Hitachi SJ Series User Manual page 367

Chapter 12
Brake Control 1 Function (with the [BOK] Setting)
Release frequency
Output
frequency
Operation
command
Brake release signal
037[BRK]
Brake check signal
037[BOK]
▼
(1)
Once the inverter receives an operation
command, it starts the output and accelerate to
the release frequency.
(2)
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].
(3)
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With
The inverter turns on the release signal [BRK]
[BOK] and waits for the input (ON) for the check
setting 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 After the release signal [BRK] is turned on, the
[BOK] process goes to the item 4 regardless of the
setting brake check waiting time.
(4)
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.
(1)
(2)
Establishment
waiting time
(4)
Acceleration waiting time
(3)
Brake check waiting time
(5)
Brake check waiting time
(5)
Once the operation command is turned off, the
inverter decelerates to the brake apply
frequency and turns off the brake release signal
[BRK].
(6)
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With The inverter turns off the release signal [BRK]
[BOK] and waits for the input (OFF) for the check
setting 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 After the release signal [BRK] is turned off, the
[BOK] process goes to the item 7 regardless of the
setting brake check waiting time.
(7)
The operation varies depending on whether the
brake check signal 037[BOK] is set to the input
terminal function.
With
When the check signal [BOK] is turned off, the
[BOK] inverter decelerates again to 0 Hz after the
setting stop waiting time passes.
Without When the release signal [BRK] is turned off,
[BOK] the inverter decelerates again to 0 Hz after the
setting 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.
12-17-6
Inverter Functions
Apply frequency
(7)
Stop waiting time
(6)