YASKAWA V1000 Series Technical Manual page 162

5.7 H: Terminal Functions
When any of the multi-function contact input selections (H1-01 to H1-06) are set to 7 and 1A, up to four acceleration and deceleration times can then be
selected by opening and closing the appropriate accel/decel time selection commands (terminals 3 to 8).
to 4 on page 131.
Setting 8: External Baseblock, N.O.
Setting 9: External Baseblock, N.C.
Settings of 8 and 9 assign the baseblock command to the external terminals. When the drive is commanded into baseblock, gating of the output transistor
stops and output voltage/frequency drops to 0 (i.e., the motor coasts). During this time, the alarm "bb" flashes will flash on the LED operator to indicate
baseblock. When baseblock ends, the drive performs Speed Search to get the motor running again.
Status
Open
Closed
Setting 9 (instead of 8) reverses the table above: baseblock will execute when the terminal is open.
The drive has two ways to find the speed of the motor: Current Detection Speed Search and Speed Estimation. The method used when the baseblock input
is removed is determined by b3-24.
NOTICE: Do not use the baseblock excessively with hoist-type applications. Failure to comply will result in sudden motor coasting when the baseblock command is entered, causing
the load to slip.
External Baseblock Characteristics
Function A: Accel/Decel Ramp Hold
The Accel/Decel Ramp Hold function will clamp ("hold") the speed of the output frequency whenever a digital input that has been programmed for it
(H1-oo = A) is closed. All acceleration or deceleration will cease, and the drive will hold the current speed. Once the input is opened again, acceleration
or deceleration resumes.
If the Accel/Decel Ramp Hold function is enabled (d4-01 = 1), the drive will save the output frequency to memory whenever the Ramp Hold input is
closed. When the interrupted power is restored and a new Run command is entered, the frequency reference becomes the frequency reference that was
saved (provided that the Accel/Decel Ramp Hold input is still closed).
No. Parameter Name
Frequency Reference Hold Function
d4-01
Selection
Function B: Drive Overheat Alarm (OH2)
Triggers an OH2 alarm when the contact closes. Because this is an alarm, drive operation is not affected.
Function C: Terminal A2 Enable
Causes the input to analog input terminals A1 and A2 to be ignored unless the contact is closed.
For more information on multi-function analog input settings,
Status
Open
Closed
No.
H3-09 * Terminal A2 Signal Level Selection
H3-11
*1. When using terminal A2, make sure DIP switch S1 is set appropriately for the type of input used (current or voltage).
*2. By tuning the gain and bias levels, an input of less than 5 V can be treated as a negative value.
162
OFF ON
Run command
baseblock input
frequency
reference
output frequency
0: Disabled. Drive starts the motor with a frequency reference of 0 if the power is interrupted.
1: Enabled. Drive starts the motor at the frequency reference that was saved just before the power went out.
Refer to H3-01: Terminal A1 Signal Level Selection on page 179
Parameter Name
Terminal A2 Gain Setting
Description
Normal operation
Interrupt output (baseblock)
baseblock
input
release
begin Speed Search from the
previous frequency reference
hold
Setting Range
Description
Disables terminals A1, A2
Enables terminals A1, A2
Setting Range
0: 0 to +10 V (with lower limit)
1: 10 to 10 V (no lower limit)
2: 4 to 20 mA (9 bit input)
3: 0 to 20 mA
-999.9 to 999.9f
YASKAWA ELECTRIC SIEP C710606 18A YASKAWA AC Drive – V1000 Technical Manual (Preliminary)
Refer to C1-01 to C1-08: Accel/Decel Times 1
Default
0
Default
2
100.0%