![YASKAWA U1000 Series Скачать руководство пользователя страница 188](http://html.mh-extra.com/html/yaskawa/u1000-series/u1000-series_technical-manual_907114188.webp)
5.2 b: Application
188
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Setting 3: Zero Speed Control
The drive applies Zero Speed Control whenever the frequency reference setting is below the value of parameter E1-09.
When the drive is operating in the frequency set to E1-09 or more and the Run command is removed, Zero Speed Control
is activated for the time set in b2-04, even if it was already active before.
Figure 5.14
Figure 5.14 Zero Speed Control
■
b1-06: Digital Input Reading
This parameter defines how the digital inputs are read. Depending on this setting, the drive will take either 1 ms or 2 ms
to act upon a signal received over the digital inputs.
Setting 0: Read once (1 ms scan)
The state of a digital input is read once. If the state has changed, the input command is immediately processed. With this
setting the drive responds more quickly to digital inputs, but a noisy signal could cause erroneous operation.
Setting 1: Read twice (2 ms scan)
The state of a digital input is read twice. Only if the state does not change during the double reading, the input command
is processed. This reading process is slower but more resistant against noisy signals.
■
b1-07: LOCAL/REMOTE Run Selection
The drive has three separate control sources that can be switched using digital inputs (H1-
= 1 (LOCAL/REMOTE
Selection) or 2 (External reference 1/2)) or the LO/RE key on the digital operator.
Refer to Setting 1: LOCAL/REMOTE
Setting 2: External reference 1/2 selection on page 267
and
Key Function Selection on page 332
• LOCAL: Digital operator. The digital operator is used to set the frequency reference and Run command.
• REMOTE: External reference 1. The frequency reference and Run command source are set by b1-01 and b1-02.
• REMOTE: External reference 2. The frequency reference and Run command source are set by b1-15 and b1-16.
When switching from LOCAL to REMOTE, or between External reference 1 and External reference 2, the Run
command may already be present at the location the source was switched to. Parameter b1-07 can be used to determine
how the Run command is treated in this case.
Setting 0: Run command must be cycled
When the Run command source is different in the old and new source (e.g., the old source was the terminals and the new
source is serial communication), and the Run command is active at the new source as the switch over occurs, the drive
will not start or will stop operation if it was running before. The Run command has to be cycled at the new source in
order to start the drive again.
Setting 1: Accept Run command at the new source
When the Run command is active at the new source, the drive starts or continues operation if it was running before.
WARNING!
The drive may start unexpectedly if switching control sources when b1-07 = 1. Clear all personnel away from rotating
machinery and electrical connections prior to switching control sources. Failure to comply may cause death or serious injury.
No.
Name
Setting Range
Default
b1-06
Digital Input Reading
0 or 1
1
No.
Parameter Name
Setting Range
Default
b1-07
LOCAL/REMOTE Run Selection
0 or 1
0
Zero
Speed
Control
b2-01 DC
Injection Braking
Start Frequency
Run
Command
Frequency
reference
Motor
Speed
OFF
ON
Zero Speed
Control
E1-09 Min.
Output Frequency
b2-04
DC Injection Braking Time at Stop
E1-09
b2-03
DC Injection Braking Time at Start
IM: Initial Excitation
PM: Zero Spd. Contr.
SIEP_C710636_02B_1_0.book 188 ページ 2015年11月25日 水曜日 午後4時56分