CiA402 profile
Description of states
Each state represents an internal reaction by the drive.
This chart will change depending on whether the control word is sent (CMD) or an event occurs (a fault, for example). The drive state can be identified by the value of the status word (ETA).
1 - Not ready to switch on
Initialization starts. This is a transient state invisible to the communication network.
2 - Switch on disabled
The drive is inactive.
The drive is locked, no power is supplied to the motor.
For a separate control section, it is not necessary to supply AC power to the power section.
For a separate control section with line contactor, the contactor is not controlled.
The configuration and adjustment parameters can be modified.
3 - Ready to switch on
Awaiting power section line supply.
For a separate control section, it is not necessary to supply AC power to the power section, but the system will expect it in order to change to state "4 - Switch on".
For a separate control section with line contactor, the contactor is not controlled.
The drive is locked, no power is supplied to the motor.
The configuration and adjustment parameters can be modified.
4 - Switched on
The drive is supplied with AC power but is stationary.
For a separate control section, the power section line supply must be present.
For a separate control section with line contactor, the contactor is controlled.
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.
Modification of a configuration parameter returns the drive to state "2 - Switch on disabled".
5 - Operation enabled
The drive is running.
For a separate control section, the power section line supply must be present.
For a separate control section with line contactor, the contactor is controlled.
The drive is unlocked, power is supplied to the motor.
The drive functions are activated and voltage is applied to the motor terminals.
However, in the case of an
The adjustment parameters can be modified.
The configuration parameters cannot be modified.
Note: The "4 - Enable operation" command must be taken into consideration only when the channel is valid (see Communication monitoring page 51). In particular, if the channel is involved in the command and the reference, transition 4 will take place only after the reference has been received for the first time.
The reaction of the drive to a "Disable operation" command depends on the value of the "Disable operation option code" (DOTD) parameter:
•If the "Disable operation option code" parameter has the value 0, the drive goes to "4 - Switched on" and stops in freewheel stop
•If the "Disable operation option code" parameter has the value 1, the drive stops on ramp and then goes to "4 - Switched on"
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