Yaskawa Sigma Mini - Manual (Page 86)

APPLICATIONS
2.4.2 Zero-clamp cont.
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Cn-01
Setting Control Mode
Bit B Bit A
Control Mode
Zero-clamp Speed Control
This speed control allows the
zero-clamp function to be set when
the motor stops.
D
A speed reference is input from
V-REF.
D /P-CON is used to turn the
zero-clamp function ON or OFF.
Servopack
Speed reference
Zero-clamp
(CN1-12)
/P-CON
(CN1-1*)
0 1 /P-CON is open
(OFF)
Turns
zero-clamp
function OFF
Zero-clamp is performed when the
following two conditions are met:
/P-CON signal is closed.
/P-CON is
closed (ON)
Turns
zero-clamp
function ON
/P CON signal is closed.
Motor speed is below the value set
in Cn-0F (ZCLVL).
D Torque reference input T-REF
cannot be used.
Settings
Set the motor speed level at which zero-clamp is to be performed in the following parameter.
Cn-0F
ZCLVL Zero-clamp
Level
Unit:
min −1
Setting Range:
0 to Maximum
Speed
Factory
Setting:
10
For Speed/Torque
Control
If zero-clamp speed control is selected, set the motor speed level at which zero-clamp is to be
performed.
Conditions for Zero-clamp
Zero-clamp is performed when all the following conditions are met:
• Zero-clamp speed control is selected.(Bits A and B of memory switch Cn-01 are set to 1
and 0, respectively.)
• /P-CON is turned ON (0 V).
• Motor speed drops below the preset value.
Speed
V-REF speed reference
Preset value for
zero-clamp
/P-CON input
Zero-clamp being
performed
Open (OFF)
Closed (ON)
Time
2