Yaskawa AC Drive Z1000 AC Drive HVAC Fan User Manual
Page 77
Setting 19: PI Disable
Close a digital input to indefinitely disable the PI function. When the input is released, the drive resumes PI operation.
to PI Block Diagram on page 39
.
Setting 1B: Program Lockout
Parameter values cannot be changed when an input is programmed for Program Lockout and the input is open. It is still possible,
however, to view and monitor parameter settings.
Setting 1E: 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. When 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
Time
100 ms
Referenece
Sample Hold Input
Analog signal
100 ms
ON
OFF
Figure 1.36 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 command:
• Hold accel/decel stop (Setting: A)
• Up command, Down command (Setting: 10, 11)
• Offset frequency (Setting: 44 to 46)
Setting 20 to 2F: External Fault
The External fault command stops the drive when problems occur with external devices.
To use the External fault command, set one of the multi-function digital inputs to a value between 20 and 2F. The HOA keypad
will display EFo where o is the number of the terminal 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:
Terminal statuses, detection conditions, and stopping methods marked with an “O” are applicable to the corresponding settings.
Setting
Terminal Status
<1>
Detection Conditions
<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
-
-
-
1.7 H: Terminal Functions
YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual
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1
Parameter Details