YASKAWA E7U Programming Manual page 60

Function: Fast Stop N.O.
Setting: 15
Function: Fast Stop N.C.
Setting: 17
The Fast Stop function operates much like an emergency stop input to the drive. While in the Run mode, if a Fast Stop is input
to the Drive (CLOSED for H1-0x= 15 or OPEN for H1-0x= 17), the Drive will decelerate to a stop with the deceleration time
determined by C1-09 (Fast Stop Time). The Run command can remain closed during the Fast Stop operation. The Drive will
not run, from either the terminals or the digital operator, while the Fast Stop is being input to the Drive. To restart the Drive,
the Fast Stop input must be removed and the Run command must be cycled.
IMPORTANT
Function: Timer Function
Setting: 18
The Timer Function works independently from the Drive. For Timer operation a digital input must be configured for a Timer
Function start (H1-0x= 18), a digital output must be configured as a Timer Function output (H2-0x= 12), and the Timer
Function ON-Delay and OFF-Delay parameters (b4-01 and b4-02, respectively) must be programmed.
Once the applicable parameter are programmed the Timer Function start digital input must be closed at least as long as the
setting of b4-01 before the Timer Function output will close. The Timer Function input must be open for at least as long as the
setting of b4-02 before the Timer Function output will reopen.
Multi-function Contact
Input: Timer Function
Multi-function Contact
Output: Timer Function
RUN
Fast Stop
Input
H1-0x=17
N.C.
Output
Frequency
Fig. 36 Fast Stop Commands Time Chart
Be aware that during rapid deceleration the Drive may fault on an over voltage condition. When faulted, the
Drive output shuts off allowing the motor to coast. The result is an uncontrolled motor state. Therefore, be sure
to set an acceptable deceleration time in parameter C1-09 when using the fast stop feature.
B4-01
Fig. 37 Timer Function Time Chart
C1-09
B4-02
Programming 54
ON (Closed)
OFF (Open)
ON (Closed)
OFF (Open)
B4-01 B4-02
TIME
ON (CLOSED)
OFF
(OPEN)
ON (CLOSED)
OFF (OPEN)