Overload Advance Notice Signal - Hitachi L100 Series Instruction Manual

Overload Advance Notice Signal

When the output current exceeds a preset
value, the [OL] terminal signal turns ON.
The parameter C_41 sets the overload
threshold. The overload detection circuit
operates during powered motor opera-
tion and during regenerative braking. The
output circuits use open-collector
transistors, and are active low.
Option Terminal
Code Symbol
03 OL Overload Advance
Notice Signal
11, 12
Valid for outputs:
C_41
Required settings:
Notes:
•
The default value is 100%. To change the level
from the default, set C_41 (overload level).
•
The accuracy of this function is the same as the
function of the output current monitor on the [FM]
terminal (see page "Analog and Digital Monitor
Output" on page 4–30).
NOTE: The example circuit in the table above 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.
Output
Function Name
State
ON
OFF
L100 Inverter
Current
C 41
C 41
[OL] 1
ON
Signal 0
Description
when output current is more than the set thresh-
old for the overload signal
when output current is less than the set threshold
for the overload signal
Example (requires output configuration—
see page 3–36):
Inverter output
terminal circuit
H O OI L
+
See I/O specs on page 4–6.
4–25
threshold
power running
regeneration
threshold
ON
t
OL
FM CM2 12 11
RY
–