Toshiba VF-SX - Manual (Page 94)

TOSHIBA 10-7
10.6 Low Speed Signal Output and Speed Reached
Signal Output [ L F , L F H L , F r C H , r C H , r r C H ]
These functions allow the drive to signal when certain output frequencies,
parameters, or conditions have been reached or exceeded. When the output
frequency reaches the preset low speed during operation and when the output
frequency reaches the set frequency, the "reached" signal will enabled.
10.6.1 Low Speed Signal Output Frequency [ L f J
and Speed Reached Logic Signal I L F H L ]
The low speed signal output frequency [/. f ] can be set between 0 Hz and the
maximum frequency. The signal output can also be selected logically. Implement
this feature with the parameter [
L F H L ] .
This [ L F H L ] signal is an open collector transistor used to send a signal
to a remote device, defining the status of low speed, as shown below.
TABLE 10-7: DEFINITIONS OF OPEN COLLECTOR TRANSISTOR OUTPUT FOR LOW SPEED SIGNAL
[ L F H L ]
Value
Function
0
1
Open collector transistor output OFF when under low
speed signal output frequency. [
L F ]
Open collector transistor output ON when under low
speed signal output frequency. [
L F ]
10.6.2 Speed Reached Signal Output [ r C H ]
The speed reach specifying frequency can be set in parameter [
F r C H ]
and the
speed reached conditions are set in parameter
i r C H ] .
TABLE 10-8: DEFINITIONS OF TRANSISTOR OUTPUT FOR SPEED REACHED SIGNAL
i r C H ] Value
Function
a
1
Open collector transistor output ON when
acceleration/deceleration is completed.
Open collector transistor output ON when specified
frequency [ F r C H ] is reached.