Overload Advance Notice Signal - Hitachi X200 Series Instruction Manual

4 42
4 42

Overload Advance Notice Signal

When the output current exceeds a preset
value, the [OL] terminal signal turns ON.
The parameter C041 sets the overload
threshold. The overload detection circuit
operates during powered motor operation
and during regenerative braking. The
output
transistors, and are active low.
Option Terminal
Code Symbol
03 OL
Valid for inputs:
Required settings
Notes:
The default value is 100%. To change the level
from the default, set C041 (overload level).
The accuracy of this function is the same as the
function of the output current monitor on the
[FM] terminal (see
on page 4–55).
The example circuit for terminal [11] drives a
relay coil. Note the use of a diode to prevent the
negative-going turn-off spike generated by the
coil from damaging the inverter's output
transistor.
circuits use open-collector
Function Name
Overload Advance
Notice Signal
11, AL0 – AL2
C041
"Analog Output Operation"
Output
current
C041
C041
Threshold
[OL] 1
signal
0
State
ON when output current is more than the set
threshold for the overload signal
OFF when output current is less than the set threshold
for the overload signal
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
Power
supply
See I/O specs on
Threshold
Power running
Regeneration
ON ON
Description
page 3-35):
OL
CM2 11
RY
page 4-35 and 3-54):
OL
AL0 AL1 AL2
Load
page 4-6
t