) End pulse 

The averaged current value is output as low pulse shape for 
0.5 to 9s (10 to 180%) during start pulse output.

When the speed has changed to constant 
from acceleration/deceleration, Y93 signal is 
not output for Pr. 556 time.

Pr. 503     100h

output as low pulse 
shape for 1 to 16.5s

The maintenance timer value (Pr. 503) is output 
as Hi output pulse shape for 2 to 9s (16000h to 
72000h).

Output as Hi pulse shape for 1s (fixed) 
The output currents are averaged during the time 
period set in Pr.555.