ABB ACS2000 AFE 1MVA, User Manual

Page: 124 / 177

CHAPTER 8 – OPERATION 124
—
8.5 Status messages
8.5.1 Overview on status messages
The following section lists the status messages of
the main operating states of the drive, the drive
passes through, when it is put into operation (see
8.5.2 Start sequence of the drive ), when it is
stopped (see 8.5.3 Stop sequence of the drive ), or
when a fault condition has occurred. The status
messages are sent to the higher-level control sys-
tem and are displayed on the CDP control panel of
the drive.
NotReadyOn means that the DC link cannot be
charged and the drive cannot be connected to the
main power supply, ie, the main circuit breaker
cannot be closed. The status message is displayed,
eg, when the doors of medium voltage compart-
ments are still open, the grounding switch of the
drive is in the grounded position, or the motor
starter of the fan unit is switched off.
The status message signals that the drive is
healthy and ready for the ON command. The ON
command initiates charging of the DC link capaci-
tors and closing of the main circuit breaker of the
drive. Depending on the control place, the com-
mand can either be sent from the higher-level con-
trol system to the drive or be initiated by pressing
the SUPPLY ON pushbutton on the control com-
partment door.
The status message ReadyOn changes to Charging
when the DC link capacitors of the drive are being
charged.
The status message ReadyRun tells the operator
that the drive is energized and ready for operation.
As soon as the start command is initiated, the
motor is magnetized and the drive starts to modu-
late.
When the drive is in ReadyRef state, it is running
and operating according to the set speed or
torque reference value. When in remote control
mode, the reference value is set by the higher-level
control system. When in local control mode, the
value is entered into the CDP control panel.
Stopping indicates that the drive has received a
stop command and that a ramp or coast stop has
been initiated. The stopping mode depends on the
parameter setting. The status message changes to
ReadyRun when the zero speed threshold is
reached.
When a start command is given while the drive is
stopping, the drive resumes operation and the sta-
tus message changes to
ReadyRef again.
The status message indicates that a fault condi-
tion has occurred that requires a shutdown of the
drive. During shutdown, the status message is
alternating between
Tripped and the specific fault
message.
!
For information on other status mes-
sages, such as fault status messages in
particular, see the
status words in the
Appendix G – Signal and parameter table
of the drive.
Not ready on
Ready on
Charging
Ready run
Ready ref
Stopping
Tripped