Mitsubishi Electric FR-A700 Technical Manual page 83

For the terminal used for the Y93 signal output, assign the
function by setting 93 (positive logic) or 193 (negative
logic) to a [Output terminal function selection]. (The function
can not be assigned to a relay output terminal.)
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 [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 bit output in [Pr.
555].
3) Setting of [Pr. 557 Current average value monitor
signal output reference current]
Set the reference (100%) for outputting the signal
of the current average value. Obtain the time to
output the signal from the following calculation.
Output current average value
[Pr. 557] Setting
Note that the output time range is 0.5 to 9s, and it
is 0.5s when the output current average value is
less than 10% of the [Pr. 557] setting and 9s when
exceeds 180%.
[Example] when [Pr. 557 = 10A] and output current
average value is 15A.
As 15A/10A
average value monitor signal is output as
low pulse shape for 7.5s.
(s)
9
0.5
10
Output current average value
4) Output of [Pr. 503 Maintenance timer]
After the output current average value is output as
low pulse shape, the maintenance timer value is
output as high pulse shape.
The output time of the maintenance timer value is
obtained from the following calculation.
[Pr. 503]
× 5s (Maintenance timer value 100%/5s)
40000h
Note that the output time range is 2 to 9s, and it is
2s when the [Pr. 503] setting is less than 16000h
and 9s when exceeds 72000h.
(s)
9
2
16000
Maintenance timer value
5s (output current
×
average value 100%/5s)
5s = 7.5, the current
180 (%)
72000 (h)
*1 Mask of data output and sampling of output current
are not performed during acceleration/deceleration.
*2 When the speed is changed to acceleration/
deceleration from constant speed during start pulse
output, the data is judged as invalid, the start pulse is
output as high pulse shape for 3.5s, and the end
signal is output as low pulse shape for 16.5s.
The signal is output for at least 1 cycle even when
acceleration/deceleration state continues after the
start pulse output is completed.
Previous cycle
Y93
signal
2) Start pulse
Output as high
pulse shape for
3.5s
*3 When the output current value (inverter output current
monitor) is 0A on completion of the 1 cycle signal
output, the signal is not output until the speed
becomes constant next time.
*4 The current average value monitor signal (Y93) is
output as low pulse shape for 20s (without data
output) under the following condition.
(a) When the motor is in the acceleration/deceleration
state on completion of the 1 cycle signal output
(b) When 1-cycle signal output was ended during
restart operation with the setting of automatic restart
after instantaneous power failure [Pr. 57
(c)
When restart operation was being performed at the
point of data output mask end with the setting of
automatic restart after instantaneous power failure
[Pr. 57
76
SPECIFICATIONS
The speed is changed to deceleration from
the constant speed during start pulse output
Invalid cycle (20s) Next cycle
5) End signal
Output as low pulse
shape for 16.5s
9999]
Time
9999]