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Manual PD4-C (USB)
8 General concepts
Version: 1.4.1 / 22.07.2016 / FIR-v1626
29
8 General concepts
8.1 DS402 Power State machine
8.1.1 State machine
CANopen DS402
To switch the motor controller to an operational state, a state machine must be run through. This is
defined in CANopen standard DS402. State changes are requested in object 6040
(control word). The
actual state of the state machine can be read out from object 6041
(status word).
Control word
State changes are requested via object 6040
h
(control word). The following table lists the bit
combinations that lead to the corresponding state transitions.
State transitions
The diagram shows the possible state transitions.
Not ready to
switch on
Start
Software cannot
rectify error
Switched on
disabled
Ready to
switch on
Switched on
Operation
enabled
3
Quick stop
active
10
Fault
Fault reaction
active
Error occures
No. of the transfer (see
table for explanation)
Torque
voltage switched on for controller
High-level voltage switched on
High-level power
voltage switched on for controller
High-level voltage switched on
No torque at motor
Low-level power
voltage switched on for controller
High-level voltage can be switched on
4
2
5
8
7
1
6
9
13
12
State
without
voltage at
Motor
State
with
voltage at
Motor
Selection of
operating mode
admissible
Selection of
operating mode
not
admissible