Altivar Process ATV900 - Description of Operating States

Software Setup
NHA80945 04/2017 45
Description of Operating States
Drive Operating State
The operating state of the drive changes depending on whether the control word [Cmd Register] CMd,
is sent or an event occurs (an error detection, for example).
The drive operating state can be identified by the value of the status word [CIA402 State Reg] EtA.
Operating State Description
1 - Not ready to switch
on
Initialization starts. This is a transient state invisible to the communication network.
2 - Switch on disabled
The power stage is not ready to switch on.
The drive is locked, no power is supplied to the motor.
For a separate control stage, it is not necessary to supply the power.
For a separate control stage with mains contactor, the contactor is not closed.
The configuration and adjustment parameters can be modified.
3 - Ready to switch on
The power stage is ready to switch on and awaiting power stage supply mains.
For a separate control stage, it is not necessary to supply the power stage, but the
system expects it in order to change to state 4 - Switched on.
For a separate control stage with mains contactor, the contactor is not closed.
The drive is locked, no power is supplied to the motor.
The configuration and adjustment parameters can be modified.
4 - Switched on
Power stage is switched on.
For a separate control stage, the power stage must be supplied.
For a separate control stage with mains contactor, the contactor is closed.
The drive is locked, no power is supplied to the motor.
The power stage of the drive is ready to operate, but voltage has not yet been
applied to the output.
The adjustment parameters can be modified.
If a configuration parameter is modified, the drive returns to the state 2 - Switch
on disable .
5 - Operation enabled
Power stage is enabled. The drive is in running state
For a separate control stage, the power stage must be supplied.
For a separate control stage with mains contactor, the contactor is closed.
The drive is unlocked, power is supplied to the motor.
The drive functions are activated and voltage is applied to the motor terminals.
If the reference value is zero or the Halt command is applied, no power is supplied
to the motor and no torque is applied. To perform [Auto tuning] tUn, the drive must
be in state 5 - Operation enabled.
The adjustment parameters can be modified.
The configuration parameters cannot be modified.
NOTE: The command 4 - Enable operation must be taken into consideration
only if the channel is valid. In particular, if the channel is involved in the command
and the reference value, transition 4 is possible only after the reference value has
been received once.
The reaction of the drive to a Disable operation command depends on the
value of the [SwitchOnDisable Stp] dOtd parameter:
 If the [SwitchOnDisable Stp] dOtd parameter is set to 0, the drive changes to
operating state 4 - Switched on and stops in freewheel stop.
 If the [SwitchOnDisable Stp] dOtd parameter is set to 1, the drive stops on
ramp and then changes to operating state 4 - Switched on.