YASKAWA A1000 Technical Manual page 241

Setting 1A: Accel/decel time selection 2
Used to select accel/decel times 1 to 4 in combination with the Accel/decel time selection 1 command.
C1-08: Accel, Decel Times 1 to 4 on page 183
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, A2, or A3 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 Figure 5.65.
When the power is shut off and the sampled analog frequency reference is cleared, the frequency reference is reset to 0.
Figure 5.65
Referenece
Sample Hold Input
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)
• Up or Down functions (setting: 75, 76)
Setting 20 to 2F: External fault
By using the External fault command, the drive can be stopped when problems occur with external devices.
To use the External fault command, set one of the multi-function digital inputs to any value between 20 to 2F. The digital
operator will display EF where  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- 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
Table 5.38 shows the relationship between the conditions and the value set to H1-:
Terminal Status
Setting
N.O. N.C.

20
21 –

22
23 –

24
25 –

26
27 –

28
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
for details.
100 ms
Figure 5.65 Analog Frequency Reference Sample/Hold
Table 5.38 Stopping Method for External Fault
Detection Conditions
<1>
Detected during
Always Detected
Run only

–
 
– –

–

–
 
– –

–

–
OFF ON
100 ms
<2>
Ramp to Stop Coast to Stop
(fault)

–

–
 
 
– –
– –

–

–
– –
5.7 H: Terminal Functions
Refer to C1-01 to
Frequency
reference
Time
Stopping Method
Fast Stop
(fault) (fault) (continue running)
– –
– –
– –
– –

–

–

–

–

–
5
Alarm Only
–
–
–
–
–
–
–
–
–
241