Overload advance notice signal – Hitachi X200 Series User Manual
Page 179
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 circuits use open-collector
transistors, and are active low.
Option
Code
Terminal
Symbol
Function Name
State
Description
ON
when output current is more than the set
threshold for the overload signal
03
OL
Overload Advance
Notice Signal
OFF when output current is less than the set threshold
for the overload signal
Valid for inputs:
11, AL0 – AL2
Required settings
C041
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
“Analog Output Operation”
on page 4–55
).
• The example circuit for terminal [11] drives a
relay coil. Note the use of a diode to prevent the
negativegoing turn-off spike generated by the
coil from damaging the inverter’s output
transistor.
Example for terminal [11] (default output
configuration shown – see
page 3-35
):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
page 4-35 and 3-54
):
See I/O specs on
page 4-6
RY
Inverter output
terminal circuit
CM2
11
OL
AL1
Power
supply
Load
AL0
AL2
Inverter logic
circuit board
OL
t
Output
current
Threshold
Threshold
C041
C041
Power running
Regeneration
0
1
[OL]
signal
ON
ON
4−40
Operatio
ns and
Monitori
ng