7. Device control
Festo P.BE-CMMP-CO-SW-EN 0708NH
135
7.1.2
The Condition Diagram of the Motor Controller
(State Machine)
NOT_READY_TO-SWITCH_ON
SWITCH_ON_DISABLED
READY_TO_SWITCH_ON
SWITCHED_ON
OPERATION_ENABLE
FAULT_REACTION_ACTIVE
FAULT
QUICK_STOP_ACTIVE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Power enabled
(Endstufe an)
Fault
(Fehler)
Power disabled
(Endstufe aus)
Fig. 7.1: Condition diagram of the motor controller
The condition diagram can be roughly divided into three areas: "Power Disabled" means
that the final stage is switched off and "Power Enabled" that the final stage is switched
on. The conditions needed for handling errors are summarised in the "Fault" area.
The most important conditions of the motor controller are shown highlighted in the
diagram. After it is switched on, the motor controller initialises itself and then reaches the
condition
SWITCH_ON_DISABLED
. In this condition, the CAN communication is
completely function capable and the motor controller can be parameterised (e.g. the
"RPM regulation" operating mode is set). The final stage is switched off and the shaft is
thus freely rotatable. Through the condition transitions 2, 3, 4 – which correspond in
principle to the CAN controller enable – one reaches the condition
OPERATION_ENABLE
.
In this condition, the final stage is switched on and the motor regulated in accordance
with the set operating mode. Therefore, you should always make sure beforehand that the
drive is correctly parameterised and that a corresponding nominal value equals zero.
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