YASKAWA AC Drive-A1000 Technical Manual page 216

5.7 H: Terminal Functions
Setting 68: High Slip Braking
Closing an input programmed for this function triggers High Slip Braking (available only in V/f and V/f w/PG control modes).
After starting HSB, bring the drive to a complete stop and remove the HSB command before
Slip Braking (HSB) and Overexcitation Braking on page
Setting 6A: Drive Enable
A digital input configured as a "Drive enable" (H1-oo = 6A) will prevent the drive from executing a Run command until
the input is closed. When the input is open, the digital operator will display "dnE" to indicate that the drive is disabled.
If a Run command is enabled before the terminal set for "Drive enable" closes, then the drive will not run until the Run
command is cycled (i.e., a new Run command is required). If the input is opened while the drive is running, the drive will stop
according to the stop method set to b1-03
Setting 71: Speed/Torque Control Switch
Switches the drive between Torque Control and Speed Control. Torque Control is enabled when the terminal is closed, and
Speed Control is enabled when the terminal is open. Set parameter d5-01 to 0 when using this function.
Control on page 178 and
Setting 72: Zero Servo
Activates the Zero Servo function to lock the rotor at a certain position.
Setting 75, 76: Up 2/Down 2 Function
The Up/Down 2 function adds a bias to the frequency reference. The input programmed for 75 will increase the bias and the
input programmed for 76 will decrease the bias.
frequency reference source and parameters d4-01, d5-03, and d4-05.
2 Function on page 173
Note: 1. The Up/Down 2 functions must be set as a pair.
2. When using the Up/Down 2 function, set appropriate bias limit values to parameters d4-08 and d4-09.
Freq. Ref.
Condition
Source
1
2
Multi-Step Speed
Reference
3
4
Multi-Step Speed
Reference
5
216
(Refer to b1-03: Stopping Method Selection on page
Switching Between Torque and Speed Control
Table 5.33
for detailed explanations of these and other Up/Down 2 related parameters.
Table 5.33 Up/Down 2 Operations
d4-03 d4-05 d4-01
0
0
1
0
1 --
0
Value
other --
1
than 0
270.
on page 180.
Refer to b9: Zero Servo on page 153
explains how the Up/Down 2 function works depending on the
Refer to d4: Frequency Reference Hold and Up/Down
Operation
• Accelerates (increases the bias) while the Up 2
terminal is closed.
• Decelerates (decreases the bias) while Down 2 is
closed.
• Holds output frequency (holds the bias) when no
Up 2 or Down 2 input or both active.
• Resets the bias when the reference changes.
• Operates with the frequency reference in all other
situations.
• Accelerates (increases the bias) while the Up 2
terminal is closed.
• Decelerates (decreases the bias) while Down 2 is
closed.
• Otherwise operates at the frequency reference.
• When the Up 2 is enabled, the drive accelerates to
the frequency reference plus d4-03 (bias is
increased for d4-03).
• When Down 2 is enabled, the drive decelerates to
the frequency reference minus d4-03 (bias is
decreased for d4-03).
• Holds output frequency (holds the bias) when
neither Up/Down 2 inputs are active or both inputs
are active.
• Resets the bias when the reference changes.
• Operates with the frequency reference in all other
situations.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
restarting.Refer to n3: High
128).
Refer to d5: Torque
for details.
Frequency Saved
Not saved
If the bias and frequency reference
are constant for 5 s, the bias is
added to the active frequency
reference and reset afterwards.
Not saved
Not saved
If the bias and frequency reference
are constant for 5 s, the bias is
added to the active frequency
reference and reset afterwards.