YASKAWA V1000 Technical Manual page 160

5.4 d: Reference Settings
n d4-05: Frequency Reference Bias Operation Mode Selection (Up/Down 2)
Determines if the bias value is held or not when the Up/Down 2 inputs are both released or both enabled. The parameter
is effective only when parameter d4-03 is set to 0.00.
No.
d4-05 Frequency Reference Bias Operation Mode Selection
Setting 0: Hold Bias Value
The bias value will be held if no input Up 2 or Down 2 is active.
Setting 1: Reset Bias Value
The bias is reset to 0% when both inputs Up 2 and Down 2 are either on or off. The drive will use the accel/decel time as
selected in d4-04 to accelerate or decelerate to the frequency reference value.
n d4-06: Frequency Reference Bias (Up/Down 2)
This parameter is used to save the frequency reference bias value set by the Up/Down 2 function. It is set as a percentage
of the maximum output frequency. The function of d4-06 depends on how the Up/Down 2 function is configured.
• This parameter is not normally used when the frequency reference is set by the digital operator. The user can set d4-06
to a certain value that will be applied when the operation is started, but it will be reset when the frequency reference
changes (including multi-step references) or will be disabled when d4-01 = 0 and the Run command is removed.
• When d4-01 = 0 and the frequency reference is set by an analog or pulse input, the value set in d4-06 is generally added
to or subtracted from the frequency reference.
• When d4-01 = 1 and the frequency reference is set by a different source than the digital operator, the bias value adjusted
with the Up/Down 2 inputs is stored in d4-06 when 5 s have passed after the Up 2 or Down 2 command release.
No.
d4-06
Conditions that Generally Reset or Disable Parameter d4-06
• When the Up/Down 2 function has not been assigned to the multi-function terminals
• When the frequency reference source has been changed (including LOCAL/REMOTE or external reference 1/external
reference 2 switch over by digital inputs)
• If d4-03 = 0 Hz, d4-05 = 1 and the Up/Down 2 commands are both open or both closed
• Any changes to the maximum frequency set to E1-04
n d4-07: Analog Frequency Reference Fluctuation Limit (Up/Down 2)
This parameter is for handling changes in the frequency reference while the terminal set for Up 2 or Down 2 is enabled.
If the frequency reference changes for more than the level set to d4-07, then the bias value will be held, and the drive will
accelerate or decelerate following the frequency reference. When the frequency reference is reached, the bias hold is
released and the bias follows the Up/Down 2 input commands.
Parameter d4-07 is applicable only if the frequency reference is set by an analog or pulse input.
No.
d4-07
n d4-08: Frequency Reference Bias Upper Limit (Up/Down 2)
Parameter d4-08 sets the upper limit of the Up/Down 2 bias (monitor U6-20) and the value that can be saved in parameter
d4-06. Set this parameter to an appropriate value before using the Up/Down 2 function.
Note: When the frequency reference is set by the digital operator (b1-01 = 0) and d4-01 = 1, the bias value will be added to the frequency
reference if no Up/Down 2 command is received for 5 s, and will be reset to 0 afterwards. From that point the bias can be increased up
to the limit set in d4-08 again.
No.
d4-08
<1> Default setting is determined by the software version.
PRG: 1016 and later: 100.00%
PRG: 1015 and earlier: 0.00%
160
Parameter Name
Parameter Name
Frequency Reference Bias
Parameter Name
Analog Frequency Reference Fluctuation Limit
Parameter Name
Frequency Reference Bias Upper Limit
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Setting Range
0 or 1
Setting Range
-99.9 to 100.0%
Setting Range
0.1 to 100.0%
Setting Range
0.0 to 100.0%
Default
0
Default
0.0%
Default
1.0%
Default
<1>