YASKAWA A1000 Series Technical Manual page 142

5.2 b: Application
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 Run command is removed, Zero Speed Control is activated for the time set in b2-04, even if it was already
active before.
Figure 5.12
b1-06: Digital Input Reading
■
This parameter defines how the digital inputs are read.
No.
b1-06
Setting 0: Read once
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
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-
Selection) or 2 (External reference 1/2)) or the LO/RE key on the digital operator.
selection on page 215, Refer to Setting 2: External reference 1/2 selection on page 216
(LOCAL/REMOTE) Key Function Selection on page 285
• 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.
No.
b1-07
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.
142
Run OFF ON
Command
Frequency
reference
Zero
Speed
IM: Initial Excitation
Control
PM: Zero Spd. Contr.
Motor
Speed b2-03
Zero Speed Time at Start
Figure 5.12 Zero Speed Control
Name
Digital Input Reading
Parameter Name
LOCAL/REMOTE Run Selection
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
E1-09 Min.
Frequency
E1-09
b2-01 Zero
Speed Level
b2-04
Zero Speed Time at Stop
Setting Range
Refer to Setting 1: LOCAL/REMOTE
for details.
Setting Range
common_TMonly
Zero Speed
Control
0 or 1
= 1 (LOCAL/REMOTE
and Refer to o2-01: LO/RE
0 or 1
Default
1
Default
0