YASKAWA A1000 Technical Manual page 239

• If the lower limit is set by d2-02 only, the drive will accelerate to this limit as soon as a Run command is entered.
• If the lower limit is determined by an analog input only, the drive will accelerate to the limit as long as the Run
command and an Up or Down command are active. It will not start running if only the Run command is on.
• If the lower limit is set by both an analog input and d2-02, and the analog limit is higher than the d2-02 value, then the
drive will accelerate to the d2-02 value when a Run command is input. Once the d2-02 value is reached, it will
continue acceleration to the analog limit only if an Up or Down command is set.
Figure 5.61 shows an Up/Down function example with a lower frequency reference limit set by d2-02, and the frequency
reference hold function both enabled (d4-01 = 1) and disabled (d4-01 = 0).
Figure 5.61
Setting 12, 13: Forward Jog, Reverse Jog
Digital inputs programmed as Forward Jog (H1- = 12) and Reverse Jog (H1- = 13) will be Jog inputs that do not
require a Run command. Closing the terminal set for Forward Jog input will cause the drive to ramp to the Jog frequency
reference (d1-17) in the forward direction. The Reverse Jog will cause the same action in the reverse direction. The
Forward Jog and Reverse Jog command can be set independently.
Note: The Forward Jog and Reverse Jog commands override all other frequency references. However, if the drive is set to prohibit
reverse rotation (b1-04 = 1), then activating Reverse Jog will have no effect. If both the Forward Jog and Reverse Jog are input
simultaneously for 500 ms or more, an alarm will occur and the drive will ramp to stop.
Figure 5.62
Setting 14: Fault reset
Whenever the drive detects a fault condition, the fault output contact will close and the drive's output will shut off. The
motor then coasts to stop (specific stopping methods can be selected for some faults such as L1-04 for motor overheat).
Once the Run command is removed, the fault can be cleared by either the RESET key on the digital operator or by
closing a digital input configured as a Fault Reset (H1- = 14).
Note: Fault Reset commands are ignored as long as the Run command is present. To reset a fault, first remove the Run command.
Setting 15, 17: Fast Stop (N.O., N.C.)
The Fast Stop function operates much like an emergency stop input to the drive. If a Fast Stop command is input while
the drive is running, the drive will decelerate to a stop by the deceleration time set to C1-09
Time on page 184). The drive can only be restarted after is has come to a complete stop, the Fast Stop input is off, and
the Run command has been switched off.
• To trigger the Fast Stop function with a N.O. switch, set H1- = 15.
• To trigger the Fast Stop function with a N.C. switch, set H1- = 17.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Output frequency
upper limit
Accelerates to
lower limit
Lower limit
FWD run/stop
ON
Up command
ON
Down command
Power supply
Figure 5.61 Up/Down Command Operation
Output
Frequency
FJOG
RJOG
Figure 5.62 FJOG/RJOG Operation
d4-01 = 1
Same
frequency
ON
Hold
Frequency
reset
ON
d1-17
d1-17
ON
ON
5.7 H: Terminal Functions
d4-01 = 0
ON
(Refer to C1-09: Fast Stop
5
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