YASKAWA FSDrive-MV1000 Parameter Manual page 175

Setting 75, 76: Up 2, Down 2 command
The Up 2 and Down 2 function can be used to add a bias to the frequency reference. The input programmed for 75 (Up 2
function) will increase the bias and the input programmed for 76 (Down 2 function) will decrease it.
how the Up/Down 2 function works depending on the frequency reference source and parameters d4-01, d4-03, and d4-
05. Refer to d4: Frequency Reference Hold and Up/Down 2 Function on page 139
and other Up/Down 2 related parameters.
Note: 1. The Up 2 and Down 2 functions must be set as a pair.
2. When using the Up 2 and Down 2, set appropriate bias limit values to parameters d4-08 and d4-09.
Conditi Freq. Ref.
on Source
1
2
Multi-Step Speed
Reference
3
4
Multi-Step Speed
Reference
5
6
Other
(analog comm.,
7
etc.)
8
9
Other
(analog comm,
etc.)
10
YASKAWA ELECTRIC EZZ010930 FSDrive-MV1000 Parameter Guide
Table 2.23 Up/Down 2 Operations
d4-03 d4-05 d4-01
0 • Accelerates (increases the bias) while the Up 2
terminal is closed.
• Decelerates (decreases the bias) while Down 2 is
closed.
0 • Holds output frequency (holds the bias) when no
1
Up 2 or Down 2 input or both active.
• Resets the bias when the reference changes.
0
• Operates with the frequency reference in all other
situations.
• Accelerates (increases the bias) while the Up 2
terminal is closed.
1 -- • Decelerates (decreases the bias) while Down 2 is
closed.
• Otherwise operates at the frequency reference.
0 • When the Up 2 is enabled, drive accelerates up to
the frequency reference plus d4-03 (bias is
increased for d4-03).
• When Down 2 is enabled, drive decelerates down
Value to the frequency reference minus d4-03 (bias is
other -- decreased for d4-03).
1
than 0 • 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.
0 • Accelerates (increases the bias) while the Up 2
terminal is closed.
• Decelerates (decreases the bias) while Down 2 is
closed.
0 0 • Holds output frequency (holds the bias) when no
1
Up 2 or Down 2 input or both active.
• If the frequency reference changes for more than
d4-07 during accel/decel, bias value is held until the
output frequency meets the reference (speed agree).
• Accelerates (increases the bias) while the Up 2
terminal is closed.
0 1 -- • Decelerates (decreases the bias) while Down 2 is
closed.
• Otherwise operates at the frequency reference
0 • When Up 2 is enabled, drive accelerates up to the
frequency reference plus d4-03 (increases the bias
for d4-03).
Value • When Down 2 is enabled, drive decelerates down
other -- to the frequency reference minus d4-03 (decreases
1
than 0 the bias for d4-03).
• If the frequency reference changes for more then
d4-07 during accel/decel, bias value is held until the
output frequency meets the reference (speed agree).
2.7 H: Terminal Functions
for detailed explanations of these
Operation
Table 2.23 explains
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.
Not saved
If the bias is constant for 5 s, it is
saved to parameter d4-06. The
frequency reference cannot be
overwritten, so only the bias is
saved.
Not saved
Not saved
If the bias is constant for 5 s, it is
saved to parameter d4-06. The
frequency reference cannot be
overwritten, so only the bias is
saved.
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