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Sigma II User's Manual
5.4.3
Using the Zero Clamp Function
n
Zero Clamp Function
The zero clamp function is used for systems where the host controller does not form
a position loop for the speed reference input. In other words, this function is used to
stop and lock the servomotor even when the input voltage of speed reference V-REF
is not 0V. An internal position loop is temporarily formed to clamp the servomotor
within one pulse when the zero clamp function is turned ON. Even if the servomotor
is forcibly rotated by external force, it will still return to the zero clamp position.
n
Parameter Setting
Set the following parameter so that the input signal /P-CON (/ZCLAMP) can be
used to enable or disable the zero clamp function.
Parameter
Pn000.1
Control Method Selection
ð Input /P-CON CN1-41
Note: The /ZCLAMP signal can be used when an input circuit signal is allocated. See 5.3.3 Input Circuit
Signal Allocation for more details.
Speed reference
Host controller
(/Z-CLAMP)
Signal
Proportional Control, etc.
Chapter 5: Parameter Settings and Functions
A speed reference lower than
the Pn501 setting is ignored.
V-REF
/P-CON
Setting
(ms)
Default Setting: 0
Speed/Torque Control,
Position Control
5-62
Stops
precisely.
Description
Speed Control
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