Setting 1E: Analog Frequency Reference Sample/Hold
This function allows the user to sample an analog frequency reference signal being input to terminal A1 or A2 and hold the
frequency reference at the sampled level. Once the Analog Frequency Reference Sample/Hold function is held for at least 100
ms, the drive reads the analog input and changes the frequency reference to the newly sampled speed as illustrated in
.
When the power is shut off and the sampled analog frequency reference is cleared, the frequency reference is reset to 0.
Frequency
reference
ON (closed)
OFF (open)
Time
100 ms
Analog signal
100 ms
Reference
Sample Hold Input
Figure 5.52 Analog Frequency Reference Sample/Hold
An oPE03 error will occur when one of the following functions is used simultaneously with the Analog Frequency Reference
Sample/Hold function.
• Hold Accel/Decel Stop (setting: A)
• Up command, Down command (setting: 10, 11)
• Offset Frequency (setting: 44 to 46)
• Up or Down functions (setting: 75, 76)
Setting 20 to 2F: External Fault
By using the External Fault function, the drive can be stopped when problems occur with external devices.
To use the external fault function, set one of the multi-function digital inputs to any value between 20 to 2F. The operator will
display EF
o
where
o
is the number of the terminal (terminal S
o
) to which the external fault signal is assigned.
For example, if an external fault signal is input to terminal S3, “EF3” will be displayed.
Select the value to be set in H1-
oo
from a combination of any of the following three conditions:
• Signal input level from peripheral devices (N.O./N.C.)
• External fault detection method
• Operation after external fault detection
The following table shows the relationship between the conditions and the value set to H1-
oo
:
Setting
Terminal Status
<1>
Detection Method
<2>
Stopping Method
N.O.
N.C.
Always
Detected
Detected
during Run
only
Ramp to Stop
(fault)
Coast to Stop
(fault)
Fast-stop
(fault)
Alarm Only
(continue
running)
20
O
O
O
21
O
O
O
22
O
O
O
23
O
O
O
24
O
O
O
25
O
O
O
26
O
O
O
27
O
O
O
28
O
O
O
29
O
O
O
2A
O
O
O
2B
O
O
O
5.7 H: Terminal Functions
190
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
