Yaskawa VS-626 MC5 User Manual
Page 171
7.3
Common Functions
- 33
D
The output frequency is retained internally, so the same frequency will be output again when the base-
block command is cleared. The output frequency will change in a step pattern when the output re-
sumes, so take some safety precaution such as turning OFF the run command -- especially if the base-
block command was input when the motor was operating at high speed. (When the run command is
turned OFF, the internally retained output frequency is reset to zero.)
D
After a baseblock command is cleared, the voltage will be restored in the voltage recovery time set in
L2-04.
Run/stop command
OFF
ON
Baseblock command
Input
Cleared
Frequency reference
Output frequency
The retained output frequency
is output in a step pattern.
Coasting
Fig
7.17
Baseblock Command
Acceleration/Deceleration Ramp Hold (Setting: A)
OFF
Normal operation or restart acceleration/deceleration.
ON
Pause acceleration/deceleration and maintain the present frequency.
D
With this setting, the multi-function input pauses acceleration or deceleration and maintains (holds)
the output frequency.
D
Acceleration/deceleration is restarted when the acceleration/deceleration ramp hold input is turned
OFF.
D
The motor will be stopped if a stop command is input while the acceleration/deceleration ramp hold
input is ON.
D
When constant d4-01 (the frequency reference hold function selector) is set to 1, the held frequency
will be stored in memory. This stored frequency will be retained even after a power loss and the motor
will be restarted at this frequency when a run command is input again.
Hold
Acceleration/deceleration
ramp hold
Hold
d4-01
=
1
d4-01
=
0
OFF ON
OFF
ON
OFF
ON
OFF
ON
Run/stop command
Frequency reference
Output frequency
Fig
7.18
Acceleration/Deceleration Ramp Hold
D
When d4-01 is set to 1, the held output frequency will be retained. To operate at this frequency even
after the Inverter is stopped, input the run command with the acceleration/deceleration ramp hold input
ON.
D
When d4-01 is set to 0, the output frequency will be held at zero if the run command is input with the
acceleration/deceleration ramp hold input ON.
OH2 Alarm Signal (Setting: B)
OFF
Normal operation
ON
Normal operation (The warning message “OH2” will be displayed on the Digital Operator.)
D
The message “OH2” will be displayed on the Digital Operator while the multi-function input is ON
and the display will revert to its previous status when the input is turned OFF. (It isn’t necessary to reset
the alarm.) The Inverter will continue operation without detecting a fault.
7