Hitachi SJ Series, User Manual

Page: 367 / 786

12-17-6
Chapter 12 Inverter Functions
Brake Control 1 Function (with the [ BOK] Setting)
Once the inverter receives an operation
command, it starts the output and accelerate to
the release frequency.
When the brake release establishment waiting
time passes after the release frequency is
reached, the inverter outputs the brake release
signal 037[BRK].
• At this time, if the output current is less than the
current set for the release current, the brake
release signal is not output and the trip occurs with
the [E036] brake error outputting the brake fault
signal 038[BER].
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With
[BOK]
setting
The inverter turns on the release signal [BRK]
and waits for the input (ON) for the check
signal [BOK] without accelerating during the
brake check waiting time. If the [BOK] is not
turned on during the above time, the inverter
trips with the [E036] brake error outputting the
fault signal [BER].
Without
[BOK]
setting
After the release signal [BRK] is turned on, the
process goes to the item 4 regardless of the
brake check waiting time.
If the brake check signal [BOK] is not selected,
when the brake release signal is output, the
inverter starts accelerating again to the set
frequency after the acceleration waiting time
passes.
Once the operation command is turned off, the
inverter decelerates to the brake apply
frequency and turns off the brake release signal
[BRK].
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With
[BOK]
setting
The inverter turns off the release signal [BRK]
and waits for the input (OFF) for the check
signal [BOK] without decelerating during the
brake check waiting time. If the [BOK] is not
turned off during the above time, the inverter
trips with the [E036] brake error outputting the
fault signal [BER].
Without
[BOK]
setting
After the release signal [BRK] is turned off, the
process goes to the item 7 regardless of the
brake check waiting time.
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With
[BOK]
setting
When the check signal [BOK] is turned off, the
inverter decelerates again to 0 Hz after the
stop waiting time passes.
Without
[BOK]
setting
When the release signal [BRK] is turned off,
the inverter decelerates again to 0 Hz after the
stop waiting time passes.
• If the operation command is the forward command,
the parameters on the side of the forward rotation
are adopted; if it is the reverse command, those on
the side of the reverse rotation are adopted.
▼
(1)
(2)
!
(3)
(4)
(5)
(6)
(7)
!
Operation
command
Output
frequency
Brake release signal
037[BRK]
Establishment
waiting time
Acceleration waiting time
Brake check signal
037[BOK]
Stop waiting time
Brake check waiting time
Apply frequency
Release frequency
Brake check waiting time
(2)
(3)
(4)
(6)
(7)
(1)
(5)