YASKAWA E-7-Series SGD7S - Page 193

6.5 Speed Control
6.5.4 Zero Clamping
6-24
/ZCLAMP (Zero Clamping) Signal
Use the /ZCLAMP signal to enable zero clamping.
 When Using the Default Input Signal Allocations (Pn50A = n.0)
The /ZCLAMP signal is allocated to pin CN1-41 on the I/O signal connector by default.
 When Changing Input Signal Allocations (Pn50A = n.1)
You must allocate the /ZCLAMP signal. Allocate the signal with Pn50D = n.X (/ZCLAMP
(Zero Clamping Input) Signal Allocation).
Refer to the following section for details.
6.1.1
Input Signal Allocations on page 6-4
Enabling Zero Clamping
To enable using zero clamping, set the control method (Pn000 = n.X) to 0, 3, 4, 5, 6, 7, 9
or A. You can use zero clamping only for operation with speed control.
If Pn000 = n.X is set to 5, 6, 7, or 9, zero clamping will be disabled when the control
method is changed to any method other than speed control.
Type Signal Connector Pin No. Signal Status Meaning
Input /ZCLAMP CN1-41
ON (closed)
Zero clamping is applied if the input voltage of the
V-REF (Speed Reference Input) signal is equal to or
lower than the speed set for the zero clamping level
(Pn501 or Pn580).
OFF (open) Zero clamping is disabled.
Type Signal Connector Pin No. Signal Status Meaning
Input /ZCLAMP Must be allocated.
ON (closed)
Zero clamping is applied if the input voltage of the
V-REF (Speed Reference Input) signal is equal to or
lower than the speed set for the zero clamping level
(Pn501 or Pn580).
OFF (open) Zero clamping is disabled.
If you set the parameter to keep the /ZCLAMP always active (Pn50D = n.7) for speed con-
trol, zero clamping will be applied whenever the speed reference is equal to or lower than the
speed set for the zero clamping level. In this case, using the /ZCLAMP signal is not necessary.
Information
Parameter Control Method Used Input Signals
When
Enabled
Classification
Pn000
n.0 Speed control /ZCLAMP
After restart Setup
n.
3 Internal set speed control
/ZCLAMP, SPD-A,
SPD-B, SPD-D
n.
4
Switching between internal set
speed control and speed control
with analog references
/ZCLAMP, SPD-A,
SPD-B, SPD-D,
C-SEL
n.
5
Switching between internal set
speed control and position control
/ZCLAMP, SPD-A,
SPD-B, SPD-D,
C-SEL
n.
6
Switching between internal set
speed control and torque control
/ZCLAMP, SPD-A,
SPD-B, SPD-D,
C-SEL
n.
7
Switching between position con-
trol and speed control
/ZCLAMP, C-SEL
n.
9
Switching between torque control
and speed control
/ZCLAMP, C-SEL
n.A
Switching between speed control
with analog references and speed
control with zero clamping
/ZCLAMP