129
Function assignment of external terminal and control
(2) Zero current detection (Y13 signal,
Pr. 152, Pr. 153
)
If the output during drive unit running is the
Pr. 152
setting or
lower for the time set in
Pr. 153
or longer, the Zero current
detection (Y13) signal is output from the drive unit's open
collector or relay output terminal.
When the drive unit's output current falls to "0", torque will
not be generated. This may cause a drop due to gravity
when the drive unit is used in vertical lift application.
To prevent this, the Y13 signal can be output from the drive
unit to close the mechanical brake when the output current
has fallen to "zero".
For the Y13 signal, set "13 (positive logic) or 113 (negative
logic)" in
Pr.
190
or
Pr. 192 (output terminal function selection)
and assign functions to the output terminal.
REMARKS
The response time of Y12 and Y13 signals is approximately 0.1s. Note that the response time changes according to the load
condition.
When
Pr. 152
= "0", detection is disabled.
NOTE
Changing the terminal assignment using
Pr. 190, Pr. 192 (output terminal function selection)
may affect the other functions.
Set parameters after confirming the function of each terminal.
CAUTION
The zero current detection level setting should not be too low, and the zero current detection time setting not
too long. Otherwise, the detection signal may not be output when torque is not generated at a low output
current.
To prevent the machine and equipment from resulting in hazardous conditions detection signal, install a
safety backup such as an emergency brake even the zero current detection function is set valid.
Parameters referred to
Pr. 190, Pr. 192 (output terminal function selection)
OFF
ON
Start signal
Time
Output current
OFF
ON
Zero current
detection time
(Y13)
Pr. 153
Detection time
Pr. 153
Detection time
Pr. 152
OFF
ON
0[A]
0.1s*
Pr. 152
* The Zero current detection (Y13) signal holds the
signal for approximately 0.1s once turned ON.
Summary of Contents for FR-D720-0.2K-G
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